diff --git a/README.md b/README.md
index 7f5196100..fba10e568 100755
--- a/README.md
+++ b/README.md
@@ -48,7 +48,7 @@ sttp (v2) documentation is available at [sttp.softwaremill.com/en/v2](https://st
 
 sttp (v1) documentation is available at [sttp.softwaremill.com/en/v1](https://sttp.softwaremill.com/en/v1).
 
-scaladoc is available at [https://www.javadoc.io](https://www.javadoc.io/doc/com.softwaremill.sttp.client4/core_2.12/4.0.0-M11)
+scaladoc is available at [https://www.javadoc.io](https://www.javadoc.io/doc/com.softwaremill.sttp.client4/core_2.12/4.0.0-M12)
 
 ## Quickstart with scala-cli
 
@@ -56,7 +56,7 @@ Add the following directive to the top of your scala file to add the core sttp d
 If you are using [scala-cli](https://scala-cli.virtuslab.org), you can quickly start experimenting with sttp by copy-pasting the following:
 
 ```
-//> using lib "com.softwaremill.sttp.client4::core:4.0.0-M11"
+//> using lib "com.softwaremill.sttp.client4::core:4.0.0-M12"
 import sttp.client4.quick._
 quickRequest.get(uri"http://httpbin.org/ip").send()
 ```
@@ -68,7 +68,7 @@ The `quick` package import brings in the sttp API and a pre-configured, global s
 Similarly, using [Ammonite](http://ammonite.io):
 
 ```scala
-import $ivy.`com.softwaremill.sttp.client4::core:4.0.0-M11`
+import $ivy.`com.softwaremill.sttp.client4::core:4.0.0-M12`
 import sttp.client4.quick._
 quickRequest.get(uri"http://httpbin.org/ip").send()
 ```
@@ -78,7 +78,7 @@ quickRequest.get(uri"http://httpbin.org/ip").send()
 Add the following dependency:
 
 ```scala
-"com.softwaremill.sttp.client4" %% "core" % "4.0.0-M11"
+"com.softwaremill.sttp.client4" %% "core" % "4.0.0-M12"
 ```
 
 Then, import:
@@ -133,7 +133,7 @@ The documentation is typechecked using [mdoc](https://scalameta.org/mdoc/). The
 
 When generating documentation, it's best to set the version to the current one, so that the generated doc files don't include modifications with the current snapshot version. 
 
-That is, in sbt run: `set version := "4.0.0-M11"`, before running `mdoc` in `docs`.
+That is, in sbt run: `set version := "4.0.0-M12"`, before running `mdoc` in `docs`.
 
 ### Testing the Scala.JS backend
 
diff --git a/generated-docs/out/backends/akka.md b/generated-docs/out/backends/akka.md
index 68e5730a3..536570a51 100644
--- a/generated-docs/out/backends/akka.md
+++ b/generated-docs/out/backends/akka.md
@@ -3,7 +3,7 @@
 This backend is based on [akka-http](http://doc.akka.io/docs/akka-http/current/scala/http/). To use, add the following dependency to your project:
 
 ```
-"com.softwaremill.sttp.client4" %% "akka-http-backend" % "4.0.0-M11"
+"com.softwaremill.sttp.client4" %% "akka-http-backend" % "4.0.0-M12"
 ```
 
 A fully **asynchronous** backend. Uses the `Future` effect to return responses. There are also [other `Future`-based backends](future.md), which don't depend on Akka. 
diff --git a/generated-docs/out/backends/catseffect.md b/generated-docs/out/backends/catseffect.md
index 29bbcc573..89262b1c8 100644
--- a/generated-docs/out/backends/catseffect.md
+++ b/generated-docs/out/backends/catseffect.md
@@ -14,7 +14,7 @@ Also note that the [http4s](http4s.md) backend can also be created for a type im
 Firstly, add the following dependency to your project:
 
 ```scala
-"com.softwaremill.sttp.client4" %% "cats" % "4.0.0-M11"
+"com.softwaremill.sttp.client4" %% "cats" % "4.0.0-M12"
 ```
 
 Obtain a cats-effect `Resource` which creates the backend, and closes the thread pool after the resource is no longer used:
@@ -82,9 +82,9 @@ Creation of the backend can be done in two basic ways:
 Firstly, add the following dependency to your project:
 
 ```scala
-"com.softwaremill.sttp.client4" %% "armeria-backend-cats" % "4.0.0-M11" // for cats-effect 3.x
+"com.softwaremill.sttp.client4" %% "armeria-backend-cats" % "4.0.0-M12" // for cats-effect 3.x
 // or
-"com.softwaremill.sttp.client4" %% "armeria-backend-cats-ce2" % "4.0.0-M11" // for cats-effect 2.x
+"com.softwaremill.sttp.client4" %% "armeria-backend-cats-ce2" % "4.0.0-M12" // for cats-effect 2.x
 ```
 
 create client:
diff --git a/generated-docs/out/backends/finagle.md b/generated-docs/out/backends/finagle.md
index 576f36ddf..4d6b544e1 100644
--- a/generated-docs/out/backends/finagle.md
+++ b/generated-docs/out/backends/finagle.md
@@ -3,7 +3,7 @@
 To use, add the following dependency to your project:
 
 ```
-"com.softwaremill.sttp.client4" %% "finagle-backend" % "4.0.0-M11"
+"com.softwaremill.sttp.client4" %% "finagle-backend" % "4.0.0-M12"
 ```
 
