diff --git a/Dockerfile b/Dockerfile
index fd82356..d68ad35 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -6,7 +6,7 @@ USER root
 
 COPY start-agent.sh /usr/local/bin/start.sh
 RUN chmod 755 /usr/local/bin/start.sh
-ENTRYPOINT [ "/usr/local/bin/start.sh" ]
+ENTRYPOINT [ "/bin/bash", "/usr/local/bin/start.sh" ]
 
 RUN apt-get update && apt-get install -y \
     ca-certificates \
diff --git a/start-agent.sh b/start-agent.sh
index d07633b..841e1d5 100644
--- a/start-agent.sh
+++ b/start-agent.sh
@@ -1,3 +1,5 @@
+#!/bin/bash
+
 if [ $(whoami) != "jenkins" ] || [ $(id -u) == "0" ]; then
   echo "This script must be run as jenkins"
   exit 1