diff --git a/pyobs/comm/xmpp/xmppcomm.py b/pyobs/comm/xmpp/xmppcomm.py
index de366819..9034919b 100644
--- a/pyobs/comm/xmpp/xmppcomm.py
+++ b/pyobs/comm/xmpp/xmppcomm.py
@@ -371,7 +371,7 @@ async def _got_online(self, msg: Any) -> None:
 
         # if no interfaces are implemented (not even IModule), quit here
         if len(interface_names) == 0:
-            module = jid[: jid.index["@"]]
+            module = jid[: jid.index("@")]
             log.error(f"Module {module} does not seem to implement IModule, ignoring.")
             return
 
diff --git a/pyproject.toml b/pyproject.toml
index 42a84bfd..26da42f3 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,7 +1,7 @@
 [tool.poetry]
 name = "pyobs-core"
 packages = [{ include = "pyobs" }]
-version = "1.12.5"
+version = "1.12.6"
 description = "robotic telescope software"
 authors = ["Tim-Oliver Husser <thusser@uni-goettingen.de>"]
 license = "MIT"