diff --git a/CHANGES b/CHANGES
index 6705a357b7f378abb6eccdd3d60abd0f60601833..fdd5f43cbb933dd2b663bee608318374d0d38f7e 100644
--- a/CHANGES
+++ b/CHANGES
@@ -2,6 +2,8 @@ Changes in version 2.12.0
 
  * Labeled URLs (e.g <http://example.net/ some label>)
 
+ * Improved memory usage (new dependency: deepseq)
+
 Changes in version 2.11.0
 
  * Show deprecation messages for identifiers