diff --git a/seafile-server-centos-7-amd64-http b/seafile-server-centos-7-amd64-http
index b88d651..0fa2e42 100644
--- a/seafile-server-centos-7-amd64-http
+++ b/seafile-server-centos-7-amd64-http
@@ -160,12 +160,10 @@ firewall-cmd --reload
 # extra packages for enterprise linux
 yum install epel-release -y
 yum upgrade -y
-yum install python-setuptools python-pip MySQL-python python-memcached memcached python-urllib3 \
+yum install python-setuptools python-imaging MySQL-python python-memcached memcached python-urllib3 \
     pwgen curl openssl python-ldap java-1.7.0-openjdk poppler-utils libreoffice python-requests \
     libreoffice-headless libreoffice-pyuno wqy-microhei-fonts wqy-zenhei-fonts wqy-unibit-fonts -y
 
-pip install --upgrade Pillow
-
 # start memcached on system boot
 systemctl enable memcached
 
diff --git a/seafile-server-ubuntu-16-04-amd64-http b/seafile-server-ubuntu-16-04-amd64-http
index 9739c42..660c910 100644
--- a/seafile-server-ubuntu-16-04-amd64-http
+++ b/seafile-server-ubuntu-16-04-amd64-http
@@ -140,12 +140,10 @@ fi
 # Additional requirements
 # -------------------------------------------
 apt-get update
-apt-get install -y python2.7 sudo python-pip python-setuptools python-mysqldb python-ldap python-urllib3 \
+apt-get install -y python2.7 sudo python-pip python-setuptools python-imaging python-mysqldb python-ldap python-urllib3 \
 openjdk-8-jre memcached python-memcache pwgen curl openssl poppler-utils libpython2.7 libreoffice \
 libreoffice-script-provider-python ttf-wqy-microhei ttf-wqy-zenhei xfonts-wqy nginx python-requests
 
-pip install --upgrade Pillow
-
 rm /etc/nginx/sites-enabled/*
 
 cat > /etc/nginx/sites-available/seafile.conf <<'EOF'