diff --git a/docker/Dockerfile-tt-rss b/docker/Dockerfile-tt-rss
index 6a743b7..1105367 100644
--- a/docker/Dockerfile-tt-rss
+++ b/docker/Dockerfile-tt-rss
@@ -1,7 +1,9 @@
 FROM ulsmith/alpine-apache-php7
 
 
-RUN apk add --update \
+RUN apk update \
+    && apk upgrade \
+    && apk add --update \
         php7-pgsql \
         php7-fileinfo \
         openrc \