diff --git a/.github/workflows/nix-integration-test.yml b/.github/workflows/nix-integration-test.yml
index 83e2136..0b429d9 100644
--- a/.github/workflows/nix-integration-test.yml
+++ b/.github/workflows/nix-integration-test.yml
@@ -13,5 +13,5 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
-      - uses: DeterminateSystems/nix-installer-action@21a544727d0c62386e78b4befe52d19ad12692e3 # v17
+      - uses: DeterminateSystems/nix-installer-action@90bb610b90bf290cad97484ba341453bd1cbefea # v19
       - run: nix flake check
diff --git a/.github/workflows/update-flake-lock.yml b/.github/workflows/update-flake-lock.yml
index 3ce067f..b07d217 100644
--- a/.github/workflows/update-flake-lock.yml
+++ b/.github/workflows/update-flake-lock.yml
@@ -14,6 +14,6 @@ jobs:
       - uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
         with:
           ssh-key: ${{ secrets.UPDATE_FLAKE_LOCK_SSH_KEY }}
-      - uses: DeterminateSystems/nix-installer-action@21a544727d0c62386e78b4befe52d19ad12692e3 # v17
+      - uses: DeterminateSystems/nix-installer-action@90bb610b90bf290cad97484ba341453bd1cbefea # v19
       - name: Update flake.lock
         uses: DeterminateSystems/update-flake-lock@428c2b58a4b7414dabd372acb6a03dba1084d3ab # v25