diff --git a/.github/workflows/build-on-PR.yaml b/.github/workflows/build-on-PR.yaml
index 2f69c91..329afa8 100644
--- a/.github/workflows/build-on-PR.yaml
+++ b/.github/workflows/build-on-PR.yaml
@@ -7,12 +7,12 @@ jobs:
         version: [8, 11]
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
-    - uses: actions/setup-java@v3
+    - uses: actions/checkout@f43a0e5ff2bd294095638e18286ca9a3d1956744 # v3.6.0
+    - uses: actions/setup-java@17f84c3641ba7b8f6deff6309fc4c864478f5d62 # v3.14.1
       with:
         java-version: ${{ matrix.version }}
         distribution: corretto
-    - uses: eskatos/gradle-command-action@v2
+    - uses: eskatos/gradle-command-action@a8f75513eafdebd8141bd1cd4e30fcd194af8dfa # v2.12.0
       with:
         gradle-version: 6.1.1
         arguments: test --info
diff --git a/.github/workflows/build-on-main.yaml b/.github/workflows/build-on-main.yaml
index b7074e6..2613ce0 100644
--- a/.github/workflows/build-on-main.yaml
+++ b/.github/workflows/build-on-main.yaml
@@ -10,12 +10,12 @@ jobs:
         version: [8, 11]
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
-    - uses: actions/setup-java@v3
+    - uses: actions/checkout@f43a0e5ff2bd294095638e18286ca9a3d1956744 # v3.6.0
+    - uses: actions/setup-java@17f84c3641ba7b8f6deff6309fc4c864478f5d62 # v3.14.1
       with:
         java-version: ${{ matrix.version }}
         distribution: 'temurin'
-    - uses: eskatos/gradle-command-action@v2
+    - uses: eskatos/gradle-command-action@a8f75513eafdebd8141bd1cd4e30fcd194af8dfa # v2.12.0
       with:
         gradle-version: 6.1.1
         arguments: test --info
diff --git a/.github/workflows/codeql-analysis.yml b/.github/workflows/codeql-analysis.yml
index c9e3e48..e6c9404 100644
--- a/.github/workflows/codeql-analysis.yml
+++ b/.github/workflows/codeql-analysis.yml
@@ -25,11 +25,11 @@ jobs:
 
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v3
+      uses: actions/checkout@f43a0e5ff2bd294095638e18286ca9a3d1956744 # v3.6.0
 
     # Initializes the CodeQL tools for scanning.
     - name: Initialize CodeQL
-      uses: github/codeql-action/init@v2
+      uses: github/codeql-action/init@b8d3b6e8af63cde30bdc382c0bc28114f4346c88 # v2.28.1
       with:
         languages: ${{ matrix.language }}
         # If you wish to specify custom queries, you can do so here or in a config file.
@@ -40,7 +40,7 @@ jobs:
     # Autobuild attempts to build any compiled languages  (C/C++, C#, or Java).
     # If this step fails, then you should remove it and run the build manually (see below)
     - name: Autobuild
-      uses: github/codeql-action/autobuild@v2
+      uses: github/codeql-action/autobuild@b8d3b6e8af63cde30bdc382c0bc28114f4346c88 # v2.28.1
 
     - name: Perform CodeQL Analysis
-      uses: github/codeql-action/analyze@v2
+      uses: github/codeql-action/analyze@b8d3b6e8af63cde30bdc382c0bc28114f4346c88 # v2.28.1