 Next you'll need to add an implicit value:
diff --git a/generated-docs/out/backends/fs2.md b/generated-docs/out/backends/fs2.md
index f5d66ea9f..192de7026 100644
--- a/generated-docs/out/backends/fs2.md
+++ b/generated-docs/out/backends/fs2.md
@@ -12,9 +12,9 @@ Creation of the backend can be done in two basic ways:
 Firstly, add the following dependency to your project:
 
 ```scala
-"com.softwaremill.sttp.client4" %% "fs2" % "4.0.0-M11" // for cats-effect 3.x & fs2 3.x
+"com.softwaremill.sttp.client4" %% "fs2" % "4.0.0-M12" // for cats-effect 3.x & fs2 3.x
 // or 
-"com.softwaremill.sttp.client4" %% "fs2ce2" % "4.0.0-M11" // for cats-effect 2.x & fs2 2.x
+"com.softwaremill.sttp.client4" %% "fs2ce2" % "4.0.0-M12" // for cats-effect 2.x & fs2 2.x
 ```
 
 Obtain a cats-effect `Resource` which creates the backend, and closes the thread pool after the resource is no longer used:
@@ -78,9 +78,9 @@ Host header override is supported in environments running Java 12 onwards, but i
 To use, add the following dependency to your project:
 
 ```scala
-"com.softwaremill.sttp.client4" %% "armeria-backend-fs2" % "4.0.0-M11" // for cats-effect 3.x & fs2 3.x
+"com.softwaremill.sttp.client4" %% "armeria-backend-fs2" % "4.0.0-M12" // for cats-effect 3.x & fs2 3.x
 // or
-"com.softwaremill.sttp.client4" %% "armeria-backend-fs2" % "4.0.0-M11" // for cats-effect 2.x & fs2 2.x
+"com.softwaremill.sttp.client4" %% "armeria-backend-fs2" % "4.0.0-M12" // for cats-effect 2.x & fs2 2.x
 ```
 
 create client:
diff --git a/generated-docs/out/backends/future.md b/generated-docs/out/backends/future.md
index eef79ece1..cdc4aaeb3 100644
--- a/generated-docs/out/backends/future.md
+++ b/generated-docs/out/backends/future.md
@@ -20,7 +20,7 @@ Class                                 Supported stream type
 To use, you don't need any extra dependencies, `core` is enough:
 
 ```
-"com.softwaremill.sttp.client4" %% "core" % "4.0.0-M11"
+"com.softwaremill.sttp.client4" %% "core" % "4.0.0-M12"
 ```
 
 You'll need the following imports:
@@ -59,7 +59,7 @@ Host header override is supported in environments running Java 12 onwards, but i
 To use, add the following dependency to your project:
 
 ```scala
-"com.softwaremill.sttp.client4" %% "okhttp-backend" % "4.0.0-M11"
+"com.softwaremill.sttp.client4" %% "okhttp-backend" % "4.0.0-M12"
 ```
 
 and some imports:
@@ -91,7 +91,7 @@ This backend depends on [OkHttp](http://square.github.io/okhttp/) and fully supp
 To use, add the following dependency to your project:
 
 ```
-"com.softwaremill.sttp.client4" %% "armeria-backend" % "4.0.0-M11"
+"com.softwaremill.sttp.client4" %% "armeria-backend" % "4.0.0-M12"
 ```
 
 add imports:
diff --git a/generated-docs/out/backends/http4s.md b/generated-docs/out/backends/http4s.md
index 99bc4f44e..93957184e 100644
--- a/generated-docs/out/backends/http4s.md
+++ b/generated-docs/out/backends/http4s.md
@@ -3,9 +3,9 @@
 This backend is based on [http4s](https://http4s.org) (client) and is **asynchronous**. To use, add the following dependency to your project:
 
 ```scala
-"com.softwaremill.sttp.client4" %% "http4s-backend" % "4.0.0-M11" // for cats-effect 3.x & http4s 1.0.0-Mx
+"com.softwaremill.sttp.client4" %% "http4s-backend" % "4.0.0-M12" // for cats-effect 3.x & http4s 1.0.0-Mx
 // or
-"com.softwaremill.sttp.client4" %% "http4s-ce2-backend" % "4.0.0-M11" // for cats-effect 2.x & http4s 0.21.x
+"com.softwaremill.sttp.client4" %% "http4s-ce2-backend" % "4.0.0-M12" // for cats-effect 2.x & http4s 0.21.x
 ```
 
 The backend can be created in a couple of ways, e.g.:
diff --git a/generated-docs/out/backends/javascript/fetch.md b/generated-docs/out/backends/javascript/fetch.md
index b656281f1..c200b4033 100644
--- a/generated-docs/out/backends/javascript/fetch.md
+++ b/generated-docs/out/backends/javascript/fetch.md
@@ -7,7 +7,7 @@ A JavaScript backend with web socket support. Implemented using the [Fetch API](
 This is the default backend, available in the main jar for JS. To use, add the following dependency to your project:
 
 ```
-"com.softwaremill.sttp.client4" %%% "core" % "4.0.0-M11"
+"com.softwaremill.sttp.client4" %%% "core" % "4.0.0-M12"
 ```
 
