diff --git a/types/plugins.schema.json b/types/plugins.schema.json
index 8dcee60b..3046058e 100644
--- a/types/plugins.schema.json
+++ b/types/plugins.schema.json
@@ -18,6 +18,7 @@
             },
             "icon": {
                 "type": "string",
+                "pattern": "^[a-zA-Z0-9._-]+$",
                 "description": "Icon, either an icon resolvable string, or icon.png / icon.svg in the new repo format"
             },
             "description": {