diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index ad09694..764b555 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -5,7 +5,7 @@ jobs:
     name: Unit tests
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@0c366fd6a839edf440554fa01a7085ccba70ac98
       - uses: extractions/setup-just@e33e0265a09d6d736e2ee1e0eb685ef1de4669ff  # v3
       - uses: moonrepo/setup-rust@ede6de059f8046a5e236c94046823e2af11ca670 # v1.2.2
         with:
@@ -15,13 +15,13 @@ jobs:
     name: Integration test (& build all in dev-mode)
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@0c366fd6a839edf440554fa01a7085ccba70ac98
       - uses: ./.github/actions/setup-nix-direnv-rust
       - run: just test-integration
   lint:
     name: Lint & Style Check
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@0c366fd6a839edf440554fa01a7085ccba70ac98
       - uses: ./.github/actions/setup-nix-direnv-rust
       - run: just lint