diff --git a/workspace/Dockerfile b/workspace/Dockerfile
index 3a07eee2..6cb8bde8 100644
--- a/workspace/Dockerfile
+++ b/workspace/Dockerfile
@@ -414,6 +414,7 @@ RUN if [ ${INSTALL_AMQP} = true ]; then \
 ARG INSTALL_PHPREDIS=false
 
 RUN if [ ${INSTALL_PHPREDIS} = true ]; then \
+    apt-get update -yqq && \
     apt-get install -yqq php-redis \
 ;fi