diff --git a/.gitignore b/.gitignore
index c36ae1c90..994559bb1 100644
--- a/.gitignore
+++ b/.gitignore
@@ -21,6 +21,7 @@
 
 # npm stuff
 npm-debug.log
+node_modules
 
 # gdb files
 .gdb_history
diff --git a/js/package.json b/js/package.json
index fde5dbb02..3e3bcf80a 100644
--- a/js/package.json
+++ b/js/package.json
@@ -48,7 +48,7 @@
     "ci:build:embed": "NODE_ENV=production EMBED=1 node webpack/embed",
     "start": "npm install && npm run build:lib && npm run build:dll && npm run start:app",
     "start:app": "node webpack/dev.server",
-    "clean": "rm -rf ./.build ./.coverage ./.happypack ./.npmjs ./build ./node_modules/.cache",
+    "clean": "rm -rf ./.build ./.coverage ./.happypack ./.npmjs ./build ./node_modules/.cache ./node_modules/@parity",
     "coveralls": "npm run testCoverage && coveralls < coverage/lcov.info",
     "lint": "npm run lint:css && npm run lint:js",
     "lint:cached": "npm run lint:css && npm run lint:js:cached",
diff --git a/node_modules/.yarn-integrity b/node_modules/.yarn-integrity
deleted file mode 100644
index bbcd21cb3..000000000
--- a/node_modules/.yarn-integrity
+++ /dev/null
@@ -1 +0,0 @@
-549854b8a60607db81d4c58008d59f812d744acba026266f380acd942941356a
\ No newline at end of file
diff --git a/yarn.lock b/yarn.lock
deleted file mode 100644
index fb57ccd13..000000000
--- a/yarn.lock
+++ /dev/null
@@ -1,4 +0,0 @@
-# THIS IS AN AUTOGENERATED FILE. DO NOT EDIT THIS FILE DIRECTLY.
-# yarn lockfile v1
-
-