diff --git a/upgrade_edge/Dockerfile b/upgrade_edge/Dockerfile
index 7293048..6e80b84 100644
--- a/upgrade_edge/Dockerfile
+++ b/upgrade_edge/Dockerfile
@@ -1,7 +1,9 @@
 FROM ghcr.io/eficode-academy/edgek8s-management
 
+RUN apk add --no-cache bash
+
 COPY upgrade_edge/upgrade_edge.sh /opt/upgrade_edge.sh
 
 RUN chmod +x /opt/upgrade_edge.sh
 
-CMD ["/bin/sh", "-x", "/opt/upgrade_edge.sh"]
+CMD ["/bin/bash", "-x", "/opt/upgrade_edge.sh"]