diff --git a/Dockerfile b/Dockerfile
index 6dc2452..ddf67e3 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -82,6 +82,7 @@ RUN set -ex; \
 
 RUN \
   set -ex; \
+  apt-get update; \
   if [ -n "${PACK_LIST}" ];then echo "Installing packages: $PACK_LIST";pkmgr install ${PACK_LIST};fi; \
   echo ""