diff --git a/Dockerfile b/Dockerfile
index 7ffc8e6..9c9897d 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -6,4 +6,4 @@ COPY plugin.sh /plugin
 
 WORKDIR /drone/src
 
-CMD ["bash", "/plugin/plugin.sh"]
+CMD ["sh", "/plugin/plugin.sh"]
diff --git a/plugin.sh b/plugin.sh
index 01b00a9..a2ce6d6 100755
--- a/plugin.sh
+++ b/plugin.sh
@@ -1,16 +1,16 @@
-#!/bin/bash
+#!/bin/sh
 
-function load_deploy_key {
+load_deploy_key() {
   echo "FOUND THE FOLLOWING SETTINGS..."
   echo "$PLUGIN_DEPLOY_KEY"
   echo "-------------------------------"
 }
 
-function run_stack_deploy {
+run_stack_deploy() {
   echo "TODO: run_stack_deploy"
 }
 
-function run_plugin {
+run_plugin() {
   load_deploy_key
   run_stack_deploy
 }