diff --git a/Dockerfile b/Dockerfile
index 23d58bc..419d31d 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,7 +1,7 @@
 FROM openjdk:11-jre
 
 ENV APPLICATION_USER ktor
-RUN adduser --defaults --gid '' $APPLICATION_USER
+RUN useradd $APPLICATION_USER
 
 RUN mkdir /app
 RUN chown -R $APPLICATION_USER /app