diff --git a/README.md b/README.md
index 1380415..c450461 100644
--- a/README.md
+++ b/README.md
@@ -101,13 +101,8 @@ If you want to control when the cache is invalidated, specify a glob pattern wit
 `cache-dependency-glob` input. The cache will be invalidated if any file matching the glob pattern
 changes. The glob matches files relative to the repository root.
 
-```yaml
-- name: Define a cache dependency glob
-  uses: astral-sh/setup-uv@v2
-  with:
-    enable-cache: true
-    cache-dependency-glob: "uv.lock"
-```
+> [!NOTE]
+> The default is `**/uv.lock`.
 
 ```yaml
 - name: Define a cache dependency glob
@@ -127,6 +122,14 @@ changes. The glob matches files relative to the repository root.
       **pyproject.toml
 ```
 
+```yaml
+- name: Never invalidate the cache
+  uses: astral-sh/setup-uv@v2
+  with:
+    enable-cache: true
+    cache-dependency-glob: ""
+```
+
 ### Local cache path
 
 This action controls where `uv` stores its cache on the runner's filesystem.
diff --git a/action.yml b/action.yml
index 2a383f3..45b7690 100644
--- a/action.yml
+++ b/action.yml
@@ -20,8 +20,8 @@ inputs:
   cache-dependency-glob:
     description:
       'Glob pattern to match files relative to the repository root to control
-      the cache. e.g. "uv.lock"'
-    required: false
+      the cache.'
+    default: "**/uv.lock"
   cache-suffix:
     description: "Suffix for the cache key"
     required: false