diff --git a/.gitignore b/.gitignore
index 71251cf8a..7bfdb8b53 100644
--- a/.gitignore
+++ b/.gitignore
@@ -29,6 +29,9 @@ _infrastructure/tests/build
 *.iml
 *.js.map
 
+#decimal.js
+!decimal.js
+
 #rx.js
 !rx.js