diff --git a/webapp_hashtagswarm.py b/webapp_hashtagswarm.py
index a6dd2570..98d64dc5 100644
--- a/webapp_hashtagswarm.py
+++ b/webapp_hashtagswarm.py
@@ -201,8 +201,8 @@ def htmlHashTagSwarm(baseDir: str, actor: str, translate: {}) -> str:
for categoryStr in categorySwarm:
categorySwarmStr += \
'' + categoryStr + '\n'
- categorySwarmStr += '
\n'
+ '" class="hashtagswarm">' + categoryStr + '\n'
+ categorySwarmStr += '
\n'
# swarm of tags
tagSwarmStr = ''