diff --git a/.github/workflows/action.yml b/.github/workflows/action.yml
index 471f24f..76c5233 100644
--- a/.github/workflows/action.yml
+++ b/.github/workflows/action.yml
@@ -21,7 +21,7 @@ jobs:
           - macOS-latest
 
         nim-version:
-          - '1.6.16'
+          - '1.6.18'
           - stable
           - devel
 
@@ -53,7 +53,5 @@ jobs:
     - name: Install Packages
       run: nimble install -y
 
-    # - name: server -d:chronosStrictException check
-    #   run: nim c -d:chronosStrictException src/scorper/http/streamserver.nim
     - name: Test
       run: nimble -y --silent test
\ No newline at end of file
diff --git a/README.md b/README.md
index 8020c9d..77c7450 100644
--- a/README.md
+++ b/README.md
@@ -187,18 +187,6 @@ transformed, in order to catch any exceptions and transfer them to the `Future`.
 > Effectively, this means that while code can be compiled with
 `{.push raises: [Defect]}`, the intended effect propagation and checking is
 **disabled** for `async` functions.
->
-> To enable checking exception effects in `async` code, enable strict mode with
-**`-d:chronosStrictException`**.
->
-> In the strict mode, `async` functions are checked such that they only raise
-`CatchableError` and thus must make sure to explicitly specify exception
-effects on forward declarations, callbacks and methods using
-`{.raises: [CatchableError].}` (or more strict) annotations.
-
-See `chronos` [#Error handling](https://github.com/status-im/nim-chronos#error-handling) for more details.
-
-Use `-d:chronosStrictException` to enable strict mode as explained above.
 
 ## Todos  
 
diff --git a/scorper.nimble b/scorper.nimble
index a75d8ca..cee988d 100644
--- a/scorper.nimble
+++ b/scorper.nimble
@@ -10,7 +10,7 @@ installExt = @["nim"]
 # namedbin = {"scorper/http/routermacros":"routermacros" }.toTable()
 # Dependencies
 
-requires "nim >= 1.6.16" # initial 1.3.1
+requires "nim >= 1.6.18" # initial 1.3.1
 # requires "chronos >= 3.0.2" # initial 2.6.1
 requires "chronos"
 requires "npeg"
@@ -52,9 +52,6 @@ task bench_h,"benchmark simple responses with httpbeast":
   exec "nim c -r -d:release --threads:on -d:port=7777 -d:demoPath=benchmark/simple_resp.nim benchmark/benchmark_resp.nim"
   exec "nim c -r -d:release --threads:on -d:port=6666 -d:demoPath=benchmark/simple_resp_httpbeast.nim benchmark/benchmark_resp.nim"
 
-task strict, "stric async exception check":
-  exec "nimble test -d:chronosStrictException"
-
 
 # before test:
 #   requires "asynctest >= 0.3.2 & < 0.4.0"