diff --git a/deploy/collabora-proxy/conf.d/collabora.conf b/deploy/collabora-proxy/conf.d/collabora.conf
index ed3a52b..1fe3064 100644
--- a/deploy/collabora-proxy/conf.d/collabora.conf
+++ b/deploy/collabora-proxy/conf.d/collabora.conf
@@ -157,8 +157,8 @@ server {
         proxy_send_timeout 3600s;
         proxy_connect_timeout 60s;
 
-        proxy_buffer_size 128k;
-        proxy_buffers 4 256k;
-        proxy_busy_buffers_size 256k;
+        proxy_buffer_size 256k;
+        proxy_buffers 4 512k;
+        proxy_busy_buffers_size 512k;
     }
 }