diff --git a/.github/workflows/build_app.yml b/.github/workflows/build_app.yml
index 2efce06..da2ff10 100644
--- a/.github/workflows/build_app.yml
+++ b/.github/workflows/build_app.yml
@@ -19,13 +19,13 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Clone Repository (Latest)
-        uses: actions/checkout@v3
+        uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac # v4
         with:
           repository: 'tachiyomiorg/tachiyomi'
           fetch-depth: 0
         if: github.event.inputs.git-ref == ''
       - name: Clone Repository (Custom Ref)
-        uses: actions/checkout@v3
+        uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac # v4
         if: github.event.inputs.git-ref != ''
         with:
           repository: 'tachiyomiorg/tachiyomi'