diff --git a/Dockerfile b/Dockerfile
index d33adaa..32aee83 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -15,11 +15,12 @@ ENV GID=23456
 
 RUN addgroup -S docker \
    && adduser \
+    --disabled-password \
     --gecos "" \
-    --home "/home/${USERhome}" \
-    --ingroup "${USERhome}" \
-    --uid "${UID}" \
-    "${USERhome}"
+    --home "/home/$USERhome" \
+    --ingroup "$USERhome" \
+    --uid "$UID" \
+    "$USERhome"