diff --git a/Dockerfile b/Dockerfile
index a1a5dbd..465f79a 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -63,7 +63,7 @@ RUN echo "$NEWS_SHA256_SUM  news.tar.gz" | sha256sum -c - || exit 1
 RUN mkdir /var/lib/nextcloud/apps/news
 RUN tar xzf news.tar.gz -C /var/lib/nextcloud/apps/news --strip 1
 
-ENV EMAIL_VERSION=1.3.5
+ENV EMAIL_VERSION=v1.3.5
 ENV EMAIL_SHA256_SUM=830098607448ff94e401eb7d408133b62caf259296bab1dd743095aea52f9358
 RUN wget https://github.com/nextcloud/mail/releases/download/$EMAIL_VERSION/mail.tar.gz
 RUN echo "$EMAIL_SHA256_SUM  mail.tar.gz" | sha256sum -c - || exit 1