diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3b14722..d1d97f5 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,22 @@
+# Changelog
+
+## 3.1.0 (2017-11-14)
+- Added class `ZipModel` for all changes.
+- All manipulations with incoming and outgoing streams are in separate files: `ZipInputStream` and `ZipOutputStream`.
+- Removed class `CentralDirectory`.
+- Optimized extra fields classes.
+- Fixed issue #4 (`count()` returns 0 when files are added in directories).
+- Implemented issue #8 - support inline Content-Disposition and empty output filename.
+- Optimized and tested on a php 32-bit platform (issue #5).
+- Added output as PSR-7 Response.
+- Added methods for canceling changes.
+- Added [russian documentation](README.RU.md).
+- Updated [documentation](README.md).
+- Declared deprecated methods:
+  + rename `ZipFile::withReadPassword` to `ZipFile::setReadPassword`
+  + rename `ZipFile::withNewPassword` to `ZipFile::setPassword`
+  + rename `ZipFile::withoutPassword` to `ZipFile::disableEncryption`
+
 ## 3.0.3 (2017-11-11)
 Fix bug issue #8 - Error if the file is empty.
 
diff --git a/README.RU.md b/README.RU.md
index 379091c..692350f 100644
--- a/README.RU.md
+++ b/README.RU.md
@@ -32,6 +32,7 @@
   + [Сохранение файла или вывод в браузер](#Documentation-Save-Or-Output-Entries)
   + [Закрытие архива](#Documentation-Close-Zip-Archive)
 - [Запуск тестов](#Running-Tests)
+- [История изменений](#Changelog)
 - [Обновление версий](#Upgrade)
   + [Обновление с версии 2 до версии 3.0](#Upgrade-v2-to-v3)
 
@@ -779,6 +780,8 @@ composer install --dev
 ```bash
 vendor/bin/phpunit -v -c phpunit.xml
 ```
+### <a name="Changelog"></a> История изменений
+[Ссылка на Changelog](CHANGELOG.md)
 ### <a name="Upgrade"></a> Обновление версий
 #### <a name="Upgrade-v2-to-v3"></a> Обновление с версии 2 до версии 3.0
 Обновите мажорную версию в файле `composer.json` до `^3.0`.
diff --git a/README.md b/README.md
index eed4546..3cde2b5 100644
--- a/README.md
+++ b/README.md
@@ -32,6 +32,7 @@ Table of contents
   + [Saving a file or output to a browser](#Documentation-Save-Or-Output-Entries)
   + [Closing the archive](#Documentation-Close-Zip-Archive)
 - [Running the tests](#Running-Tests)
+- [Changelog](#Changelog)
 - [Upgrade](#Upgrade)
   + [Upgrade version 2 to version 3.0](#Upgrade-v2-to-v3)
 
@@ -778,6 +779,9 @@ Run the tests:
 ```bash
 vendor/bin/phpunit -v -c phpunit.xml
 ```
+### <a name="Changelog"></a> Changelog
+[Link to Changelog](CHANGELOG.md)
+
 ### <a name="Upgrade"></a> Upgrade
 #### <a name="Upgrade-v2-to-v3"></a> Upgrade version 2 to version 3.0
 Update the major version in the file `composer.json` to `^3.0`.