Update CHANGELOG.md

Author: zsdonghao

CHANGELOG.md

@@ -67,20 +67,38 @@ To release a new version, please update the changelog as followed:
 
 <!-- YOU CAN EDIT FROM HERE -->
 
-## [2.1.0] - 2019-5-25
-
-### Changed
-- change the format of network config, change related code and files; change layer act (PR #980)
+## [Unreleased]
 
 ### Added
 
+### Changed
+
 ### Dependencies Update
 
+### Deprecated
+
 ### Fixed
 
+### Removed
+
+### Security
+
 ### Contributors
-- @warshallrho: #PR980
 
+## [2.0.2] - 2019-6-5
+
+### Changed
+- change the format of network config, change related code and files; change layer act (PR #980)
+- update Seq2seq (#989) 
+
+### Fixed
+- Fix dynamic model cannot track PRelu weights gradients problem (#982)
+- Raise .weights warning
+
+### Contributors
+- @warshallrho: #PR980
+- @ArnoldLIULJ: #PR989
+- @1FengL 
 
 ## [2.0.1] - 2019-5-17
 
@@ -475,4 +493,4 @@ To many PR for this update, please check [here](https://github.com/tensorlayer/t
 [1.10.0]: https://github.com/tensorlayer/tensorlayer/compare/1.9.1...1.10.0
 [1.9.1]: https://github.com/tensorlayer/tensorlayer/compare/1.9.0...1.9.1
 [1.9.0]: https://github.com/tensorlayer/tensorlayer/compare/1.8.5...1.9.0
-[1.8.5]: https://github.com/tensorlayer/tensorlayer/compare/1.8.4...1.8.5
+[1.8.5]: https://github.com/tensorlayer/tensorlayer/compare/1.8.4...1.8.5