diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 89c7b42..0734bb5 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -28,7 +28,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest]
-        scala: [2.13.8, 3.3.0]
+        scala: [2.13.11, 3.3.0]
         java: [temurin@8]
         project: [rootJS, rootJVM]
     runs-on: ${{ matrix.os }}
@@ -143,22 +143,22 @@ jobs:
             ~/Library/Caches/Coursier/v1
           key: ${{ runner.os }}-sbt-cache-v2-${{ hashFiles('**/*.sbt') }}-${{ hashFiles('project/build.properties') }}
 
-      - name: Download target directories (2.13.8, rootJS)
+      - name: Download target directories (2.13.11, rootJS)
         uses: actions/download-artifact@v3
         with:
-          name: target-${{ matrix.os }}-${{ matrix.java }}-2.13.8-rootJS
+          name: target-${{ matrix.os }}-${{ matrix.java }}-2.13.11-rootJS
 
-      - name: Inflate target directories (2.13.8, rootJS)
+      - name: Inflate target directories (2.13.11, rootJS)
         run: |
           tar xf targets.tar
           rm targets.tar
 
-      - name: Download target directories (2.13.8, rootJVM)
+      - name: Download target directories (2.13.11, rootJVM)
         uses: actions/download-artifact@v3
         with:
-          name: target-${{ matrix.os }}-${{ matrix.java }}-2.13.8-rootJVM
+          name: target-${{ matrix.os }}-${{ matrix.java }}-2.13.11-rootJVM
 
-      - name: Inflate target directories (2.13.8, rootJVM)
+      - name: Inflate target directories (2.13.11, rootJVM)
         run: |
           tar xf targets.tar
           rm targets.tar
diff --git a/build.sbt b/build.sbt
index 64155e3..40754dd 100644
--- a/build.sbt
+++ b/build.sbt
@@ -14,7 +14,7 @@ ThisBuild / tlSonatypeUseLegacyHost := true
 
 val Scala3 = "3.3.0"
 
-ThisBuild / crossScalaVersions := Seq("2.13.8", Scala3)
+ThisBuild / crossScalaVersions := Seq("2.13.11", Scala3)
 ThisBuild / scalaVersion := Scala3
 
 ThisBuild / testFrameworks += new TestFramework("munit.Framework")
diff --git a/core/src/main/scala/io/chrisdavenport/http4s/log4cats/ClientMiddleware.scala b/core/src/main/scala/io/chrisdavenport/http4s/log4cats/ClientMiddleware.scala
index 10439fa..f6aa1aa 100644
--- a/core/src/main/scala/io/chrisdavenport/http4s/log4cats/ClientMiddleware.scala
+++ b/core/src/main/scala/io/chrisdavenport/http4s/log4cats/ClientMiddleware.scala
@@ -11,7 +11,6 @@ import cats.effect.syntax.all._
 import cats.data.{Kleisli, OptionT}
 import org.typelevel.log4cats.{StructuredLogger, SelfAwareStructuredLogger}
 import org.typelevel.log4cats.extras.LogLevel
-import scala.collection.immutable.MapBuilderImpl
 import org.http4s.client.RequestKey
 import cats.effect.kernel.Outcome.Canceled
 import cats.effect.kernel.Outcome.Errored
@@ -330,7 +329,7 @@ object ClientMiddleware {
   }
 
   private def request[F[_]](request: Request[Pure], headers: Set[CIString], routeClassifier: Request[Pure] => Option[String], includeUrl: Request[Pure] => Boolean, additionalRequestContext: Request[Pure] => Map[String, String]): Map[String, String] = {
-    val builder = MapBuilderImpl[String, String]()
+    val builder = Map.newBuilder[String, String]
     builder += HttpStructuredContext.Common.method(request.method)
     if (includeUrl(request)) {
       builder += HttpStructuredContext.Common.url(request.uri)
@@ -382,7 +381,7 @@ object ClientMiddleware {
   }
 
   def response[F[_]](response: Response[Pure], headers: Set[CIString], responseAdditionalContext: Response[Pure] => Map[String, String]): Map[String, String] = {
-    val builder = MapBuilderImpl[String, String]()
+    val builder = Map.newBuilder[String, String]
 
     builder += HttpStructuredContext.Common.status(response.status)
     response.contentLength.foreach(l => 
diff --git a/core/src/main/scala/io/chrisdavenport/http4s/log4cats/ServerMiddleware.scala b/core/src/main/scala/io/chrisdavenport/http4s/log4cats/ServerMiddleware.scala
index f1499ab..682e610 100644
--- a/core/src/main/scala/io/chrisdavenport/http4s/log4cats/ServerMiddleware.scala
+++ b/core/src/main/scala/io/chrisdavenport/http4s/log4cats/ServerMiddleware.scala
@@ -12,7 +12,6 @@ import cats.effect.syntax.all._
 import cats.data.{Kleisli, OptionT}
 import org.typelevel.log4cats.{StructuredLogger, SelfAwareStructuredLogger}
 import org.typelevel.log4cats.extras.LogLevel
-import scala.collection.immutable.MapBuilderImpl
 import org.http4s.client.RequestKey
 import cats.effect.kernel.Outcome.Canceled
 import cats.effect.kernel.Outcome.Errored
@@ -516,7 +515,7 @@ object ServerMiddleware {
   }
 
   private def request[F[_]](request: Request[Pure], headers: Set[CIString], routeClassifier: Request[Pure] => Option[String], includeUrl: Request[Pure] => Boolean, additionalRequestContext: Request[Pure] => Map[String, String]): Map[String, String] = {
-    val builder = MapBuilderImpl[String, String]()
+    val builder = Map.newBuilder[String, String]
     builder += HttpStructuredContext.Common.method(request.method)
     if (includeUrl(request)) {
       builder += HttpStructuredContext.Common.url(request.uri)
@@ -565,7 +564,7 @@ object ServerMiddleware {
   }
 
   def response[F[_]](response: Response[Pure], headers: Set[CIString], responseAdditionalContext: Response[Pure] => Map[String, String]): Map[String, String] = {
-    val builder = MapBuilderImpl[String, String]()
+    val builder = Map.newBuilder[String, String]
 
     builder += HttpStructuredContext.Common.status(response.status)
     response.contentLength.foreach(l =>