diff --git a/zulip/integrations/bridge_with_irc/requirements.txt b/zulip/integrations/bridge_with_irc/requirements.txt
index 33118c1..cb7fdec 100644
--- a/zulip/integrations/bridge_with_irc/requirements.txt
+++ b/zulip/integrations/bridge_with_irc/requirements.txt
@@ -1 +1 @@
-irc>=16.0
+irc>=16.4