 And create the backend instance:
@@ -26,7 +26,7 @@ Note that `Fetch` does not pass cookies by default. If your request needs cookie
 To use, add the following dependency to your project:
 
 ```
-"com.softwaremill.sttp.client4" %%% "monix" % "4.0.0-M11"
+"com.softwaremill.sttp.client4" %%% "monix" % "4.0.0-M12"
 ```
 
 And create the backend instance:
@@ -40,7 +40,7 @@ val backend = FetchMonixBackend()
 To use, add the following dependency to your project:
 
 ```
-"com.softwaremill.sttp.client4" %%% "zio" % "4.0.0-M11"
+"com.softwaremill.sttp.client4" %%% "zio" % "4.0.0-M12"
 ```
 
 And create the backend instance:
@@ -55,13 +55,13 @@ Any effect implementing the cats-effect `Concurrent` typeclass can be used. To u
 your project:
 
 ```
-"com.softwaremill.sttp.client4" %%% "cats" % "4.0.0-M11"
+"com.softwaremill.sttp.client4" %%% "cats" % "4.0.0-M12"
 ```
 
 If you are on Cats Effect 2 (CE2) you will need to add the CE2 specific dependency instead:
 
 ```
-"com.softwaremill.sttp.client4" %%% "catsce2 % "4.0.0-M11"
+"com.softwaremill.sttp.client4" %%% "catsce2 % "4.0.0-M12"
 ```
 
 And create the backend instance:
@@ -129,7 +129,7 @@ Streaming support is provided via `FetchMonixBackend`. Note that streaming suppo
 To use, add the following dependency to your project:
 
 ```
-"com.softwaremill.sttp.client4" %%% "monix" % "4.0.0-M11"
+"com.softwaremill.sttp.client4" %%% "monix" % "4.0.0-M12"
 ```
 
 An example of streaming a response:
diff --git a/generated-docs/out/backends/monix.md b/generated-docs/out/backends/monix.md
index d1a342915..0a36fcf6f 100644
--- a/generated-docs/out/backends/monix.md
+++ b/generated-docs/out/backends/monix.md
@@ -12,7 +12,7 @@ Creation of the backend can be done in two basic ways:
 Firstly, add the following dependency to your project:
 
 ```
-"com.softwaremill.sttp.client4" %% "monix" % "4.0.0-M11"
+"com.softwaremill.sttp.client4" %% "monix" % "4.0.0-M12"
 ```
 
 and create the backend using:
@@ -50,7 +50,7 @@ Host header override is supported in environments running Java 12 onwards, but i
 To use, add the following dependency to your project:
 
 ```scala
-"com.softwaremill.sttp.client4" %% "okhttp-backend-monix" % "4.0.0-M11"
+"com.softwaremill.sttp.client4" %% "okhttp-backend-monix" % "4.0.0-M12"
 ```
 
 Create the backend using:
@@ -76,7 +76,7 @@ This backend depends on [OkHttp](http://square.github.io/okhttp/) and fully supp
 To use, add the following dependency to your project:
 
 ```
-"com.softwaremill.sttp.client4" %% "armeria-backend-monix" % "4.0.0-M11"
+"com.softwaremill.sttp.client4" %% "armeria-backend-monix" % "4.0.0-M12"
 ```
 
 add imports:
diff --git a/generated-docs/out/backends/native/curl.md b/generated-docs/out/backends/native/curl.md
index 3be8913b8..7399cf44c 100644
--- a/generated-docs/out/backends/native/curl.md
+++ b/generated-docs/out/backends/native/curl.md
@@ -5,7 +5,7 @@ A Scala Native backend implemented using [Curl](https://github.com/curl/curl/blo
 To use, add the following dependency to your project:
 
 ```
-"com.softwaremill.sttp.client4" %%% "core" % "4.0.0-M11"
+"com.softwaremill.sttp.client4" %%% "core" % "4.0.0-M12"
 ```
 
 and initialize one of the backends:
diff --git a/generated-docs/out/backends/pekko.md b/generated-docs/out/backends/pekko.md
index 59d69bbcb..a87fb3c6a 100644
--- a/generated-docs/out/backends/pekko.md
+++ b/generated-docs/out/backends/pekko.md
@@ -3,7 +3,7 @@
 This backend is based on [pekko-http](https://pekko.apache.org/docs/pekko-http/current/). To use, add the following dependency to your project:
 
 ```
-"com.softwaremill.sttp.client4" %% "pekko-http-backend" % "4.0.0-M11"
+"com.softwaremill.sttp.client4" %% "pekko-http-backend" % "4.0.0-M12"
 ```
 
