diff --git a/lib/info-schema.js b/lib/info-schema.js
index 3696057..ad0ae77 100644
--- a/lib/info-schema.js
+++ b/lib/info-schema.js
@@ -49,7 +49,7 @@ const infoSchema = {
             "type": "array",
             "items": {
                 "type": "string",
-                "pattern": "^(!\\s[A-Za-z0-9-_]+|(([?~]|\\(\\?\\))\\s)?[A-Za-z0-9-_]+(\\s(?:=|[<>]=?)\\s(\\d+\\.){2}\\d+)?)$"
+                "pattern": "^(!\\s[A-Za-z0-9-_\\s]+?|(([?~]|\\(\\?\\))\\s)?[A-Za-z0-9-_\\s]+?(\\s(?:=|[<>]=?)\\s(\\d+\\.){2}\\d+)?)$"
             }
         }
     }