diff --git a/lib/runtimeSettings.js b/lib/runtimeSettings.js
index 3abdbe9..02149d8 100644
--- a/lib/runtimeSettings.js
+++ b/lib/runtimeSettings.js
@@ -1,4 +1,5 @@
 const path = require('path')
+const bytes = require('bytes')
 function getSettingsFile (settings) {
     const projectSettings = {
         credentialSecret: '',
@@ -71,6 +72,13 @@ function getSettingsFile (settings) {
             } else if (!authMiddlewareRequired && settings.settings.dashboardIFrame) {
                 dashboardSettings.push('middleware: [ DashboardIFrameMiddleware ]')
             }
+            if (settings.settings.apiMaxLength) {
+                try {
+                    dashboardSettings.push(`maxHttpBufferSize: ${bytes(settings.settings.apiMaxLength)}`)
+                } catch (err) {
+                    // failed to parse
+                }
+            }
             projectSettings.dashboardUI = `ui: { ${dashboardSettings.join(', ')}},`
         }
         if (settings.settings.disableEditor !== undefined) {
diff --git a/package-lock.json b/package-lock.json
index a12cace..5332a47 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -14,6 +14,7 @@
                 "@flowfuse/nr-project-nodes": "^0.7.4",
                 "@node-red/util": "^3.1.0",
                 "body-parser": "^1.20.2",
+                "bytes": "^3.1.2",
                 "command-line-args": "^5.2.1",
                 "express": "^4.21.0",
                 "express-session": "^1.18.0",
diff --git a/package.json b/package.json
index da07849..0eb86b9 100644
--- a/package.json
+++ b/package.json
@@ -49,6 +49,7 @@
         "@flowfuse/nr-project-nodes": "^0.7.4",
         "@node-red/util": "^3.1.0",
         "body-parser": "^1.20.2",
+        "bytes": "^3.1.2",
         "command-line-args": "^5.2.1",
         "express": "^4.21.0",
         "express-session": "^1.18.0",
diff --git a/test/unit/lib/runtimeSettings_spec.js b/test/unit/lib/runtimeSettings_spec.js
index 027589b..b2b2801 100644
--- a/test/unit/lib/runtimeSettings_spec.js
+++ b/test/unit/lib/runtimeSettings_spec.js
@@ -135,7 +135,7 @@ describe('Runtime Settings', function () {
             const settings = await loadSettings(result)
             settings.should.have.property('credentialSecret', 'foo')
             settings.should.have.property('httpAdminRoot', '/red')
-            settings.should.have.property('ui', { path: '/dash' })
+            settings.should.have.property('ui', { path: '/dash', maxHttpBufferSize: 123 })
             settings.should.have.property('disableEditor', true)
             settings.should.have.property('apiMaxLength', '123')
             settings.should.have.property('debugMaxLength', 456)