diff --git a/CHANGES.md b/CHANGES.md
index f2deadfdb..f056ce6ed 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -1,5 +1,10 @@
 # Changes
 
+## 0.4.1 (2018-03-xx)
+
+* Fix Session mutable borrow lifetime
+
+
 ## 0.4.0 (2018-02-28)
 
 * Actix 0.5 compatibility
diff --git a/src/middleware/session.rs b/src/middleware/session.rs
index 7cdb7e093..e08ce03f2 100644
--- a/src/middleware/session.rs
+++ b/src/middleware/session.rs
@@ -86,7 +86,7 @@ impl<'a> Session<'a> {
     }
 
     /// Set a `value` from the session.
-    pub fn set<T: Serialize>(&'a mut self, key: &str, value: T) -> Result<()> {
+    pub fn set<T: Serialize>(&mut self, key: &str, value: T) -> Result<()> {
         self.0.set(key, serde_json::to_string(&value)?);
         Ok(())
     }