 A fully **asynchronous** backend. Uses the `Future` effect to return responses. There are also [other `Future`-based backends](future.md), which don't depend on Pekko. 
diff --git a/generated-docs/out/backends/scalaz.md b/generated-docs/out/backends/scalaz.md
index 6fa95c1fc..0c9b2ed34 100644
--- a/generated-docs/out/backends/scalaz.md
+++ b/generated-docs/out/backends/scalaz.md
@@ -8,7 +8,7 @@ The [Scalaz](https://github.com/scalaz/scalaz) backend is **asynchronous**. Send
 To use, add the following dependency to your project:
 
 ```
-"com.softwaremill.sttp.client4" %% "armeria-backend-scalaz" % "4.0.0-M11"
+"com.softwaremill.sttp.client4" %% "armeria-backend-scalaz" % "4.0.0-M12"
 ```
 
 add imports:
diff --git a/generated-docs/out/backends/synchronous.md b/generated-docs/out/backends/synchronous.md
index 49a02c97c..f2603b697 100644
--- a/generated-docs/out/backends/synchronous.md
+++ b/generated-docs/out/backends/synchronous.md
@@ -7,7 +7,7 @@ There are several synchronous backend implementations. Sending a request using t
 The default **synchronous** backend. To use, you don't need any extra dependencies, `core` is enough:
 
 ```
-"com.softwaremill.sttp.client4" %% "core" % "4.0.0-M11"
+"com.softwaremill.sttp.client4" %% "core" % "4.0.0-M12"
 ```
 
 Create the backend using:
@@ -40,7 +40,7 @@ Host header override is supported in environments running Java 12 onwards, but i
 To use, you don't need any extra dependencies, `core` is enough: 
 
 ```
-"com.softwaremill.sttp.client4" %% "core" % "4.0.0-M11"
+"com.softwaremill.sttp.client4" %% "core" % "4.0.0-M12"
 ```
 
 Create the backend using:
@@ -62,7 +62,7 @@ This backend supports host header override, but it has to be enabled by system p
 To use, add the following dependency to your project:
 
 ```
-"com.softwaremill.sttp.client4" %% "okhttp-backend" % "4.0.0-M11"
+"com.softwaremill.sttp.client4" %% "okhttp-backend" % "4.0.0-M12"
 ```
 
 Create the backend using:
diff --git a/generated-docs/out/backends/wrappers/custom.md b/generated-docs/out/backends/wrappers/custom.md
index 4551868cb..72360400f 100644
--- a/generated-docs/out/backends/wrappers/custom.md
+++ b/generated-docs/out/backends/wrappers/custom.md
@@ -260,7 +260,7 @@ object RateLimitingSttpBackend {
 Implementing a new backend is made easy as the tests are published in the `core` jar file under the `tests` classifier. Simply add the follow dependencies to your `build.sbt`:
 
 ```
-"com.softwaremill.sttp.client4" %% "core" % "4.0.0-M11" % Test classifier "tests"
+"com.softwaremill.sttp.client4" %% "core" % "4.0.0-M12" % Test classifier "tests"
 ```
 
 Implement your backend and extend the `HttpTest` class:
@@ -290,9 +290,9 @@ import sttp.client4.impl.cats.implicits._
 from the cats integration module. The module should be available on the classpath after adding following dependency:
 
 ```scala
-"com.softwaremill.sttp.client4" %% "cats" % "4.0.0-M11" // for cats-effect 3.x
+"com.softwaremill.sttp.client4" %% "cats" % "4.0.0-M12" // for cats-effect 3.x
 // or
-"com.softwaremill.sttp.client4" %% "catsce2" % "4.0.0-M11" // for cats-effect 2.x
+"com.softwaremill.sttp.client4" %% "catsce2" % "4.0.0-M12" // for cats-effect 2.x
 ```
 
 The object contains implicits to convert a cats `MonadError` into the sttp `MonadError`, 
diff --git a/generated-docs/out/backends/wrappers/logging.md b/generated-docs/out/backends/wrappers/logging.md
index 29f61d917..eca398162 100644
--- a/generated-docs/out/backends/wrappers/logging.md
+++ b/generated-docs/out/backends/wrappers/logging.md
@@ -28,7 +28,7 @@ Log levels can be configured when creating the `LoggingBackend`, or specified in
 To use the [slf4j](http://www.slf4j.org) logging backend wrapper, add the following dependency to your project:
 
 ```
-"com.softwaremill.sttp.client4" %% "slf4j-backend" % "4.0.0-M11"
+"com.softwaremill.sttp.client4" %% "slf4j-backend" % "4.0.0-M12"
 ``` 
 
 There are three backend wrappers available, which log request & response information using a slf4j `Logger`. To see the logs, you'll need to use an slf4j-compatible logger implementation, e.g.  [logback](http://logback.qos.ch), or use a binding, e.g. [log4j-slf4j](https://logging.apache.org/log4j/2.0/log4j-slf4j-impl/index.html).
@@ -53,5 +53,5 @@ To create a customised logging backend, see the section on [custom backends](cus
 To use the [scribe](https://github.com/outr/scribe) logging backend wrapper, add the following dependency to your project:
 
 ```
-"com.softwaremill.sttp.client4" %% "scribe-backend" % "4.0.0-M11"
+"com.softwaremill.sttp.client4" %% "scribe-backend" % "4.0.0-M12"
 ``` 
\ No newline at end of file
diff --git a/generated-docs/out/backends/wrappers/opentelemetry.md b/generated-docs/out/backends/wrappers/opentelemetry.md
index a45a0c6a2..59ae243bd 100644
--- a/generated-docs/out/backends/wrappers/opentelemetry.md
+++ b/generated-docs/out/backends/wrappers/opentelemetry.md
@@ -12,7 +12,7 @@ The backend depends only on [opentelemetry-api](https://github.com/open-telemetr
 following dependency to your project:
 
 ```
-"com.softwaremill.sttp.client4" %% "opentelemetry-metrics-backend" % "4.0.0-M11"
+"com.softwaremill.sttp.client4" %% "opentelemetry-metrics-backend" % "4.0.0-M12"
 ```
 
