diff --git a/cave_data/1623-2015-dl-01.html b/cave_data/1623-2015-DL-01.html
similarity index 99%
rename from cave_data/1623-2015-dl-01.html
rename to cave_data/1623-2015-DL-01.html
index 43535288e..cb95e54cc 100644
--- a/cave_data/1623-2015-dl-01.html
+++ b/cave_data/1623-2015-DL-01.html
@@ -17,7 +17,7 @@ the form documented at
 
 <cave>
 <non_public>False</non_public><!-- 'False' or 'True'. True if the cave should only be visible to logged-in users. Caves are normally public, so enter 'False' unless you know otherwise. -->
-<caveslug>1623-2015-dl-01</caveslug><!--(Required). Internal I.D. used to refer to this cave in entrance data files. Typically the same as the filebase, e.g. '1623-195'  -->
+<caveslug>1623-2015-DL-01</caveslug><!--(Required). Internal I.D. used to refer to this cave in entrance data files. Typically the same as the filebase, e.g. '1623-195'  -->
 <official_name>Shagged Spit H&ouml;hle</official_name><!-- Name of the cave (normally in German)  Use &uuml; for u+Umlaut and &ouml; for o+umlaut eg H&ouml;hle for Hohle and Gl&uuml;ck for Gluck-->
 <area>1623</area><!-- e.g. "1623" -->
 <kataster_code></kataster_code><!-- 'length-or-depth/type exploration'
diff --git a/cave_data/1623-2015-dl-02.html b/cave_data/1623-2015-DL-02.html
similarity index 100%
rename from cave_data/1623-2015-dl-02.html
rename to cave_data/1623-2015-DL-02.html