diff --git a/.npmignore b/.npmignore
index 44f4dd4..60d5022 100644
--- a/.npmignore
+++ b/.npmignore
@@ -19,4 +19,3 @@
 
 # Others
 *.iml
-*.js.map
\ No newline at end of file
diff --git a/package.json b/package.json
index 2db598e..0624ba8 100644
--- a/package.json
+++ b/package.json
@@ -9,7 +9,8 @@
   },
   "types": "dist/index.d.ts",
   "files": [
-    "dist"
+    "dist",
+    "!dist/*.js.map"
   ],
   "sideEffects": false,
   "author": "RWS",