diff --git a/Containerfile b/Containerfile
index ceaac4e..7b3c1c7 100644
--- a/Containerfile
+++ b/Containerfile
@@ -20,8 +20,8 @@ RUN echo "$COMPOSER_SHA256_SUM  composer.phar" | sha256sum -c - || exit 1
 RUN mv composer.phar /usr/bin/composer
 RUN chmod +x /usr/bin/composer
 
-ENV VERSION=1.6.5
-ENV SHA256_SUM=164b72cb78de89d104741ee9090f4024e63bfada43949034844365f3fa70b5fd
+ENV VERSION=1.6.6
+ENV SHA256_SUM=c1b93a3edbe297457396b0a031d8b13c8a5dc30c9370704dfb9b2c1225017d52
 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