diff --git a/.gitignore b/.gitignore
index ba94c807d204266b925eb7c25a92bc57bfe42971..5f53200b7e9a1ab828bc6a22ad7a23645c989fc3 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,6 +2,7 @@
 *.pyc
 *.pyo
 *.so
+*.pyd
 /kwant/*.c
 /kwant/*/*.c
 /build
@@ -16,3 +17,4 @@
 .coverage
 .eggs/
 htmlcov/
+.ipynb_checkpoints/