diff --git a/CCCongress Info Channels.md b/CCCongress Info Channels.md
index bb164e2..e8ae0ea 100644
--- a/CCCongress Info Channels.md	
+++ b/CCCongress Info Channels.md	
@@ -45,10 +45,9 @@ Many CCC Events record videos of the given lectures and some event offer live [s
 [c3cert]:https://twitter.com/c3cert "Chaos Emergency Response Team"
 [c3infodesk]:https://twitter.com/c3infodesk "Infodesk/Travelservice for CCC related events"
 [c3kidspace]:https://twitter.com/c3kidspace "C3 Kidspace"
-[c3lightning_tlk]:https://twitter.com/c3lightning_tlk "C3 lightning talks organisation"
+[c3_lightningtlk]:https://twitter.com/c3_lightningtlk "C3 lightning talks organisation"
 [c3lingo]:https://twitter.com/c3lingo "Translation and interpreter service"
 [c3noc]:https://twitter.com/c3noc "C3 network operation center"
-[c3poc]:https://twitter.com/c3poc "C3 phone operation center"
 [c3seidenstrasse]:https://twitter.com/c3seidenstrasse "C3 pneumatic tube transport system"
 [c3sidechannel]:https://twitter.com/c3sidechannel "C3 field phone service"
 [c3troc]:https://twitter.com/c3troc "C3 Train operation center"