diff --git a/ci/ci.sh b/ci/ci.sh
index 5fe01fb..84d685a 100755
--- a/ci/ci.sh
+++ b/ci/ci.sh
@@ -1,6 +1,6 @@
 #!/bin/bash
 
-version=6.3.7
+version=6.3.9
 set -e -x
 ./ci/install_deps.sh
 
diff --git a/cluster/image/pro_seafile/templates/seafile.nginx.conf.template b/cluster/image/pro_seafile/templates/seafile.nginx.conf.template
index fe02cb0..cbbbf76 100644
--- a/cluster/image/pro_seafile/templates/seafile.nginx.conf.template
+++ b/cluster/image/pro_seafile/templates/seafile.nginx.conf.template
@@ -48,6 +48,7 @@ server {
         client_max_body_size 0;
         proxy_connect_timeout  36000s;
         proxy_read_timeout  36000s;
+        proxy_request_buffering off;
     }
 
     location /seafdav {
diff --git a/image/Makefile b/image/Makefile
index 14e3ea7..2028ce7 100644
--- a/image/Makefile
+++ b/image/Makefile
@@ -1,4 +1,4 @@
-server_version=6.3.7
+server_version=6.3.9
 
 base_image=seafileltd/base:18.04
 base_image_squashed=seafileltd/base:18.04-squashed
diff --git a/image/pro_seafile/Dockerfile b/image/pro_seafile/Dockerfile
index 19efd2e..58bd0ab 100644
--- a/image/pro_seafile/Dockerfile
+++ b/image/pro_seafile/Dockerfile
@@ -1,7 +1,7 @@
 FROM seafileltd/pro-base:18.04
 WORKDIR /opt/seafile
 
-ENV SEAFILE_VERSION=6.3.7 SEAFILE_SERVER=seafile-pro-server
+ENV SEAFILE_VERSION=6.3.9 SEAFILE_SERVER=seafile-pro-server
 
 RUN mkdir -p /etc/my_init.d
 
@@ -15,4 +15,6 @@ ADD scripts/create_data_links.sh /etc/my_init.d/01_create_data_links.sh
 COPY scripts /scripts
 COPY templates /templates
 
+EXPOSE 80
+
 CMD ["/sbin/my_init", "--", "/scripts/start.py"]
diff --git a/image/pro_seafile/templates/seafile.nginx.conf.template b/image/pro_seafile/templates/seafile.nginx.conf.template
index 574f4ab..3e4e59c 100644
--- a/image/pro_seafile/templates/seafile.nginx.conf.template
+++ b/image/pro_seafile/templates/seafile.nginx.conf.template
@@ -57,6 +57,7 @@ server {
         client_max_body_size 0;
         proxy_connect_timeout  36000s;
         proxy_read_timeout  36000s;
+        proxy_request_buffering off;
     }
 
     location /seafdav {
diff --git a/image/seafile/templates/seafile.nginx.conf.template b/image/seafile/templates/seafile.nginx.conf.template
index 30b04bd..321131b 100644
--- a/image/seafile/templates/seafile.nginx.conf.template
+++ b/image/seafile/templates/seafile.nginx.conf.template
@@ -58,6 +58,7 @@ server {
         client_max_body_size 0;
         proxy_connect_timeout  36000s;
         proxy_read_timeout  36000s;
+        proxy_request_buffering off;
     }
 
     location /seafdav {