diff --git a/ci/ci.sh b/ci/ci.sh
index 85e208c..c7a6bfd 100755
--- a/ci/ci.sh
+++ b/ci/ci.sh
@@ -1,6 +1,6 @@
 #!/bin/bash
 
-version=6.3.11
+version=6.3.4
 set -e -x
 ./ci/install_deps.sh
 
diff --git a/image/Makefile b/image/Makefile
index f1211d5..19b96f1 100644
--- a/image/Makefile
+++ b/image/Makefile
@@ -1,4 +1,4 @@
-server_version=6.3.11
+server_version=6.3.4
 
 base_image=seafileltd/base:18.04
 base_image_squashed=seafileltd/base:18.04-squashed
diff --git a/image/seafile/Dockerfile b/image/seafile/Dockerfile
index 944c8a8..86dda05 100644
--- a/image/seafile/Dockerfile
+++ b/image/seafile/Dockerfile
@@ -3,7 +3,7 @@ WORKDIR /opt/seafile
 
 RUN mkdir -p /etc/my_init.d
 
-ENV SEAFILE_VERSION=6.3.3 SEAFILE_SERVER=seafile-server
+ENV SEAFILE_VERSION=6.3.4 SEAFILE_SERVER=seafile-server
 
 RUN mkdir -p /opt/seafile/ && \
     curl -sSL -o - https://download.seadrive.org/seafile-server_${SEAFILE_VERSION}_x86-64.tar.gz \
diff --git a/scripts/bootstrap.py b/scripts/bootstrap.py
index 6b21a85..d01ac31 100755
--- a/scripts/bootstrap.py
+++ b/scripts/bootstrap.py
@@ -128,6 +128,17 @@ def init_seafile_server():
     domain = get_conf('SEAFILE_SERVER_HOSTNAME', 'seafile.example.com')
     proto = 'https' if is_https() else 'http'
     with open(join(topdir, 'conf', 'seahub_settings.py'), 'a+') as fp:
+        fp.write('\n')
+        fp.write("""CACHES = {
+    'default': {
+        'BACKEND': 'django_pylibmc.memcached.PyLibMCCache',
+        'LOCATION': '127.0.0.1:11211',
+    },
+    'locmem': {
+        'BACKEND': 'django.core.cache.backends.locmem.LocMemCache',
+    },
+}
+COMPRESS_CACHE_BACKEND = 'locmem'""")
         fp.write('\n')
         fp.write('FILE_SERVER_ROOT = "{proto}://{domain}/seafhttp"'.format(proto=proto, domain=domain))
         fp.write('\n')