diff --git a/.github/workflows/test-flakes-project.yml b/.github/workflows/test-flakes-project.yml
index 7255d60..41ab4a4 100644
--- a/.github/workflows/test-flakes-project.yml
+++ b/.github/workflows/test-flakes-project.yml
@@ -26,7 +26,7 @@ jobs:
       uses: actions/checkout@8ade135a41bc03ea155e62e844d188df1ea18608 # v4
 
     - name: Install Nix
-      uses: DeterminateSystems/nix-installer-action@65d7c888b2778e8cf30a07a88422ccb23499bfb8 # v4
+      uses: DeterminateSystems/nix-installer-action@07ebb8d2749aa2fac2baae7d1cfa011e4acfd8d1 # v5
 
     - name: Set up Magic Nix Cache
       uses: DeterminateSystems/magic-nix-cache-action@8a218f9e264e9c3803c9a1ee1c30d8e4ab55be63 # v2
diff --git a/.github/workflows/update-flake-lock.yml b/.github/workflows/update-flake-lock.yml
index 573291f..3a117f3 100644
--- a/.github/workflows/update-flake-lock.yml
+++ b/.github/workflows/update-flake-lock.yml
@@ -17,7 +17,7 @@ jobs:
         token: ${{ secrets.github-token }}
 
     - name: Install Nix
-      uses: DeterminateSystems/nix-installer-action@65d7c888b2778e8cf30a07a88422ccb23499bfb8 # v4
+      uses: DeterminateSystems/nix-installer-action@07ebb8d2749aa2fac2baae7d1cfa011e4acfd8d1 # v5
 
     - name: Update flake.lock and push
       shell: bash