diff --git a/components/style/properties/Mako-0.9.1.zip b/components/style/properties/Mako-0.9.1.zip
deleted file mode 100644
index b7450e30012..00000000000
Binary files a/components/style/properties/Mako-0.9.1.zip and /dev/null differ
diff --git a/components/style/properties/build.py b/components/style/properties/build.py
index daa9140fd02..6f5550c7103 100644
--- a/components/style/properties/build.py
+++ b/components/style/properties/build.py
@@ -7,7 +7,6 @@ import os.path
 import sys
 
 BASE = os.path.dirname(__file__.replace('\\', '/'))
-sys.path.insert(0, os.path.join(BASE, "Mako-0.9.1.zip"))
 sys.path.insert(0, BASE)  # For importing `data.py`
 
 from mako import exceptions
diff --git a/python/requirements.txt b/python/requirements.txt
index 97487c76aff..dd05d2f7694 100644
--- a/python/requirements.txt
+++ b/python/requirements.txt
@@ -10,6 +10,7 @@ toml == 0.9.1
 flake8 == 2.4.1
 pep8 == 1.5.7
 pyflakes == 0.8.1
+mako == 0.9.1
 
 # For test-webidl
 ply == 3.8