 Then an instance can be obtained as follows:
@@ -55,7 +55,7 @@ OpenTelemetryMetricsBackend(
 To use, add the following dependency to your project:
 
 ```
-"com.softwaremill.sttp.client4" %% "opentelemetry-tracing-zio-backend" % "4.0.0-M11"  // for ZIO 2.x
+"com.softwaremill.sttp.client4" %% "opentelemetry-tracing-zio-backend" % "4.0.0-M12"  // for ZIO 2.x
 ```
 
 This backend depends on [zio-opentelemetry](https://github.com/zio/zio-telemetry).
diff --git a/generated-docs/out/backends/wrappers/prometheus.md b/generated-docs/out/backends/wrappers/prometheus.md
index c1af6e6b2..32c1f04af 100644
--- a/generated-docs/out/backends/wrappers/prometheus.md
+++ b/generated-docs/out/backends/wrappers/prometheus.md
@@ -3,7 +3,7 @@
 To use, add the following dependency to your project:
 
 ```
-"com.softwaremill.sttp.client4" %% "prometheus-backend" % "4.0.0-M11"
+"com.softwaremill.sttp.client4" %% "prometheus-backend" % "4.0.0-M12"
 ```
 
 and some imports:
diff --git a/generated-docs/out/backends/zio.md b/generated-docs/out/backends/zio.md
index 8d0be17f9..952e91c5c 100644
--- a/generated-docs/out/backends/zio.md
+++ b/generated-docs/out/backends/zio.md
@@ -9,8 +9,8 @@ The `*-zio` modules depend on ZIO 2.x. For ZIO 1.x support, use modules with the
 To use, add the following dependency to your project:
 
 ```
-"com.softwaremill.sttp.client4" %% "zio" % "4.0.0-M11"  // for ZIO 2.x
-"com.softwaremill.sttp.client4" %% "zio1" % "4.0.0-M11" // for ZIO 1.x
+"com.softwaremill.sttp.client4" %% "zio" % "4.0.0-M12"  // for ZIO 2.x
+"com.softwaremill.sttp.client4" %% "zio1" % "4.0.0-M12" // for ZIO 1.x
 ```
 
 Create the backend using:
@@ -45,8 +45,8 @@ Host header override is supported in environments running Java 12 onwards, but i
 To use, add the following dependency to your project:
 
 ```
-"com.softwaremill.sttp.client4" %% "armeria-backend-zio" % "4.0.0-M11"  // for ZIO 2.x
-"com.softwaremill.sttp.client4" %% "armeria-backend-zio1" % "4.0.0-M11" // for ZIO 1.x
+"com.softwaremill.sttp.client4" %% "armeria-backend-zio" % "4.0.0-M12"  // for ZIO 2.x
+"com.softwaremill.sttp.client4" %% "armeria-backend-zio1" % "4.0.0-M12" // for ZIO 1.x
 ```
 
 add imports:
diff --git a/generated-docs/out/examples.md b/generated-docs/out/examples.md
index b64d23888..742626339 100644
--- a/generated-docs/out/examples.md
+++ b/generated-docs/out/examples.md
@@ -7,7 +7,7 @@ All of the examples are available [in the sources](https://github.com/softwaremi
 Required dependencies:
 
 ```scala            
-libraryDependencies ++= List("com.softwaremill.sttp.client4" %% "core" % "4.0.0-M11")
+libraryDependencies ++= List("com.softwaremill.sttp.client4" %% "core" % "4.0.0-M12")
 ```
 
 Example code:
@@ -22,7 +22,7 @@ Example code:
 Required dependencies:
 
 ```scala            
-libraryDependencies ++= List("com.softwaremill.sttp.client4" %% "core" % "4.0.0-M11")
+libraryDependencies ++= List("com.softwaremill.sttp.client4" %% "core" % "4.0.0-M12")
 ```
 
