diff --git a/src/c3nav/mapdata/converters.py b/src/c3nav/mapdata/converters.py
index 8560a395..9dac3bfc 100644
--- a/src/c3nav/mapdata/converters.py
+++ b/src/c3nav/mapdata/converters.py
@@ -39,7 +39,7 @@ class HistoryFileExtConverter:
 
 
 class ArchiveFileExtConverter:
-    regex = r'tar(\.(gz|xz|zstd))?'
+    regex = r'tar(\.(gz|xz|zst))?'
 
     def to_python(self, value):
         return value