diff --git a/.github/workflows/ios_lib.merge_request.yml b/.github/workflows/ios_lib.merge_request.yml
index 932e47b..b258bb1 100644
--- a/.github/workflows/ios_lib.merge_request.yml
+++ b/.github/workflows/ios_lib.merge_request.yml
@@ -12,7 +12,7 @@ on:
 
 jobs:
   check:
-    runs-on: macos-latest
+    runs-on: macos-11
     steps:
       - uses: actions/checkout@v2
 
diff --git a/.github/workflows/ios_lib.publish.yml b/.github/workflows/ios_lib.publish.yml
index 8b56600..aa7ac68 100644
--- a/.github/workflows/ios_lib.publish.yml
+++ b/.github/workflows/ios_lib.publish.yml
@@ -19,7 +19,7 @@ on:
 jobs:
   build:
 
-    runs-on: macos-latest
+    runs-on: macos-11
 
     steps:
       - uses: actions/checkout@v3