diff --git a/CHANGELOG.md b/CHANGELOG.md
index 2850b5d3..3d43f1dc 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,8 @@ Version 1.2.3
 - Disabled uploading mods to the master server by default as this is mostly
   just a waste of bandwidth with the mod portal being integrated into the
   game now.
+- Fixed researchSync breaking with heavily modded games due to the tech tree
+  exceeding the default 100kb limit on JSON payloads.
 
 
 Version 1.2.2
diff --git a/master.js b/master.js
index 568f2e66..2fb5aee8 100644
--- a/master.js
+++ b/master.js
@@ -83,7 +83,9 @@ const fileUpload = require('express-fileupload');
 var app = express();
 
 app.use(cookieParser());
-app.use(bodyParser.json());
+app.use(bodyParser.json({
+	limit: '10mb',
+}));
 app.use(bodyParser.urlencoded({
 	parameterLimit: 100000,
 	limit: '10mb',