diff --git a/GraphKit.podspec b/GraphKit.podspec
index ee84f1f..d5d2381 100644
--- a/GraphKit.podspec
+++ b/GraphKit.podspec
@@ -1,7 +1,7 @@
 
 Pod::Spec.new do |s|
   s.name         = "GraphKit"
-  s.version      = "1.1.0"
+  s.version      = "1.1.1"
   s.summary      = "A lightweight library of animated charts for iOS."
   s.homepage     = "https://github.com/michalkonturek/GraphKit"
   s.license      = 'MIT'
@@ -15,7 +15,7 @@ Pod::Spec.new do |s|
   s.social_media_url = 'https://twitter.com/michalkonturek'
   s.source       = { 
     :git => "https://github.com/michalkonturek/GraphKit.git", 
-    :tag => "1.1.0" 
+    :tag => s.version.to_s
   }
 
   s.source_files = 'Source/**/*.{h,m}'
diff --git a/Source/BarGraph/GKBarGraph.h b/Source/BarGraph/GKBarGraph.h
index 1e6c3f7..c3c3e52 100644
--- a/Source/BarGraph/GKBarGraph.h
+++ b/Source/BarGraph/GKBarGraph.h
@@ -32,7 +32,7 @@
 @property (nonatomic, assign) BOOL animated;
 @property (nonatomic, assign) CFTimeInterval animationDuration;
 
-@property (nonatomic, assign) id<GKBarGraphDataSource> dataSource;
+@property (nonatomic, weak) IBOutlet id<GKBarGraphDataSource> dataSource;
 
 @property (nonatomic, strong) NSArray *bars;
 @property (nonatomic, strong) NSArray *labels;
diff --git a/Source/LineGraph/GKLineGraph.h b/Source/LineGraph/GKLineGraph.h
index 6e592e9..3ec3761 100644
--- a/Source/LineGraph/GKLineGraph.h
+++ b/Source/LineGraph/GKLineGraph.h
@@ -32,7 +32,7 @@
 @property (nonatomic, assign) BOOL animated;
 @property (nonatomic, assign) CFTimeInterval animationDuration;
 
-@property (nonatomic, assign) id<GKLineGraphDataSource> dataSource;
+@property (nonatomic, weak) IBOutlet id<GKLineGraphDataSource> dataSource;
 
 @property (nonatomic, assign) CGFloat lineWidth;
 @property (nonatomic, assign) CGFloat margin;