diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 20e532c..47637df 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -15,8 +15,8 @@ jobs:
       id-token: write # Required for the attestations step
       attestations: write # Required for the attestations step
     steps:
-      - uses: actions/checkout@v6
-      - uses: actions/setup-java@v5
+      - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
+      - uses: actions/setup-java@f2beeb24e141e01a676f977032f5a29d81c9e27e # v5.1.0
         with:
           distribution: 'temurin'
           java-version: ${{ env.JAVA_VERSION }}
@@ -28,12 +28,12 @@ jobs:
         run: mvn -B verify --no-transfer-progress
       - name: Attest
         if: startsWith(github.ref, 'refs/tags/')
-        uses: actions/attest-build-provenance@v3
+        uses: actions/attest-build-provenance@00014ed6ed5efc5b1ab7f7f34a39eb55d41aa4f8 # v3.1.0
         with:
           subject-path: |
             target/*.jar
             target/*.pom
-      - uses: actions/upload-artifact@v6
+      - uses: actions/upload-artifact@b7c566a772e6b6bfb58ed0dc250532a479d7789f # v6.0.0
         with:
           name: artifacts
           path: target/*.jar
@@ -45,8 +45,8 @@ jobs:
     needs: [build]
     if: github.repository_owner == 'cryptomator' && (startsWith(github.ref, 'refs/tags/') || contains(github.event.head_commit.message, '[deploy]'))
     steps:
-      - uses: actions/checkout@v6
-      - uses: actions/setup-java@v5
+      - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
+      - uses: actions/setup-java@f2beeb24e141e01a676f977032f5a29d81c9e27e # v5.1.0
         with:
           distribution: 'temurin'
           java-version: ${{ env.JAVA_VERSION }}
@@ -79,8 +79,8 @@ jobs:
     needs: [build]
     if: github.repository_owner == 'cryptomator' && (startsWith(github.ref, 'refs/tags/') || contains(github.event.head_commit.message, '[deploy]'))
     steps:
-      - uses: actions/checkout@v6
-      - uses: actions/setup-java@v5
+      - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
+      - uses: actions/setup-java@f2beeb24e141e01a676f977032f5a29d81c9e27e # v5.1.0
         with:
           java-version: ${{ env.JAVA_VERSION }}
           distribution: 'temurin'
@@ -110,7 +110,7 @@ jobs:
     if: startsWith(github.ref, 'refs/tags/')
     steps:
       - name: Create Release
-        uses: softprops/action-gh-release@v2
+        uses: softprops/action-gh-release@a06a81a03ee405af7f2048a818ed3f03bbf83c7b # v2.5.0
         with:
           prerelease: true
           token: ${{ secrets.CRYPTOBOT_RELEASE_TOKEN }}
diff --git a/.github/workflows/codeql-analysis.yml b/.github/workflows/codeql-analysis.yml
index 8fe0f3d..dc28d12 100644
--- a/.github/workflows/codeql-analysis.yml
+++ b/.github/workflows/codeql-analysis.yml
@@ -16,19 +16,19 @@ jobs:
     # dependeabot has on push events only read-only access, but codeql requires write access
     if: ${{ !(github.actor == 'dependabot[bot]' && contains(fromJSON('["push"]'), github.event_name)) }}
     steps:
-    - uses: actions/checkout@v6
+    - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
       with:
         fetch-depth: 2
-    - uses: actions/setup-java@v5
+    - uses: actions/setup-java@f2beeb24e141e01a676f977032f5a29d81c9e27e # v5.1.0
       with:
         distribution: 'temurin'
         java-version: 25
         cache: 'maven'
     - name: Initialize CodeQL
-      uses: github/codeql-action/init@v4
+      uses: github/codeql-action/init@5d4e8d1aca955e8d8589aabd499c5cae939e33c7 # v4.31.9
       with:
         languages: java
     - name: Build
       run: mvn -B test
     - name: Perform CodeQL Analysis
-      uses: github/codeql-action/analyze@v4
\ No newline at end of file
+      uses: github/codeql-action/analyze@5d4e8d1aca955e8d8589aabd499c5cae939e33c7 # v4.31.9
\ No newline at end of file
diff --git a/.github/workflows/dependency-check.yml b/.github/workflows/dependency-check.yml
index 3c1ac2f..8e38f2a 100644
--- a/.github/workflows/dependency-check.yml
+++ b/.github/workflows/dependency-check.yml
@@ -11,7 +11,7 @@ on:
 
 jobs:
   check-dependencies:
-    uses: skymatic/workflows/.github/workflows/run-dependency-check.yml@v3
+    uses: skymatic/workflows/.github/workflows/run-dependency-check.yml@2d0c27a7b04c605afe1ca85e37c0e86517defcc9 # v3.0.2
     with:
       runner-os: 'ubuntu-latest'
       java-distribution: 'temurin'
diff --git a/.github/workflows/pullrequest.yml b/.github/workflows/pullrequest.yml
index da67ff3..f8ab9b5 100644
--- a/.github/workflows/pullrequest.yml
+++ b/.github/workflows/pullrequest.yml
@@ -16,8 +16,8 @@ jobs:
     name: Compile and Test
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v6
-      - uses: actions/setup-java@v5
+      - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
+      - uses: actions/setup-java@f2beeb24e141e01a676f977032f5a29d81c9e27e # v5.1.0
         with:
           distribution: ${{ env.JAVA_DIST }}
           java-version: ${{ env.JAVA_VERSION }}
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0e4f067..69be9a7 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -14,6 +14,7 @@ Changes to prior versions can be found on the [Github release page](https://gith
 
 ### Changed
 * Require JDK 25
+* Pin GitHub action versions used in CI ([#132](https://github.com/cryptomator/integrations-linux/pull/132))
 * Updated dependency `com.fasterxml.jackson.core:jackson-databind` from 2.20.0 to 2.20.1
 
 ## [1.6.1](https://github.com/cryptomator/integrations-linux/releases/tag/1.6.1) - 2025-09-17