diff --git a/jenkins/docker-compose.yml b/jenkins/docker-compose.yml
index 00d6479..f4c2861 100644
--- a/jenkins/docker-compose.yml
+++ b/jenkins/docker-compose.yml
@@ -1,5 +1,5 @@
 jenkins:
-  image: jenkinsci/jenkins
+  image: jenkins:alpine
   ports:
     - "8080:8080"
     - "50000:50000"
diff --git a/minidlna/Dockerfile b/minidlna/Dockerfile
index fbb710c..f2aa559 100644
--- a/minidlna/Dockerfile
+++ b/minidlna/Dockerfile
@@ -5,9 +5,7 @@
 FROM alpine
 MAINTAINER kev <noreply@easypi.info>
 
-RUN set -xe \
-    && apk add -U minidlna \
-    && rm -rf /var/cache/apk/*
+RUN apk add --no-cache minidlna
 
 VOLUME /opt
 WORKDIR /opt
diff --git a/minidlna/arm/Dockerfile b/minidlna/arm/Dockerfile
index 7e09b78..23b20bf 100644
--- a/minidlna/arm/Dockerfile
+++ b/minidlna/arm/Dockerfile
@@ -5,9 +5,7 @@
 FROM easypi/alpine-arm
 MAINTAINER EasyPi Software Foundation
 
-RUN set -xe \
-    && apk add -U minidlna \
-    && rm -rf /var/cache/apk/*
+RUN apk add --no-cache minidlna
 
 VOLUME /opt
 WORKDIR /opt
@@ -15,4 +13,4 @@ WORKDIR /opt
 EXPOSE 1900/udp
 EXPOSE 8200/tcp
 
-CMD ["minidlna", "-d"]
+CMD ["minidlnad", "-d"]
diff --git a/zoneminder/Dockerfile b/zoneminder/Dockerfile
index 550a7c5..3a80c23 100644
--- a/zoneminder/Dockerfile
+++ b/zoneminder/Dockerfile
@@ -19,7 +19,8 @@ RUN set -xe \
     && chmod o+r /etc/zm/zm.conf \
     && sed -i 's@^ZM_DB_HOST=.*$@ZM_DB_HOST=mysql@' /etc/zm/zm.conf \
     && sed -i 's@^;date.timezone =.*$@date.timezone = Asia/Shanghai@' /etc/php5/*/php.ini \
-    && ln -sf /usr/share/zoneinfo/Asia/Shanghai /etc/localtime
+    && ln -sf /usr/share/zoneinfo/Asia/Shanghai /etc/localtime \
+    && echo 'FCGI_CHILDREN=4' > /etc/default/fcgiwrap
 
 COPY nginx.conf /etc/nginx/sites-available/default