diff --git a/.github/workflows/evm-foundry-ci.yml b/.github/workflows/evm-foundry-ci.yml
index ee56fa0..be7c9b8 100644
--- a/.github/workflows/evm-foundry-ci.yml
+++ b/.github/workflows/evm-foundry-ci.yml
@@ -13,12 +13,12 @@ jobs:
     env:
       RPC_URL: ${{ secrets.ETH_RPC_URL }}
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683
         with:
           submodules: recursive
 
       - name: Install Foundry
-        uses: foundry-rs/foundry-toolchain@v1
+        uses: foundry-rs/foundry-toolchain@de808b1eea699e761c404bda44ba8f21aba30b2c
 
       - name: Check formatting
         run: forge fmt --check
diff --git a/.github/workflows/slither.yml b/.github/workflows/slither.yml
index 4134b29..dc18ce8 100644
--- a/.github/workflows/slither.yml
+++ b/.github/workflows/slither.yml
@@ -10,8 +10,8 @@ jobs:
   analyze:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
-      - uses: crytic/slither-action@v0.4.0
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683
+      - uses: crytic/slither-action@f197989dea5b53e986d0f88c60a034ddd77ec9a8
         with:
           target: 'foundry/'
-          slither-args: '--filter-paths foundry/lib/'
\ No newline at end of file
+          slither-args: '--filter-paths foundry/lib/'
diff --git a/.github/workflows/tests-and-lints-template.yaml b/.github/workflows/tests-and-lints-template.yaml
index 12cd28a..947695d 100644
--- a/.github/workflows/tests-and-lints-template.yaml
+++ b/.github/workflows/tests-and-lints-template.yaml
@@ -92,7 +92,7 @@ jobs:
       - name: Checkout
         uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683
         with:
-          ref: ${{ github.head_ref }}
+          ref: ${{ github.event_name == 'pull_request' && format('refs/pull/{0}/head', github.event.pull_request.number) || github.ref }}
 
       - name: Setup git to use https
         run: |