diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index 99508cc..a4fa0e7 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -32,25 +32,25 @@ jobs:
 
     steps:
       - name: Checkout Project
-        uses: actions/checkout@v4
+        uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
 
       - name: Validate Gradle Wrapper
-        uses: gradle/wrapper-validation-action@v2
+        uses: gradle/wrapper-validation-action@699bb18358f12c5b78b37bb0111d3a0e2276e0e2 # v2.1.1
 
-      - uses: actions/cache@v4
+      - uses: actions/cache@ab5e6d0c87105b4c9c2047343972218f562e4319 # v4.0.1
         with:
           path: |
             ~/.konan
           key: ${{ runner.os }}-${{ hashFiles('**/.lock') }}
 
       - name: Setup JDK
-        uses: actions/setup-java@v4
+        uses: actions/setup-java@9704b39bf258b59bc04b50fa2dd55e9ed76b47a8 # v4.1.0
         with:
           distribution: temurin
           java-version: 8
 
       - name: Setup Gradle
-        uses: gradle/actions/setup-gradle@v3
+        uses: gradle/actions/setup-gradle@417ae3ccd767c252f5661f1ace9f835f9654f2b5 # v3.1.0
 
       - name: Build with Gradle Wrapper
         run: ./gradlew ${{ matrix.tasks }}
@@ -105,25 +105,25 @@ jobs:
 
     steps:
       - name: Checkout Project
-        uses: actions/checkout@v4
+        uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
 
       - name: Validate Gradle Wrapper
-        uses: gradle/wrapper-validation-action@v2
+        uses: gradle/wrapper-validation-action@699bb18358f12c5b78b37bb0111d3a0e2276e0e2 # v2.1.1
 
-      - uses: actions/cache@v4
+      - uses: actions/cache@ab5e6d0c87105b4c9c2047343972218f562e4319 # v4.0.1
         with:
           path: |
             ~/.konan
           key: ${{ runner.os }}-${{ hashFiles('**/.lock') }}
 
       - name: Setup JDK
-        uses: actions/setup-java@v4
+        uses: actions/setup-java@9704b39bf258b59bc04b50fa2dd55e9ed76b47a8 # v4.1.0
         with:
           distribution: temurin
           java-version: 8
 
       - name: Setup Gradle
-        uses: gradle/actions/setup-gradle@v3
+        uses: gradle/actions/setup-gradle@417ae3ccd767c252f5661f1ace9f835f9654f2b5 # v3.1.0
 
       - name: Publish with Gradle Wrapper
         run: ./gradlew ${{ matrix.tasks }}