diff --git a/README.md b/README.md
index ff87a1b..37fd03c 100644
--- a/README.md
+++ b/README.md
@@ -165,6 +165,7 @@ ports are part of the example.
 version: '3'
 services:
   firefox:
+    image: jlesage/firefox
     build: .
     ports:
       - "5800:5800"