diff --git a/Dockerfile b/Dockerfile
index 21130db..92d7be2 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM alpine:3.8 as build
+FROM alpine:3.9.4 as build
 
 ENV SQUID_VER 4.5
 ENV SQUID_SIG_KEY B06884EDB779C89B044E64E3CD6DBF8EF3B17D3E
@@ -98,7 +98,7 @@ RUN set -x && \
 	make -j $(grep -cs ^processor /proc/cpuinfo) && \
 	make install
 
-FROM alpine:3.8
+FROM alpine:3.9.4
 	
 ENV SQUID_CONFIG_FILE /etc/squid/squid.conf
 ENV TZ Europe/Moscow