diff --git a/.aspell.en.pws b/.aspell.en.pws
index ff9741fc9..d84b2a54b 100644
--- a/.aspell.en.pws
+++ b/.aspell.en.pws
@@ -483,6 +483,7 @@ WEIBULL
 wget
 WinXp
 wmf
+WOPI
 WrapText
 xfIndexNumber
 xls
diff --git a/CHANGELOG.md b/CHANGELOG.md
index bf409a311..56e9a2e07 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,63 @@
 # Change log
 
+## 6.4.0
+
+### New Features
+
+### All Editors
+
+* Add support of Web Application Open Platform Interface (WOPI) protocol
+* Major improvements in support of chart styles
+* Ability to Resolve all comments
+* Change list symbols render
+* Add chart styles for users with visual impairment
+* Add ability to use tab\shift+tab in some controls
+* Add 125% and 175% interface scale
+* Ability to set theme by config
+* Ability to set user permissions for comment mode
+* Ability to view unique user link count on info page
+* Ability to force co-edit mode via config
+* Improved render of CJK fonts in PDF files
+
+### Document Editor
+
+* Ability to convert text to table
+* Ability to convert table to text
+* Auto-capitalize first letter
+* New review mode: Simple markup
+
+### Spreadsheet Editor
+
+* Ability to add/remove/edit conditional formatting
+* Ability to add sparklines
+* Change select by pressing `tab` + `enter`
+* Data import from txt, csv
+* Ability to run macros on mouse click over graphic object
+* A lot new languages for formulas description (Belarusian, Bulgarian,
+  Catalan, Chinese, Czech, Danish, Dutch, Finnish, Greek,
+  Hungarian, Indonesian, Japanese, Korean, Lao, Latvian,
+  Norwegian, Polish, Portuguese, Romanian, Slovak,
+  Slovenian, Swedish, Turkish, Ukrainian, Vietnamese)
+* Add setting for hyperlink auto-correction
+* Freeze panes presets
+* Setting for `show zeros` in cells
+* Chain comments support
+* Add argument names to function wizard
+
+#### Presentation Editor
+
+* Version History
+* Ability to hide notes panel
+* Auto-capitalize first letter
+
+#### Mobile Editors
+
+* Mobile web editors completely rewritten on React
+
+### Fixes
+
+* All components received countless fixes
+
 ## 6.3.2
 
 ### Fixes