diff --git a/lib/logger/index.ts b/lib/logger/index.ts
index 67b21a87d312fa08c7fc7e1ea9ffea899b43b679..b0d7012b095f924f79f5d9e722074dce3264204b 100644
--- a/lib/logger/index.ts
+++ b/lib/logger/index.ts
@@ -42,6 +42,8 @@ const bunyanLogger = bunyan.createLogger({
     migratedConfig: configSerializer,
     originalConfig: configSerializer,
     presetConfig: configSerializer,
+    oldConfig: configSerializer,
+    newConfig: configSerializer,
     err: errSerializer,
   },
   streams: [