diff --git a/README.md b/README.md
index c39fa9650c1c1469a76fb5409c6cefc54cb72cea..c20fe070bbc24845582ce6d63317d6bed299fcc8 100644
--- a/README.md
+++ b/README.md
@@ -36,7 +36,7 @@ their discussion areas.
 * Representation of logical systems and their trnaslations via Theory Graphs: #5
 * Serious Games for Maths (based on logic and theory graphs): #1 #3
 * Semantics-Extraction from technical/mathematical documents (and the use of this in
-  [mathematical search engines](http//search.mathweb.org)); #2 
+  [mathematical search engines](http//search.mathweb.org)); #2 #6
 * [Integration of theorem prover libraries](http://kwarc.info/projects/OAF) (in the
   [MathHub System](http://mathhub.info)).
 * Active Dokuments and the integration of semantic services into technical/mathematical