diff --git a/package.json b/package.json
index b62e44797..4263ecaab 100644
--- a/package.json
+++ b/package.json
@@ -164,7 +164,7 @@
   },
   "scripts": {
     "build": "webpack -p",
-    "extract-json-messages": "babel src 'src/**/*.{ts,tsx}' -o build/dashboard.bundle.js",
+    "extract-json-messages": "rimraf build/locale && babel src 'src/**/*.{ts,tsx}' -o build/dashboard.bundle.js",
     "extract-pot-messages": "rip json2pot \"build/locale/**/*.json\" -c description -o locale/messages.pot",
     "extract-messages": "npm run extract-json-messages && npm run extract-pot-messages",
     "build-messages": "rip po2json 'locale/**/*.po' -m 'build/locale/**/*.json' -o 'locale' -c 'description'",
@@ -178,4 +178,4 @@
     "test": "jest src/",
     "test-e2e": "testcafe 'chrome:headless' .testcafe"
   }
-}
+}
\ No newline at end of file