diff --git a/src/Adapter.js b/src/Adapter.js
index f18f26c..15b13db 100644
--- a/src/Adapter.js
+++ b/src/Adapter.js
@@ -182,7 +182,7 @@ class Adapter {
   }
 
   static serializeUUID (uuid) {
-    return `dev_${uuid.replace(/:/g, '_')}`
+    return `dev_${uuid.replace(/:/g, '_').toUpperCase()}`
   }
 
   static deserializeUUID (uuid) {
diff --git a/test/Adapter.spec.js b/test/Adapter.spec.js
index 3c1c8a5..752c6ae 100644
--- a/test/Adapter.spec.js
+++ b/test/Adapter.spec.js
@@ -10,6 +10,7 @@ const Device = require('../src/Device')
 
 test('serializeUUID', () => {
   expect(Adapter.serializeUUID('00:00:00:00:00:00')).toEqual('dev_00_00_00_00_00_00')
+  expect(Adapter.serializeUUID('aa:BB:cc:DD:ee:FF')).toEqual('dev_AA_BB_CC_DD_EE_FF')
 })
 
 test('deserializeUUID', () => {