diff --git a/changelog.d/3883.feature b/changelog.d/3883.feature
new file mode 100644
index 0000000000..c11e5c5309
--- /dev/null
+++ b/changelog.d/3883.feature
@@ -0,0 +1 @@
+Adding the ability to change MAX_UPLOAD_SIZE for the docker container variables.
\ No newline at end of file
diff --git a/docker/README.md b/docker/README.md
index 038c78f7c0..3c00d1e948 100644
--- a/docker/README.md
+++ b/docker/README.md
@@ -88,6 +88,7 @@ variables are available for configuration:
 * ``SYNAPSE_TURN_URIS``, set this variable to the coma-separated list of TURN
   uris to enable TURN for this homeserver.
 * ``SYNAPSE_TURN_SECRET``, set this to the TURN shared secret if required.
+* ``SYNAPSE_MAX_UPLOAD_SIZE``, set this variable to change the max upload size [default `10M`].
 
 Shared secrets, that will be initialized to random values if not set:
 
diff --git a/docker/conf/homeserver.yaml b/docker/conf/homeserver.yaml
index 6bc25bb45f..cfe88788f2 100644
--- a/docker/conf/homeserver.yaml
+++ b/docker/conf/homeserver.yaml
@@ -85,7 +85,7 @@ federation_rc_concurrent: 3
 
 media_store_path: "/data/media"
 uploads_path: "/data/uploads"
-max_upload_size: "10M"
+max_upload_size: "{{ SYNAPSE_MAX_UPLOAD_SIZE or "10M" }}"
 max_image_pixels: "32M"
 dynamic_thumbnails: false