diff --git a/core/views/expo.py b/core/views/expo.py
index 07a8c5c..6076ded 100644
--- a/core/views/expo.py
+++ b/core/views/expo.py
@@ -131,7 +131,7 @@ def expowebpage(request, expowebpath, path):
     try:
         with open(os.path.normpath(expowebpath / path).encode(sysdefaultencoding), "r", encoding='utf-8') as o:   
             html = o.read()
-    except:
+    except Cave.DoesNotExist:
         # exception raised on debian with python 3.9.2 but not on WSL Ubuntu with python 3.9.5
         # because debian was assuming default text encoding was 'ascii'. Now specified explicitly so should be OK
         try: