diff --git a/.github/workflows/check.yml b/.github/workflows/check.yml
index f63452b7..6dd691ea 100644
--- a/.github/workflows/check.yml
+++ b/.github/workflows/check.yml
@@ -31,6 +31,8 @@ jobs:
 
     steps:
       - uses: actions/checkout@v4
+        with:
+          persist-credentials: false
 
       - uses: DeterminateSystems/nix-installer-action@v16
 
diff --git a/.github/workflows/docs.yml b/.github/workflows/docs.yml
index 666cc4b4..584d6aff 100644
--- a/.github/workflows/docs.yml
+++ b/.github/workflows/docs.yml
@@ -25,6 +25,8 @@ jobs:
 
     steps:
       - uses: actions/checkout@v4
+        with:
+          persist-credentials: false
 
       - uses: DeterminateSystems/nix-installer-action@v16