diff --git a/phpbb/Dockerfile b/phpbb/Dockerfile
index 368c279..3ccf953 100644
--- a/phpbb/Dockerfile
+++ b/phpbb/Dockerfile
@@ -7,23 +7,21 @@ MAINTAINER kev<noreply@datageek.info>
 
 RUN a2enmod rewrite
 
-RUN apt-get update && apt-get install -y bzip2 libpng12-dev libjpeg-dev libpq-dev \
+RUN apt-get update && apt-get install -y libpng12-dev libjpeg-dev libpq-dev \
         && rm -rf /var/lib/apt/lists/* \
         && docker-php-ext-configure gd --with-png-dir=/usr --with-jpeg-dir=/usr \
-        && docker-php-ext-install fileinfo gd mbstring mysql mysqli pgsql
+        && docker-php-ext-install gd mysqli pgsql
 
 WORKDIR /var/www/html
 
 ENV PHPBB_VERSION 3.1.4
-ENV PHPBB_MD5 8b0bfa3bf487e68b59ff81a4e99e4d8f
+ENV PHPBB_SHA512 cc13d34679d987b7c956999b273b109fd441dcc786d7612c4b726423d674ade5
 ENV PHPBB_URL https://www.phpbb.com/files/release/phpBB-3.1.4.tar.bz2
 ENV PHPBB_FILE phpBB.tar.bz2
 
 RUN curl -fSL ${PHPBB_URL} -o ${PHPBB_FILE} \
-        && echo "${PHPBB_MD5} ${PHPBB_FILE}" | md5sum -c - \
-        && tar -xj --strip-components=1 -f ${PHPBB_FILE} \
+        && echo "${PHPBB_SHA512} ${PHPBB_FILE}" | sha256sum -c - \
+        && tar -xo --strip-components=1 -f ${PHPBB_FILE} \
         && rm ${PHPBB_FILE} \
         && chown -R www-data:www-data .
 
-RUN ln -sf /usr/share/zoneinfo/Asia/Shanghai /etc/localtime \
-        && echo 'date.timezone = "Asia/Shanghai"' > /usr/local/etc/php/php.ini