diff --git a/.github/workflows/build-and-cache.yml b/.github/workflows/build-and-cache.yml
index e5aa0dd4..df67d8c3 100644
--- a/.github/workflows/build-and-cache.yml
+++ b/.github/workflows/build-and-cache.yml
@@ -7,7 +7,7 @@ jobs:
           swap-storage: false
           tool-cache: true
       - uses: actions/checkout@v4
-      - uses: cachix/install-nix-action@v23
+      - uses: cachix/install-nix-action@v26
         with:
           extra_nix_config: |-
             accept-flake-config = true
@@ -32,7 +32,7 @@ jobs:
     runs-on: macos-13
     steps:
       - uses: actions/checkout@v4
-      - uses: cachix/install-nix-action@v23
+      - uses: cachix/install-nix-action@v26
         with:
           extra_nix_config: |-
             accept-flake-config = true
diff --git a/.github/workflows/update-flakes-darwin.yml b/.github/workflows/update-flakes-darwin.yml
index 918a4551..72e18f8f 100644
--- a/.github/workflows/update-flakes-darwin.yml
+++ b/.github/workflows/update-flakes-darwin.yml
@@ -4,7 +4,7 @@ jobs:
     runs-on: macos-13
     steps:
       - uses: actions/checkout@v4
-      - uses: cachix/install-nix-action@v23
+      - uses: cachix/install-nix-action@v26
         with:
           extra_nix_config: |-
             accept-flake-config = true
diff --git a/.github/workflows/update-flakes.yml b/.github/workflows/update-flakes.yml
index b985c0bc..06439513 100644
--- a/.github/workflows/update-flakes.yml
+++ b/.github/workflows/update-flakes.yml
@@ -7,7 +7,7 @@ jobs:
           swap-storage: false
           tool-cache: true
       - uses: actions/checkout@v4
-      - uses: cachix/install-nix-action@v23
+      - uses: cachix/install-nix-action@v26
         with:
           extra_nix_config: |-
             accept-flake-config = true
diff --git a/.github/workflows/validate-flakes.yml b/.github/workflows/validate-flakes.yml
index a64f9fda..0c60bb43 100644
--- a/.github/workflows/validate-flakes.yml
+++ b/.github/workflows/validate-flakes.yml
@@ -8,7 +8,7 @@ jobs:
           DEBIAN_FRONTEND=noninteractive
           sudo apt-get update -q -y
           sudo apt-get install -q -y binfmt-support qemu-efi qemu-system-aarch64 qemu-user-static
-      - uses: cachix/install-nix-action@v23
+      - uses: cachix/install-nix-action@v26
         with:
           extra_nix_config: |-
             accept-flake-config = true
diff --git a/actions/constants.nix b/actions/constants.nix
index ef3be44e..9e07d910 100644
--- a/actions/constants.nix
+++ b/actions/constants.nix
@@ -4,7 +4,7 @@
     checkout = "actions/checkout@v4";
     create-pull-request = "peter-evans/create-pull-request@v6";
     free-disk-space = "jlumbroso/free-disk-space@v1.3.1";
-    install-nix-action = "cachix/install-nix-action@v23";
+    install-nix-action = "cachix/install-nix-action@v26";
   };
   ubuntu.runs-on = "ubuntu-latest";
   macos.runs-on = "macos-13";