diff --git a/datasources/schemas/tags/hosting.schema.json b/datasources/schemas/tags/hosting.schema.json
index a8cd8e5..c781b47 100644
--- a/datasources/schemas/tags/hosting.schema.json
+++ b/datasources/schemas/tags/hosting.schema.json
@@ -9,7 +9,22 @@
             ]
         },
         "stars": {
-            "type": "string"
+            "enum": [
+                "1",
+                "1S",
+                "1.5",
+                "2",
+                "2S",
+                "2.5",
+                "3",
+                "3S",
+                "3.5",
+                "4",
+                "4S",
+                "4.5",
+                "5",
+                "5S"
+            ]
         },
         "award:tournesol": {
             "title": "Non OSM",