diff --git a/Dockerfile b/Dockerfile
index 87de1283d..4832011bd 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,3 @@
 FROM openjdk:8-jdk-alpine
-ARG JAR_FILE=target/*.jar
-COPY ${JAR_FILE} app.jar
+COPY target/*.jar app.jar
 ENTRYPOINT ["java","-Djava.security.egd=file:/dev/./urandom","-jar","/app.jar"]