diff --git a/build/Dockerfile-nginx b/build/Dockerfile-nginx
index 5c2e0a9..4c9c75d 100644
--- a/build/Dockerfile-nginx
+++ b/build/Dockerfile-nginx
@@ -4,7 +4,7 @@ ARG version=dev-master
 ARG http_version=dev-master
 RUN mkdir /ppm && cd /ppm && composer require php-pm/php-pm:${version} && composer require php-pm/httpkernel-adapter:${http_version}
 
-FROM alpine:3.6
+FROM alpine:3.7
 
 ENV LC_ALL en_US.UTF-8
 ENV LANG en_US.UTF-8
diff --git a/build/Dockerfile-ppm b/build/Dockerfile-ppm
index 648cf69..996ebbf 100644
--- a/build/Dockerfile-ppm
+++ b/build/Dockerfile-ppm
@@ -4,7 +4,7 @@ ARG version=dev-master
 ARG http_version=dev-master
 RUN mkdir /ppm && cd /ppm && composer require php-pm/php-pm:${version} && composer require php-pm/httpkernel-adapter:${http_version}
 
-FROM alpine:3.6
+FROM alpine:3.7
 
 ENV LC_ALL en_US.UTF-8
 ENV LANG en_US.UTF-8
diff --git a/build/Dockerfile-standalone b/build/Dockerfile-standalone
index 576c455..fba1ab8 100644
--- a/build/Dockerfile-standalone
+++ b/build/Dockerfile-standalone
@@ -4,7 +4,7 @@ ARG version=dev-master
 ARG http_version=dev-master
 RUN mkdir /ppm && cd /ppm && composer require php-pm/php-pm:${version} && composer require php-pm/httpkernel-adapter:${http_version}
 
-FROM alpine:3.6
+FROM alpine:3.7
 
 ENV LC_ALL en_US.UTF-8
 ENV LANG en_US.UTF-8