diff --git a/docker/startup.sh b/docker/startup.sh
index 70dace264..dcede3df6 100644
--- a/docker/startup.sh
+++ b/docker/startup.sh
@@ -47,6 +47,7 @@ if [ -v "PHP_UPLOAD_LIMIT" ]
 then
     echo "Changing upload limit to ${PHP_UPLOAD_LIMIT}"
     sed -i "s/^upload_max_filesize.*/upload_max_filesize = ${PHP_UPLOAD_LIMIT}M/" /etc/php/*/apache2/php.ini
+    sed -i "s/^post_max_size.*/post_max_size = ${PHP_UPLOAD_LIMIT}M/" /etc/php/*/apache2/php.ini
 fi
 
 # If the Oauth DB files are not present copy the vendor files over to the db migrations