diff --git a/Dockerfile b/Dockerfile
index e0b00b1..d786b3f 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -72,7 +72,7 @@ COPY ./rootfs/usr/local/bin/. /usr/local/bin/
 
 RUN set -e; \
   echo "Updating the system and ensuring bash is installed"; \
-  pkmgr update;pkmgr install bash
+  apk -U upgrade --no-cache;apk add --no-cache bash
 
 RUN set -e; \
   echo "Setting up prerequisites"; \