diff --git a/DEPLOY.md b/DEPLOY.md
index 1c7d1af5..51f310e3 100644
--- a/DEPLOY.md
+++ b/DEPLOY.md
@@ -214,6 +214,9 @@ server {
     server_name your.server.name; # EDIT THIS
     merge_slashes off;
 
+    # Nginx defaults to only allow 1MB uploads
+    client_max_body_size 20M;
+
     location /_matrix/ {
         proxy_pass http://127.0.0.1:6167$request_uri;
         proxy_set_header Host $http_host;