diff --git a/build/composer/README b/build/composer/README
new file mode 100644
index 00000000000..2464b0d246e
--- /dev/null
+++ b/build/composer/README
@@ -0,0 +1,5 @@
+
+To upgrade a lib with composer:
+
+composer update --no-dev --no-autoloader --dry-run ccampbell/chromephp
+