diff --git a/arduino-ide-browser/package.json b/arduino-ide-browser/package.json
index 62f63b16..97b3f9e1 100644
--- a/arduino-ide-browser/package.json
+++ b/arduino-ide-browser/package.json
@@ -31,7 +31,7 @@
         "frontend": {
             "config": {
                 "applicationName": "Arduino-PoC",
-                "defaultTheme": "arduino"
+                "defaultTheme": "arduino-theme"
             }
         }
     }
diff --git a/arduino-ide-electron/package.json b/arduino-ide-electron/package.json
index 8dae9587..276e9a21 100644
--- a/arduino-ide-electron/package.json
+++ b/arduino-ide-electron/package.json
@@ -33,7 +33,7 @@
         "frontend": {
             "config": {
                 "applicationName": "Arduino-PoC",
-                "defaultTheme": "arduino"
+                "defaultTheme": "arduino-theme"
             }
         }
     }