diff --git a/README.md b/README.md
index b0e14e0..44a3c8f 100644
--- a/README.md
+++ b/README.md
@@ -181,7 +181,7 @@ jobs:
       - uses: actions/setup-go@v4
         with:
           go-version: "1.20"
-          cache-key-prefix: build-cache-
+          cache-key-prefix: build-cache
       - run: go build
   test:
     runs-on: ubuntu-latest
@@ -190,7 +190,7 @@ jobs:
       - uses: actions/setup-go@v4
         with:
           go-version: "1.20"
-          cache-key-prefix: test-cache-
+          cache-key-prefix: test-cache
       - run: go test ./...
 ```
 
diff --git a/action.yml b/action.yml
index 3633fc2..5744d8b 100644
--- a/action.yml
+++ b/action.yml
@@ -19,6 +19,7 @@ inputs:
     description: 'Used to specify the path to a dependency file - go.sum'
   cache-key-prefix:
     description: 'A prefix to add to the cache key. Useful if you have multiple concurrent jobs that need different caches.'
+    default: 'setup-go'
   architecture:
     description: 'Target architecture for Go to use. Examples: x86, x64. Will use system architecture by default.'
 outputs: