diff --git a/.npmignore b/.npmignore
index 6ecaf28..20cb6a8 100644
--- a/.npmignore
+++ b/.npmignore
@@ -18,4 +18,5 @@ Gruntfile.js
 .gitattributes
 .gitignore
 typings/DefinitelyTyped
-doc/
\ No newline at end of file
+doc/
+*.dat
\ No newline at end of file