diff --git a/Dockerfile b/Dockerfile
index 9e53699..056cbc3 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,7 +1,6 @@
 FROM alpine
 
-RUN apk update
-RUN apk add openssl
+RUN apk update && apk add openssl
 RUN openssl req \
     -newkey rsa:4096 -nodes -sha256 -keyout server.key \
     -x509 -days 365 -out server.crt \