diff --git a/docs/simplesamlphp-changelog.txt b/docs/simplesamlphp-changelog.txt
index b0a658f489933fc743c484f931bf204a828e6011..d19f0190a89fc6fb3569b4ea2ae7678976efa7f4 100644
--- a/docs/simplesamlphp-changelog.txt
+++ b/docs/simplesamlphp-changelog.txt
@@ -6,6 +6,12 @@ simpleSAMLphp changelog
 This document lists the changes between versions of simpleSAMLphp.
 See the upgrade notes for specific information about upgrading.
 
+## Version 1.9.1
+
+Released 2012-08-02.
+
+  * Fix for a new attack against PKCS 1.5 in XML encryption.
+
 ## Version 1.9
 
 Released 2012-06-13.