diff --git a/dispatcher/backend/src/common/schemas/offliners/zimit.py b/dispatcher/backend/src/common/schemas/offliners/zimit.py
index 6f441da0..f4cf38fa 100644
--- a/dispatcher/backend/src/common/schemas/offliners/zimit.py
+++ b/dispatcher/backend/src/common/schemas/offliners/zimit.py
@@ -205,7 +205,8 @@ class Meta:
     tags = String(
         metadata={
             "label": "ZIM Tags",
-            "description": "List of Tags for the ZIM file.",
+            "description": "Single string with individual tags "
+            "separated by a semicolon.",
         }
     )