diff --git a/sulu-builder/Makefile b/sulu-builder/Makefile
index c90b0bcf696abdeeca5c27c21c36414115e974b0..dd3b3343d65541084339e5516b9a4a29ad06eb45 100644
--- a/sulu-builder/Makefile
+++ b/sulu-builder/Makefile
@@ -5,7 +5,7 @@
 include $(TOPDIR)/rules.mk
 
 PKG_NAME:=sulu-builder
-PKG_VERSION:=1.3.11
+PKG_VERSION:=1.3.10
 
 PKG_SOURCE_PROTO:=git
 PKG_SOURCE_URL:=https://dev.iopsys.eu/websdk/sulu-builder.git
diff --git a/sulu-builder/files/etc/nginx/conf.d/sulu.conf b/sulu-builder/files/etc/nginx/conf.d/sulu.conf
index 3d65b3cbda3e4ad2be2fd93917489ce0402b3996..025139c8b5a7b9c01d985dad7a1914d3e7c769cf 100644
--- a/sulu-builder/files/etc/nginx/conf.d/sulu.conf
+++ b/sulu-builder/files/etc/nginx/conf.d/sulu.conf
@@ -5,13 +5,12 @@ server {
         root /sulu;
         location /config/ {
                 autoindex on;
-                expires -1;
 
                 if ($request_method = 'OPTIONS') {
                         add_header 'Access-Control-Allow-Origin' '*';
                         add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS';
-                        add_header 'Access-Control-Allow-Headers' 'DNT,User-Agent,X-Requested-With,Content-Type,Range';
-                        add_header Cache-Control 'no-store, no-cache, must-revalidate, proxy-revalidate, max-age=0';
+                        add_header 'Access-Control-Allow-Headers' 'DNT,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type,Range';
+                        add_header 'Access-Control-Max-Age' 1728000;
                         add_header 'Content-Type' 'text/plain; charset=utf-8';
                         add_header 'Content-Length' 0;
                         return 204;
@@ -19,9 +18,8 @@ server {
                 if ($request_method = 'GET') {
                         add_header 'Access-Control-Allow-Origin' '*' always;
                         add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS' always;
-                        add_header 'Access-Control-Allow-Headers' 'DNT,User-Agent,X-Requested-With,Content-Type,Range' always;
+                        add_header 'Access-Control-Allow-Headers' 'DNT,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type,Range' always;
                         add_header 'Access-Control-Expose-Headers' 'Content-Length,Content-Range' always;
-                        add_header Cache-Control 'no-store, no-cache, must-revalidate, proxy-revalidate, max-age=0';
                 }
         }
 }
diff --git a/sulu/Makefile b/sulu/Makefile
index eb9dc66000c3ccae61891597ae8d3bf3840ef8aa..dff40ae6f872321828a0473276ffbde80b3ef1c4 100644
--- a/sulu/Makefile
+++ b/sulu/Makefile
@@ -5,7 +5,7 @@
 include $(TOPDIR)/rules.mk
 
 PKG_NAME:=sulu
-PKG_VERSION:=1.3.11
+PKG_VERSION:=1.3.10
 
 PKG_SOURCE_PROTO:=git
 PKG_SOURCE_URL:=https://dev.iopsys.eu/websdk/sulu.git
diff --git a/sulu/files/etc/nginx/conf.d/sulu.conf b/sulu/files/etc/nginx/conf.d/sulu.conf
index 3d65b3cbda3e4ad2be2fd93917489ce0402b3996..025139c8b5a7b9c01d985dad7a1914d3e7c769cf 100644
--- a/sulu/files/etc/nginx/conf.d/sulu.conf
+++ b/sulu/files/etc/nginx/conf.d/sulu.conf
@@ -5,13 +5,12 @@ server {
         root /sulu;
         location /config/ {
                 autoindex on;
-                expires -1;
 
                 if ($request_method = 'OPTIONS') {
                         add_header 'Access-Control-Allow-Origin' '*';
                         add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS';
-                        add_header 'Access-Control-Allow-Headers' 'DNT,User-Agent,X-Requested-With,Content-Type,Range';
-                        add_header Cache-Control 'no-store, no-cache, must-revalidate, proxy-revalidate, max-age=0';
+                        add_header 'Access-Control-Allow-Headers' 'DNT,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type,Range';
+                        add_header 'Access-Control-Max-Age' 1728000;
                         add_header 'Content-Type' 'text/plain; charset=utf-8';
                         add_header 'Content-Length' 0;
                         return 204;
@@ -19,9 +18,8 @@ server {
                 if ($request_method = 'GET') {
                         add_header 'Access-Control-Allow-Origin' '*' always;
                         add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS' always;
-                        add_header 'Access-Control-Allow-Headers' 'DNT,User-Agent,X-Requested-With,Content-Type,Range' always;
+                        add_header 'Access-Control-Allow-Headers' 'DNT,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type,Range' always;
                         add_header 'Access-Control-Expose-Headers' 'Content-Length,Content-Range' always;
-                        add_header Cache-Control 'no-store, no-cache, must-revalidate, proxy-revalidate, max-age=0';
                 }
         }
 }