diff --git a/ur_robot_driver/doc/make.bat b/ur_robot_driver/doc/make.bat
index 27f573b87..558ef605a 100644
--- a/ur_robot_driver/doc/make.bat
+++ b/ur_robot_driver/doc/make.bat
@@ -21,7 +21,7 @@ if errorlevel 9009 (
 	echo.may add the Sphinx directory to PATH.
 	echo.
 	echo.If you don't have Sphinx installed, grab it from
-	echo.http://sphinx-doc.org/
+	echo.https://sphinx-doc.org/
 	exit /b 1
 )