diff --git a/.gitignore b/.gitignore
index 18373e8..21e2c07 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,10 +1,11 @@
 *.pyc
 *.sw?
 *~
 .coverage
 .eggs/
 __pycache__
 *.egg-info/
 version.txt
 build/
 dist/
+.tox