diff --git a/cave_data/1623-291.html b/cave_data/1623-291.html
index 99f4ad578..702524625 100644
--- a/cave_data/1623-291.html
+++ b/cave_data/1623-291.html
@@ -10,7 +10,7 @@
 <cave>
 <non_public>False</non_public>
 <caveslug>1623-291</caveslug>
-<official_name>Gl�ckliche Schmetterlingsh&ouml;hle</official_name><!-- Use &ouml; for umlaut eg H&ouml;hle for Hohle -->
+<official_name>Gl&uuml;ckliche Schmetterlingsh&ouml;hle</official_name><!-- Use &ouml; for umlaut eg H&ouml;hle for Hohle -->
 <area>1623</area>
 <area></area>
 <kataster_code></kataster_code>