diff --git a/wsgi.py b/wsgi.py
index 60d4958..4cec264 100644
--- a/wsgi.py
+++ b/wsgi.py
@@ -183,7 +183,7 @@ def tables(
                 "      <td>Gesamt</td>",
             ]
             for i in range(len(df.columns) - 2):
-                tfoot.append("      <td/>")
+                tfoot.append("      <td></td>")
             tfoot.extend(
                 [
                     f"      <td>{df['Digitale Befragung'].sum()}</td>",