diff --git a/.gitignore b/.gitignore
index b62617d21..2682a6748 100644
--- a/.gitignore
+++ b/.gitignore
@@ -16,3 +16,4 @@ cython/gtsam.pyx
 cython/gtsam.so
 cython/gtsam_wrapper.pxd
 .vscode
+.env