diff --git a/voctopublish/tools/announcements.py b/voctopublish/tools/announcements.py
index 3731b97..01be769 100644
--- a/voctopublish/tools/announcements.py
+++ b/voctopublish/tools/announcements.py
@@ -21,7 +21,7 @@ def _replace_special_chars(maybe_string):
         "ü": "ue",
         "ẞ": "Ss",
     }.items():
-        string.replace(search, replace)
+        string = string.replace(search, replace)
     return sub(r"[^A-Za-z0-9]+", "", string)