diff --git a/.github/workflows/bindings-server.yaml b/.github/workflows/bindings-server.yaml
index 55c39d596..352e634e0 100644
--- a/.github/workflows/bindings-server.yaml
+++ b/.github/workflows/bindings-server.yaml
@@ -21,7 +21,7 @@ jobs:
       uses: 'actions/checkout@v7'
     - id: 'step-1'
       name: 'Downgrade Kotlin'
-      uses: 'fwilhe2/setup-kotlin@v1'
+      uses: 'fwilhe2/setup-kotlin@v1.9'
       with:
         version: '2.3.21'
     - id: 'step-2'
@@ -88,7 +88,7 @@ jobs:
         .github/workflows/test-served-bindings-depend-on-library.main.kts
     - id: 'step-8'
       name: 'Install Kotlin 1.9.0'
-      uses: 'fwilhe2/setup-kotlin@v1'
+      uses: 'fwilhe2/setup-kotlin@v1.9'
       with:
         version: '1.9.0'
     - id: 'step-9'
@@ -102,7 +102,7 @@ jobs:
         grep "was compiled with an incompatible version of Kotlin" output.txt
     - id: 'step-11'
       name: 'Install Kotlin 2.0.0'
-      uses: 'fwilhe2/setup-kotlin@v1'
+      uses: 'fwilhe2/setup-kotlin@v1.9'
       with:
         version: '2.0.0'
     - id: 'step-12'
diff --git a/.github/workflows/build.yaml b/.github/workflows/build.yaml
index c6a839396..1b84bd75b 100644
--- a/.github/workflows/build.yaml
+++ b/.github/workflows/build.yaml
@@ -18,7 +18,7 @@ jobs:
       uses: 'actions/checkout@v7'
     - id: 'step-1'
       name: 'Downgrade Kotlin'
-      uses: 'fwilhe2/setup-kotlin@v1'
+      uses: 'fwilhe2/setup-kotlin@v1.9'
       with:
         version: '2.3.21'
     - id: 'step-2'
@@ -166,7 +166,7 @@ jobs:
       uses: 'actions/checkout@v7'
     - id: 'step-1'
       name: 'Downgrade Kotlin'
-      uses: 'fwilhe2/setup-kotlin@v1'
+      uses: 'fwilhe2/setup-kotlin@v1.9'
       with:
         version: '2.3.21'
     - id: 'step-2'
@@ -199,7 +199,7 @@ jobs:
         cache: 'gradle'
     - id: 'step-2'
       name: 'Downgrade Kotlin'
-      uses: 'fwilhe2/setup-kotlin@v1'
+      uses: 'fwilhe2/setup-kotlin@v1.9'
       with:
         version: '2.3.21'
     - id: 'step-3'
diff --git a/.github/workflows/release.yaml b/.github/workflows/release.yaml
index 35f68905a..158b990f6 100644
--- a/.github/workflows/release.yaml
+++ b/.github/workflows/release.yaml
@@ -22,7 +22,7 @@ jobs:
       uses: 'actions/checkout@v7'
     - id: 'step-1'
       name: 'Downgrade Kotlin'
-      uses: 'fwilhe2/setup-kotlin@v1'
+      uses: 'fwilhe2/setup-kotlin@v1.9'
       with:
         version: '2.3.21'
     - id: 'step-2'