diff --git a/spec/22/index.yaml b/spec/22/index.yaml
index b17685a..711f3de 100644
--- a/spec/22/index.yaml
+++ b/spec/22/index.yaml
@@ -15,6 +15,7 @@ links:
   substack: https://utxoprague.substack.com/
   instagram: https://www.instagram.com/utxoprague/
   youtube: https://www.youtube.com/channel/UCXLBCW1pstQPQf-4zRESepA
+  tawk: https://tawk.to/utxoprague
 schemaVersion: 1
 specDef:
   - type: speakers
diff --git a/spec/22/photos/speakers/vojtch-twitter.jpg b/spec/22/photos/speakers/vojtch-twitter.jpg
index a26ce15..ad3e54e 100644
Binary files a/spec/22/photos/speakers/vojtch-twitter.jpg and b/spec/22/photos/speakers/vojtch-twitter.jpg differ