diff --git a/.github/workflows/lint.yml b/.github/workflows/lint.yml
index 629396986..d7a16ccb4 100644
--- a/.github/workflows/lint.yml
+++ b/.github/workflows/lint.yml
@@ -79,7 +79,7 @@ jobs:
       - name: Install Rust
         uses: actions-rust-lang/setup-rust-toolchain@v1.8.0
         with:
-          toolchain: nightly-2024-04-26
+          toolchain: nightly-2024-06-07
 
       - name: Install cargo-public-api
         uses: taiki-e/install-action@v2.34.0
diff --git a/actix-web/src/app.rs b/actix-web/src/app.rs
index 1a3b79086..3d86d1f9b 100644
--- a/actix-web/src/app.rs
+++ b/actix-web/src/app.rs
@@ -112,8 +112,8 @@ where
     /// })
     /// ```
     #[doc(alias = "manage")]
-    pub fn app_data<U: 'static>(mut self, ext: U) -> Self {
-        self.extensions.insert(ext);
+    pub fn app_data<U: 'static>(mut self, data: U) -> Self {
+        self.extensions.insert(data);
         self
     }