diff --git a/Python.gitignore b/Python.gitignore
index 70fc64d64cb9c1b652d1e45d454fb9a79572b7fc..cf332868f167eb6c77929ac02a6c95a56c44ffc3 100644
--- a/Python.gitignore
+++ b/Python.gitignore
@@ -53,6 +53,9 @@ coverage.xml
 *.log
 local_settings.py
 
+# Flask instance folder
+instance/
+
 # Sphinx documentation
 docs/_build/