 Example code:
@@ -38,8 +38,8 @@ Required dependencies:
 
 ```scala
 libraryDependencies ++= List(
-  "com.softwaremill.sttp.client4" %% "akka-http-backend" % "4.0.0-M11",
-  "com.softwaremill.sttp.client4" %% "json4s" % "4.0.0-M11",
+  "com.softwaremill.sttp.client4" %% "akka-http-backend" % "4.0.0-M12",
+  "com.softwaremill.sttp.client4" %% "json4s" % "4.0.0-M12",
   "org.json4s" %% "json4s-native" % "3.6.0"
 )
 ```
@@ -57,8 +57,8 @@ Required dependencies:
 
 ```scala
 libraryDependencies ++= List(
-  "com.softwaremill.sttp.client4" %% "zio" % "4.0.0-M11",
-  "com.softwaremill.sttp.client4" %% "circe" % "4.0.0-M11",
+  "com.softwaremill.sttp.client4" %% "zio" % "4.0.0-M12",
+  "com.softwaremill.sttp.client4" %% "circe" % "4.0.0-M12",
   "io.circe" %% "circe-generic" % "0.14.6"
 )
 ```
@@ -76,8 +76,8 @@ Required dependencies:
 
 ```scala
 libraryDependencies ++= List(
-  "com.softwaremill.sttp.client4" %% "monix" % "4.0.0-M11",
-  "com.softwaremill.sttp.client4" %% "circe" % "4.0.0-M11",
+  "com.softwaremill.sttp.client4" %% "monix" % "4.0.0-M12",
+  "com.softwaremill.sttp.client4" %% "circe" % "4.0.0-M12",
   "io.circe" %% "circe-generic" % "0.14.6"
 )
 ```
@@ -95,8 +95,8 @@ Required dependencies:
 
 ```scala
 libraryDependencies ++= List(
-  "com.softwaremill.sttp.client4" %% "slf4j-backend" % "4.0.0-M11",
-  "com.softwaremill.sttp.client4" %% "circe" % "4.0.0-M11",
+  "com.softwaremill.sttp.client4" %% "slf4j-backend" % "4.0.0-M12",
+  "com.softwaremill.sttp.client4" %% "circe" % "4.0.0-M12",
   "io.circe" %% "circe-generic" % "0.14.6"
 )
 ```
@@ -114,8 +114,8 @@ Required dependencies:
 
 ```scala
 libraryDependencies ++= List(
-  "com.softwaremill.sttp.client4" %% "monix" % "4.0.0-M11",
-  "com.softwaremill.sttp.client4" %% "circe" % "4.0.0-M11",
+  "com.softwaremill.sttp.client4" %% "monix" % "4.0.0-M12",
+  "com.softwaremill.sttp.client4" %% "circe" % "4.0.0-M12",
   "io.circe" %% "circe-generic" % "0.14.6"
 )
 ```
@@ -132,7 +132,7 @@ Example code:
 Required dependencies:
 
 ```scala
-libraryDependencies ++= List("com.softwaremill.sttp.client4" %% "core" % "4.0.0-M11")
+libraryDependencies ++= List("com.softwaremill.sttp.client4" %% "core" % "4.0.0-M12")
 ```
 
 Example code:
@@ -146,7 +146,7 @@ Example code:
 Required dependencies:
 
 ```scala
-libraryDependencies ++= List("com.softwaremill.sttp.client4" %% "zio" % "4.0.0-M11")
+libraryDependencies ++= List("com.softwaremill.sttp.client4" %% "zio" % "4.0.0-M12")
 ```
 
 Example code:
@@ -161,7 +161,7 @@ Example code:
 Required dependencies:
 
 ```scala
-libraryDependencies ++= List("com.softwaremill.sttp.client4" %% "fs2" % "4.0.0-M11")
+libraryDependencies ++= List("com.softwaremill.sttp.client4" %% "fs2" % "4.0.0-M12")
 ```
 
 Example code:
@@ -176,7 +176,7 @@ Example code:
 Required dependencies:
 
 ```scala
-libraryDependencies ++= List("com.softwaremill.sttp.client4" %% "monix" % "4.0.0-M11")
+libraryDependencies ++= List("com.softwaremill.sttp.client4" %% "monix" % "4.0.0-M12")
 ```
 
 Example code:
@@ -191,7 +191,7 @@ Example code:
 Required dependencies:
 
 ```scala
-libraryDependencies ++= List("com.softwaremill.sttp.client4" %% "akka-http-backend" % "4.0.0-M11")
+libraryDependencies ++= List("com.softwaremill.sttp.client4" %% "akka-http-backend" % "4.0.0-M12")
 ```
 
 Example code:
@@ -206,7 +206,7 @@ Example code:
 Required dependencies:
 
 ```scala
-libraryDependencies ++= List("com.softwaremill.sttp.client4" %% "pekko-http-backend" % "4.0.0-M11")
+libraryDependencies ++= List("com.softwaremill.sttp.client4" %% "pekko-http-backend" % "4.0.0-M12")
 ```
 
 Example code:
@@ -221,7 +221,7 @@ Example code:
 Required dependencies:
 
 ```scala
-libraryDependencies ++= List("com.softwaremill.sttp.client4" %% "monix" % "4.0.0-M11")
+libraryDependencies ++= List("com.softwaremill.sttp.client4" %% "monix" % "4.0.0-M12")
 ```
 
 Example code:
@@ -236,7 +236,7 @@ Example code:
 Required dependencies:
 
 ```scala
-libraryDependencies ++= List("com.softwaremill.sttp.client4" %% "fs2" % "4.0.0-M11")
+libraryDependencies ++= List("com.softwaremill.sttp.client4" %% "fs2" % "4.0.0-M12")
 ```
 
 Example code:
@@ -251,7 +251,7 @@ Example code:
 Required dependencies:
 
 ```scala
-libraryDependencies ++= List("com.softwaremill.sttp.client4" %% "zio" % "4.0.0-M11")
+libraryDependencies ++= List("com.softwaremill.sttp.client4" %% "zio" % "4.0.0-M12")
 ```
 
 Example code:
@@ -266,7 +266,7 @@ Example code:
 Required dependencies:
 
 ```scala
-libraryDependencies ++= List("com.softwaremill.sttp.client4" %% "zio" % "4.0.0-M11")
+libraryDependencies ++= List("com.softwaremill.sttp.client4" %% "zio" % "4.0.0-M12")
 ```
 
