diff --git a/History.markdown b/History.markdown
index 5d2727b1..59870b01 100644
--- a/History.markdown
+++ b/History.markdown
@@ -3,6 +3,7 @@
 ### Documentation
 
   * Update reference to trouble with OS X/macOS (#6139)
+  * added BibSonomy plugin (#6143)
 
 ## 3.5.0 / 2017-06-18