diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 2c1d6a4..3c3fb96 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -7,7 +7,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v3.0.2
-    - uses: cachix/install-nix-action@v17
+    - uses: cachix/install-nix-action@v20
     - uses: cachix/cachix-action@v10
       with:
         name: nix-getting-started-template
diff --git a/.github/workflows/update-niv.yml b/.github/workflows/update-niv.yml
index 3491f9a..10f08f1 100644
--- a/.github/workflows/update-niv.yml
+++ b/.github/workflows/update-niv.yml
@@ -10,7 +10,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v3.0.2
-    - uses: cachix/install-nix-action@v17
+    - uses: cachix/install-nix-action@v20
     # https://github.com/nmattia/niv/issues/280
     - run: GITHUB_PATH= nix-shell --run "niv update"
     - uses: cachix/cachix-action@v10