diff --git a/CHANGELOG.md b/CHANGELOG.md
index 290d375..dd88d8b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,6 @@
+## 1.1.5
+- Remove callback observer when deinit in iOS [#16](https://github.com/flutter-moum/flutter_screenshot_callback/issues/16).
+
 ## 1.1.4
 - Fix iOS Build Error [#31](https://github.com/flutter-moum/flutter_screenshot_callback/issues/31).
 
diff --git a/example/pubspec.lock b/example/pubspec.lock
index 6cac357..c5d0564 100644
--- a/example/pubspec.lock
+++ b/example/pubspec.lock
@@ -108,7 +108,7 @@ packages:
       path: ".."
       relative: true
     source: path
-    version: "1.1.4"
+    version: "1.1.5"
   sky_engine:
     dependency: transitive
     description: flutter
diff --git a/ios/Classes/SwiftScreenshotCallbackPlugin.swift b/ios/Classes/SwiftScreenshotCallbackPlugin.swift
index 34d21ae..137a0e7 100644
--- a/ios/Classes/SwiftScreenshotCallbackPlugin.swift
+++ b/ios/Classes/SwiftScreenshotCallbackPlugin.swift
@@ -45,10 +45,10 @@ public class SwiftScreenshotCallbackPlugin: NSObject, FlutterPlugin {
     }
   }
     
-    deinit {
-        if(SwiftScreenshotCallbackPlugin.observer != nil) {
-            NotificationCenter.default.removeObserver(SwiftScreenshotCallbackPlugin.observer!);
-            SwiftScreenshotCallbackPlugin.observer = nil;
-        }
-    }
+  deinit {
+      if(SwiftScreenshotCallbackPlugin.observer != nil) {
+          NotificationCenter.default.removeObserver(SwiftScreenshotCallbackPlugin.observer!);
+          SwiftScreenshotCallbackPlugin.observer = nil;
+      }
+  }
 }
diff --git a/pubspec.yaml b/pubspec.yaml
index 2996f8b..c37b05e 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,6 +1,6 @@
 name: screenshot_callback
 description: Flutter plugin that allows you to detect mobile screenshot and execute callback functions on iOS and Android.
-version: 1.1.4
+version: 1.1.5
 homepage: https://github.com/flutter-moum/flutter_screenshot_callback
 
 environment: