diff --git a/README.md b/README.md
index 1c62789..b56caa0 100644
--- a/README.md
+++ b/README.md
@@ -112,7 +112,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v6
 
     - name: Cache Primes
       id: cache-primes
@@ -143,7 +143,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v6
 
     - name: Restore cached Primes
       id: cache-primes-restore
@@ -251,7 +251,7 @@ Example:
 
 ```yaml
 steps:
-  - uses: actions/checkout@v4
+  - uses: actions/checkout@v6
 
   - uses: actions/cache@v4
     id: cache
@@ -281,7 +281,7 @@ jobs:
   build-linux:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - name: Cache Primes
         id: cache-primes
@@ -308,7 +308,7 @@ jobs:
   build-windows:
     runs-on: windows-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - name: Cache Primes
         id: cache-primes