diff --git a/Dockerfile b/Dockerfile
index 2151a43e..e5dbcd3f 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -4,7 +4,8 @@ ARG DEBIAN_FRONTEND=noninteractive
 
 # Apache
 
-RUN apt-get install -y --no-install-recommends \
+RUN apt-get update \
+    && apt-get install -y --no-install-recommends \
         apache2 \
         libapache2-mod-php \
     && . /etc/apache2/envvars \