diff --git a/YYImage/YYImageCoder.m b/YYImage/YYImageCoder.m
index 66cf46e..f537e49 100644
--- a/YYImage/YYImageCoder.m
+++ b/YYImage/YYImageCoder.m
@@ -2561,6 +2561,7 @@ - (NSData *)_encodeAPNG {
             CFRelease(extendedImage);
             return nil;
         }
+        CFRelease(extendedImage);
         pngDatas[0] = (__bridge id)(frameData);
         CFRelease(frameData);
     }