diff --git a/experimental/babel-preset-env/.npmignore b/experimental/babel-preset-env/.npmignore
index e3f640a01d..40425577de 100644
--- a/experimental/babel-preset-env/.npmignore
+++ b/experimental/babel-preset-env/.npmignore
@@ -13,3 +13,5 @@ yarn.lock
 .eslintrc
 babel-preset-env-*.tgz
 flow-typed
+.github
+.idea