diff --git a/.github/workflows/ci-build.yml b/.github/workflows/ci-build.yml
index d3e6acc..bfdd067 100644
--- a/.github/workflows/ci-build.yml
+++ b/.github/workflows/ci-build.yml
@@ -40,6 +40,8 @@ jobs:
  
     - name: 'Setup .NET SDK'
       uses: actions/setup-dotnet@87b7050bc53ea08284295505d98d2aa94301e852 # v4.2.0
+      with:
+        dotnet-version: 9.0.x
 
     - name: 'Restore external dependencies'
       run: dotnet restore
diff --git a/.github/workflows/ci-manual-build-test-sign.yml b/.github/workflows/ci-manual-build-test-sign.yml
index 4817025..d968c2f 100644
--- a/.github/workflows/ci-manual-build-test-sign.yml
+++ b/.github/workflows/ci-manual-build-test-sign.yml
@@ -45,6 +45,8 @@ jobs:
  
     - name: 'Setup .NET SDK'
       uses: actions/setup-dotnet@87b7050bc53ea08284295505d98d2aa94301e852 # v4.2.0
+      with:
+        dotnet-version: 9.0.x
 
     - name: 'Build'
       run: dotnet build --configuration Release --property:PublicRelease=${{ inputs.public_release }}
diff --git a/.github/workflows/codeql-analysis.yml b/.github/workflows/codeql-analysis.yml
index 7966862..28d0345 100644
--- a/.github/workflows/codeql-analysis.yml
+++ b/.github/workflows/codeql-analysis.yml
@@ -60,6 +60,8 @@ jobs:
 
     - name: 'Setup .NET SDK'
       uses: actions/setup-dotnet@87b7050bc53ea08284295505d98d2aa94301e852 # v4.2.0
+      with:
+        dotnet-version: 9.0.x
 
     # Initializes the CodeQL tools for scanning.
     - name: Initialize CodeQL