diff --git a/package.json b/package.json
index 7bdacef5..79a70d9e 100644
--- a/package.json
+++ b/package.json
@@ -14,7 +14,7 @@
     "export-i18n": "bundle exec rake settings:combine_translations",
     "generate-openapi": "rake oapi:gen",
     "get-codegen-cli": "script/download_codegen_cli.sh",
-    "generate-api-js": "npm run get-codegen-cli && npm run generate-openapi && java -jar .bin/swagger-codegen-cli.jar generate -l 'typescript-jquery' -i tmp/openapi.json -o javascripts/api -t lib/swagger-typescript-jquery"
+    "generate-api-js": "rm -rf javascripts/api && npm run get-codegen-cli && npm run generate-openapi && java -jar .bin/swagger-codegen-cli.jar generate -l 'typescript-jquery' -i tmp/openapi.json -o javascripts/api -t lib/swagger-typescript-jquery"
   },
   "devDependencies": {
     "@types/enzyme": "^3.1.9",