diff --git a/roles/matrix_synapse/defaults/main.yml b/roles/matrix_synapse/defaults/main.yml
index 3ab0b3d..e22632f 100644
--- a/roles/matrix_synapse/defaults/main.yml
+++ b/roles/matrix_synapse/defaults/main.yml
@@ -1,7 +1,7 @@
 ---
 
 # Synapse version to deploy
-synapse_version: 1.33.1
+synapse_version: 1.33.2
 
 # Should ansible handle Synapse upgrades ? If false, only initial install will be done
 synapse_manage_upgrade: True
diff --git a/roles/nginx/templates/ansible_conf.d/30-vhosts.conf.j2 b/roles/nginx/templates/ansible_conf.d/30-vhosts.conf.j2
index c7a30bd..4d0afd9 100644
--- a/roles/nginx/templates/ansible_conf.d/30-vhosts.conf.j2
+++ b/roles/nginx/templates/ansible_conf.d/30-vhosts.conf.j2
@@ -87,6 +87,9 @@ server {
     fastcgi_param HOST $http_host;
     # Keep original request (LLNG server will received /llauth)
     fastcgi_param X_ORIGINAL_URI  $request_uri;
+    # Use bigger buffers (see GLPI #49915)
+    fastcgi_buffers 16 32k;
+    fastcgi_buffer_size 64k;
 {% if vhost.auth == 'llng_basic' %}
     # Use basic auth on this vhost
     fastcgi_param VHOSTTYPE AuthBasic;