diff --git a/targetconfig.json b/targetconfig.json
index a8bcafffa05..b53743e9571 100644
--- a/targetconfig.json
+++ b/targetconfig.json
@@ -487,7 +487,7 @@
             },
             "microbit-apps/arcadeshield": {
                 "simx": {
-                    "sha":    "5bac5ff5b80621b53b746e4bbe252e406b992bdb",
+                    "sha": "5bac5ff5b80621b53b746e4bbe252e406b992bdb",
                     "devUrl": "http://localhost:3000"
                 }
             }