diff --git a/TravisCI.md b/TravisCI.md
index 6871b22..e0a01bb 100644
--- a/TravisCI.md
+++ b/TravisCI.md
@@ -103,14 +103,19 @@ script: shellcheck **/*.sh
 `Makefile`:
 
 ```Makefile
+.PHONY: lint
+lint: vendor/shellcheck
+	vendor/shellcheck **/*.sh
+
+vendor/shellcheck:
+	wget -c 'https://goo.gl/ZzKHFv' -O - | tar -xvJ -C /tmp/
+	mkdir -p vendor/
+	cp /tmp/shellcheck-latest/shellcheck $@
 ```
 
 `.travis.yml`:
 
 ```yaml
 language: bash
-before_install:
-  - wget -c https://goo.gl/ZzKHFv -O - | tar -xvJ -C /tmp/
-  - PATH="/tmp/shellcheck-latest:$PATH"
-script: shellcheck **/*.sh
+script: make lint
 ```