diff --git a/Dockerfile b/Dockerfile
index 6ffc193..e2d7f81 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,7 +1,7 @@
 FROM alpine:3.11 AS builder
 
 ENV VERSION=1.4.2
-ENV SHA256_SUM=6bd2a2ac05d6575c290c784e1267090550c56c92f65b66f0b155832fc860ef2c
+ENV SHA256_SUM=c83a746c3ab561ab51df5729627d33bba3520c5d59ee03762739b4e8ad9b0f69
 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
 RUN mkdir -p /var/lib/roundcube