diff --git a/changelog.d/7251.doc b/changelog.d/7251.doc
new file mode 100644
index 0000000000..596a28e65d
--- /dev/null
+++ b/changelog.d/7251.doc
@@ -0,0 +1 @@
+Modify suggested nginx reverse proxy configuration to match Synapse's default file upload size. Contributed by @ProCycleDev.
diff --git a/docs/reverse_proxy.md b/docs/reverse_proxy.md
index af6d73927a..c7222f73b9 100644
--- a/docs/reverse_proxy.md
+++ b/docs/reverse_proxy.md
@@ -42,6 +42,9 @@ the reverse proxy and the homeserver.
             location /_matrix {
                 proxy_pass http://localhost:8008;
                 proxy_set_header X-Forwarded-For $remote_addr;
+                # Nginx by default only allows file uploads up to 1M in size
+                # Increase client_max_body_size to match max_upload_size defined in homeserver.yaml
+                client_max_body_size 10M;
             }
         }