diff --git a/python/requirements.txt b/python/requirements.txt
index 06da29804b3..473c80498e3 100644
--- a/python/requirements.txt
+++ b/python/requirements.txt
@@ -33,7 +33,7 @@ requests
 types-requests
 
 # For mach package on macOS.
-Mako == 1.2.2
+Mako == 1.3.11
 
 # For devtools tests.
 geckordp == 1.0.3