diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6cce5b57..999967c9 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,9 @@
 All major and minor version changes will be documented in this file. Details of patch-level version changes can be found in [commit messages](https://github.com/gchq/CyberChef/commits/master).
 
 
+### [9.11.0] - 2019-11-06
+- Implemented CFB, OFB, and CTR modes for Blowfish operations [@cbeuw] | [#653]
+
 ### [9.10.0] - 2019-11-06
 - 'Lorenz' operation added [@VirtualColossus] | [#528]
 
@@ -194,6 +197,7 @@ All major and minor version changes will be documented in this file. Details of
 
 
 
+[9.11.0]: https://github.com/gchq/CyberChef/releases/tag/v9.11.0
 [9.10.0]: https://github.com/gchq/CyberChef/releases/tag/v9.10.0
 [9.9.0]: https://github.com/gchq/CyberChef/releases/tag/v9.9.0
 [9.8.0]: https://github.com/gchq/CyberChef/releases/tag/v9.8.0
@@ -276,6 +280,7 @@ All major and minor version changes will be documented in this file. Details of
 [@kassi]: https://github.com/kassi
 [@jarrodconnolly]: https://github.com/jarrodconnolly
 [@VirtualColossus]: https://github.com/VirtualColossus
+[@cbeuw]: https://github.com/cbeuw
 
 [#95]: https://github.com/gchq/CyberChef/pull/299
 [#173]: https://github.com/gchq/CyberChef/pull/173
@@ -337,4 +342,5 @@ All major and minor version changes will be documented in this file. Details of
 [#625]: https://github.com/gchq/CyberChef/pull/625
 [#627]: https://github.com/gchq/CyberChef/pull/627
 [#632]: https://github.com/gchq/CyberChef/pull/632
+[#653]: https://github.com/gchq/CyberChef/pull/653
 [#865]: https://github.com/gchq/CyberChef/pull/865