diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index 647d849..d2f5ae6 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -17,7 +17,7 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v3
       - name: Install Nix
-        uses: cachix/install-nix-action@v17
+        uses: cachix/install-nix-action@v20
         with:
           github_access_token: ${{ secrets.GITHUB_TOKEN }}
       - name: Prepare devShell
@@ -44,7 +44,7 @@ jobs:
         uses: actions/checkout@v3
       # For builtins.
       - name: Install Nix
-        uses: cachix/install-nix-action@v17
+        uses: cachix/install-nix-action@v20
         with:
           github_access_token: ${{ secrets.GITHUB_TOKEN }}
       - name: Install Rust
@@ -68,7 +68,7 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v3
       - name: Install Nix
-        uses: cachix/install-nix-action@v17
+        uses: cachix/install-nix-action@v20
         with:
           github_access_token: ${{ secrets.GITHUB_TOKEN }}
       - name: Flake update
@@ -97,7 +97,7 @@ jobs:
         with:
           fetch-depth: 0
       - name: Install Nix
-        uses: cachix/install-nix-action@v17
+        uses: cachix/install-nix-action@v20
         with:
           nix_path: nixpkgs=channel:nixpkgs-unstable
           github_access_token: ${{ secrets.GITHUB_TOKEN }}