diff --git a/progit/default_config.py b/progit/default_config.py
index ce2001d..8aaf56c 100644
--- a/progit/default_config.py
+++ b/progit/default_config.py
@@ -121,3 +121,6 @@ CHECK_SESSION_IP = True
 
 # Lenght for short commits ids or file hex
 SHORT_LENGTH = 6
+
+# Make browsers send session cookie only via HTTPS
+SESSION_COOKIE_SECURE = True