diff --git a/contracts/.npmignore b/contracts/.npmignore
new file mode 100644
index 000000000..e792d8bc6
--- /dev/null
+++ b/contracts/.npmignore
@@ -0,0 +1,2 @@
+mocks
+examples
diff --git a/package.json b/package.json
index ed35a1696..84a8eb425 100644
--- a/package.json
+++ b/package.json
@@ -2,6 +2,9 @@
   "name": "zeppelin-solidity",
   "version": "1.8.0",
   "description": "Secure Smart Contract library for Solidity",
+  "files": [
+    "contracts"
+  ],
   "scripts": {
     "test": "scripts/test.sh",
     "lint": "eslint .",