 Example code:
@@ -281,7 +281,7 @@ Example code:
 Required dependencies:
 
 ```scala            
-libraryDependencies ++= List("com.softwaremill.sttp.client4" %% "core" % "4.0.0-M11")
+libraryDependencies ++= List("com.softwaremill.sttp.client4" %% "core" % "4.0.0-M12")
 ```
 
 Example code:
diff --git a/generated-docs/out/json.md b/generated-docs/out/json.md
index aa4e5a22a..3baaabf45 100644
--- a/generated-docs/out/json.md
+++ b/generated-docs/out/json.md
@@ -34,7 +34,7 @@ case class ResponsePayload(data: String)
 JSON encoding of bodies and decoding of responses can be handled using [Circe](https://circe.github.io/circe/) by the `circe` module. To use add the following dependency to your project:
 
 ```scala
-"com.softwaremill.sttp.client4" %% "circe" % "4.0.0-M11"
+"com.softwaremill.sttp.client4" %% "circe" % "4.0.0-M12"
 ```
 
 This module adds a body serialized, so that json payloads can be sent as request bodies. To send a payload of type `T` as json, a `io.circe.Encoder[T]` implicit value must be available in scope.
@@ -66,7 +66,7 @@ Arbitrary JSON structures can be traversed by parsing the result as `io.circe.Js
 To encode and decode json using json4s, add the following dependency to your project:
 
 ```
-"com.softwaremill.sttp.client4" %% "json4s" % "4.0.0-M11"
+"com.softwaremill.sttp.client4" %% "json4s" % "4.0.0-M12"
 "org.json4s" %% "json4s-native" % "3.6.0"
 ```
 
@@ -100,7 +100,7 @@ val response: Response[Either[ResponseException[String, Exception], ResponsePayl
 To encode and decode JSON using [spray-json](https://github.com/spray/spray-json), add the following dependency to your project:
 
 ```
-"com.softwaremill.sttp.client4" %% "spray-json" % "4.0.0-M11"
+"com.softwaremill.sttp.client4" %% "spray-json" % "4.0.0-M12"
 ```
 
 Using this module it is possible to set request bodies and read response bodies as your custom types, using the implicitly available instances of `spray.json.JsonWriter` / `spray.json.JsonReader` or `spray.json.JsonFormat`.
@@ -132,13 +132,13 @@ val response: Response[Either[ResponseException[String, Exception], ResponsePayl
 To encode and decode JSON using [play-json](https://www.playframework.com), add the following dependency to your project:
 
 ```scala
-"com.softwaremill.sttp.client4" %% "play-json" % "4.0.0-M11"
+"com.softwaremill.sttp.client4" %% "play-json" % "4.0.0-M12"
 ```
 
 If you use older version of play (2.9.x), add the following dependency to your project:
 
 ```scala
-"com.softwaremill.sttp.client4" %% "play29-json" % "4.0.0-M11"
+"com.softwaremill.sttp.client4" %% "play29-json" % "4.0.0-M12"
 ```
 
 To use, add an import: `import sttp.client4.playJson._`.
@@ -150,13 +150,13 @@ To encode and decode JSON using the high-performance [zio-json](https://zio.gith
 The `zio-json` module depends on ZIO 2.x. For ZIO 1.x support, use `zio1-json`.
 
 ```scala
-"com.softwaremill.sttp.client4" %% "zio-json" % "4.0.0-M11"  // for ZIO 2.x
-"com.softwaremill.sttp.client4" %% "zio1-json" % "4.0.0-M11" // for ZIO 1.x
+"com.softwaremill.sttp.client4" %% "zio-json" % "4.0.0-M12"  // for ZIO 2.x
+"com.softwaremill.sttp.client4" %% "zio1-json" % "4.0.0-M12" // for ZIO 1.x
 ```
 or for ScalaJS (cross build) projects:
 ```scala
-"com.softwaremill.sttp.client4" %%% "zio-json" % "4.0.0-M11"  // for ZIO 2.x
-"com.softwaremill.sttp.client4" %%% "zio1-json" % "4.0.0-M11" // for ZIO 1.x
+"com.softwaremill.sttp.client4" %%% "zio-json" % "4.0.0-M12"  // for ZIO 2.x
+"com.softwaremill.sttp.client4" %%% "zio1-json" % "4.0.0-M12" // for ZIO 1.x
 ```
 
 To use, add an import: `import sttp.client4.ziojson._` (or extend `SttpZioJsonApi`), define an implicit `JsonCodec`, or `JsonDecoder`/`JsonEncoder` for your datatype.
@@ -188,13 +188,13 @@ basicRequest
 To encode and decode JSON using the [high(est)-performant](https://plokhotnyuk.github.io/jsoniter-scala/) [jsoniter-scala](https://github.com/plokhotnyuk/jsoniter-scala) library, one add the following dependency to your project.
 
 ```scala
-"com.softwaremill.sttp.client4" %% "jsoniter" % "4.0.0-M11"
+"com.softwaremill.sttp.client4" %% "jsoniter" % "4.0.0-M12"
 ```
 
 or for ScalaJS (cross build) projects:
 
 ```scala
-"com.softwaremill.sttp.client4" %%% "jsoniter" % "4.0.0-M11"
+"com.softwaremill.sttp.client4" %%% "jsoniter" % "4.0.0-M12"
 ```
 
