diff --git a/src/configurations/destinations/keen/ui-config.json b/src/configurations/destinations/keen/ui-config.json
index f5eceeb4c..57fc6c541 100644
--- a/src/configurations/destinations/keen/ui-config.json
+++ b/src/configurations/destinations/keen/ui-config.json
@@ -16,7 +16,7 @@
           "type": "textInput",
           "label": "Write Key",
           "value": "writeKey",
-          "regex": "^(.{0,100})$",
+          "regex": "^(.{0,250})$",
           "regexErrorMessage": "Invalid Write Key",
           "required": true
         }