diff --git a/Dockerfile b/Dockerfile
index 1dfa3bd..9f588cf 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -9,6 +9,9 @@ ENV MW_VERSION REL1_27
 
 WORKDIR /
 
+# Update composer
+RUN composer self-update
+
 # Remove the old hello world app and grab Mediawiki source
 RUN apt-get update && apt-get install -yq git && rm -rf /var/lib/apt/lists/*
 RUN rm -fr /app && mv /var/www/html /var/www/w && git clone https://gerrit.wikimedia.org/r/p/mediawiki/core.git /app