 To use, add an import: `import sttp.client4.jsoniter._` (or extend `SttpJsonIterJsonApi`), define an implicit `JsonCodec`, or `JsonDecoder`/`JsonEncoder` for your datatype.
@@ -228,13 +228,13 @@ basicRequest
 To encode and decode JSON using the [uPickle](https://github.com/com-lihaoyi/upickle) library, add the following dependency to your project:
 
 ```scala
-"com.softwaremill.sttp.client4" %% "upickle" % "4.0.0-M11"
+"com.softwaremill.sttp.client4" %% "upickle" % "4.0.0-M12"
 ```
 
 or for ScalaJS (cross build) projects:
 
 ```scala
-"com.softwaremill.sttp.client4" %%% "upickle" % "4.0.0-M11"
+"com.softwaremill.sttp.client4" %%% "upickle" % "4.0.0-M12"
 ```
 
 To use, add an import: `import sttp.client4.upicklejson.default._` and define an implicit `ReadWriter` (or separately `Reader` and `Writer`) for your datatype.
diff --git a/generated-docs/out/openapi.md b/generated-docs/out/openapi.md
index f0e2cae1e..636e1970b 100644
--- a/generated-docs/out/openapi.md
+++ b/generated-docs/out/openapi.md
@@ -43,8 +43,8 @@ lazy val petstoreApi: Project = project
     openApiGeneratorName := "scala-sttp",
     openApiOutputDir := baseDirectory.value.name,
     libraryDependencies ++= Seq(
-      "com.softwaremill.sttp.client4" %% "core" % "4.0.0-M11",
-      "com.softwaremill.sttp.client4" %% "json4s" % "4.0.0-M11",
+      "com.softwaremill.sttp.client4" %% "core" % "4.0.0-M12",
+      "com.softwaremill.sttp.client4" %% "json4s" % "4.0.0-M12",
       "org.json4s" %% "json4s-jackson" % "3.6.8"
     )
   )
@@ -94,8 +94,8 @@ lazy val petstoreApi: Project = project
     openApiOutputDir := baseDirectory.value.name,
     openApiIgnoreFileOverride := s"${baseDirectory.in(ThisBuild).value.getPath}/openapi-ignore-file",
     libraryDependencies ++= Seq(
-      "com.softwaremill.sttp.client4" %% "core" % "4.0.0-M11",
-      "com.softwaremill.sttp.client4" %% "json4s" % "4.0.0-M11",
+      "com.softwaremill.sttp.client4" %% "core" % "4.0.0-M12",
+      "com.softwaremill.sttp.client4" %% "json4s" % "4.0.0-M12",
       "org.json4s" %% "json4s-jackson" % "3.6.8"
     ),
     (compile in Compile) := ((compile in Compile) dependsOn openApiGenerate).value,
diff --git a/generated-docs/out/quickstart.md b/generated-docs/out/quickstart.md
index 5df98c146..e0f719da1 100644
--- a/generated-docs/out/quickstart.md
+++ b/generated-docs/out/quickstart.md
@@ -15,7 +15,7 @@ platforms, and that each has its own dedicated set of backends.
 The basic dependency which provides the API, together with a synchronous and `Future`-based backends, is:
 
 ```scala
-"com.softwaremill.sttp.client4" %% "core" % "4.0.0-M11"
+"com.softwaremill.sttp.client4" %% "core" % "4.0.0-M12"
 ```
 
 ## Using scala-cli
@@ -23,7 +23,7 @@ The basic dependency which provides the API, together with a synchronous and `Fu
 Add the following directive to the top of your scala file to add the core sttp dependency:
 
 ```
-//> using lib "com.softwaremill.sttp.client4::core:4.0.0-M11"
+//> using lib "com.softwaremill.sttp.client4::core:4.0.0-M12"
 ```
 
 ## Using Ammonite
@@ -31,7 +31,7 @@ Add the following directive to the top of your scala file to add the core sttp d
 If you are an [Ammonite](https://ammonite.io) user, you can quickly start experimenting with sttp by copy-pasting the following:
 
 ```scala
-import $ivy.`com.softwaremill.sttp.client4::core:4.0.0-M11`
+import $ivy.`com.softwaremill.sttp.client4::core:4.0.0-M12`
 ```
 
 ## Imports
@@ -72,7 +72,7 @@ As an example, to integrate with the [uPickle](https://github.com/com-lihaoyi/up
 dependency:
 
 ```scala
-"com.softwaremill.sttp.client4" %% "upickle" % "4.0.0-M11"
+"com.softwaremill.sttp.client4" %% "upickle" % "4.0.0-M12"
 ```
 
 Your code might then look as follows:
@@ -109,7 +109,7 @@ Logging can be added using the [logging backend wrapper](backends/wrappers/loggi
 use slf4j, you'll need the following dependency:
 
 ```
-"com.softwaremill.sttp.client4" %% "slf4j-backend" % "4.0.0-M11"
+"com.softwaremill.sttp.client4" %% "slf4j-backend" % "4.0.0-M12"
 ```
 
 Then, you'll need to configure your client: