diff --git a/Makefile b/Makefile
index ef40244..09c31c1 100644
--- a/Makefile
+++ b/Makefile
@@ -1,5 +1,4 @@
-DOCKER_IMAGE_NAME = calpine-os-linux
-DOCKER_IMAGE_VERSION = 3.13
+DOCKER_IMAGE_NAME = cubetiq/calpine-os-linux:3.13
 DOCKER_IMAGE_SIZE = $(shell docker images --format "{{.Repository}} {{.Size}}" | grep $(DOCKER_IMAGE_NAME) | cut -d\   -f2)
 
 build:
diff --git a/src/post-install.sh b/src/post-install.sh
index be25f11..6f3f1b3 100755
--- a/src/post-install.sh
+++ b/src/post-install.sh
@@ -14,5 +14,11 @@ update-ca-certificates
 /sbin/apk update
 /sbin/apk upgrade
 
-# Add a standard user.
-adduser -D -u1000 cubetiq
\ No newline at end of file
+# Allow run sudo
+/sbin/apk add sudo
+
+# Add wheel group
+echo '%wheel ALL=(ALL) ALL' > /etc/sudoers.d/wheel 
+
+# Add an administrator user.
+adduser -D -u1000 cubetiq wheel
\ No newline at end of file