diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 5cc26d6..7022792 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -16,7 +16,7 @@ jobs:
 
     steps:
       - uses: actions/checkout@v4
-      - uses: DeterminateSystems/nix-installer-action@v12
+      - uses: DeterminateSystems/nix-installer-action@v13
 
       # Evaluate the devshell here so that the time reported for subsequent
       # steps that use it reflect what is actually done there.
@@ -44,7 +44,7 @@ jobs:
 
     steps:
       - uses: actions/checkout@v4
-      - uses: DeterminateSystems/nix-installer-action@v12
+      - uses: DeterminateSystems/nix-installer-action@v13
 
       # Evaluate the devshell here so that the time reported for subsequent
       # steps that use it reflect what is actually done there.