diff --git a/roles/docker/files/configs/matrix/homeserver.yaml.j2 b/roles/docker/files/configs/matrix/homeserver.yaml.j2
index aff4e2e..44c22c2 100644
--- a/roles/docker/files/configs/matrix/homeserver.yaml.j2
+++ b/roles/docker/files/configs/matrix/homeserver.yaml.j2
@@ -343,6 +343,7 @@ database:
     port: "5432"
     cp_min: 5
     cp_max: 10
+  allow_unsafe_locale: true
 
 # Number of events to cache in memory.
 event_cache_size: "10K"