diff --git a/Dockerfile b/Dockerfile
index 0c580f2..6ffc193 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,6 +1,6 @@
-FROM alpine:3.10 AS builder
+FROM alpine:3.11 AS builder
 
-ENV VERSION=1.4.0
+ENV VERSION=1.4.2
 ENV SHA256_SUM=6bd2a2ac05d6575c290c784e1267090550c56c92f65b66f0b155832fc860ef2c
 RUN wget https://github.com/roundcube/roundcubemail/releases/download/$VERSION/roundcubemail-$VERSION-complete.tar.gz
 RUN echo "$SHA256_SUM  roundcubemail-$VERSION-complete.tar.gz" | sha256sum -c - || exit 1