diff --git a/docker/mailman/core/requirements.txt b/docker/mailman/core/requirements.txt
index 650d1c8a5d..b844e1a397 100644
--- a/docker/mailman/core/requirements.txt
+++ b/docker/mailman/core/requirements.txt
@@ -3,3 +3,6 @@
 # Dockerfile.
 mailman==3.3.7
 mailman-hyperkitty==1.2.0
+# mailman/config/config.py "from importlib_resources import path" ImportError
+# remove when https://gitlab.com/mailman/mailman/-/issues/1093 is solved
+importlib_resources<6