diff --git a/bunfig.toml b/bunfig.toml
deleted file mode 100644
index 5669a07..0000000
--- a/bunfig.toml
+++ /dev/null
@@ -1,13 +0,0 @@
-# Bun configuration for tstest
-# This enables TypeScript decorator support in Bun runtime
-
-[build]
-target = "bun"
-
-[test]
-preload = []
-
-# Enable decorators for Bun's TypeScript transpiler
-# This ensures user code with decorators works when executed via Bun
-[transpiler]
-experimentalDecorators = true
diff --git a/changelog.md b/changelog.md
index 7b94b63..7aa093b 100644
--- a/changelog.md
+++ b/changelog.md
@@ -1,5 +1,11 @@
 # Changelog
 
+## 2025-11-17 - 2.8.1 - fix(config)
+Remove Bun config file and set deno.json useDefineForClassFields to false for compatibility
+
+- Removed bunfig.toml (Bun-specific TypeScript decorator configuration) — stops shipping a project-local Bun transpiler config.
+- Updated deno.json: set compilerOptions.useDefineForClassFields = false to keep legacy class field semantics and avoid runtime/emit incompatibilities in Deno.
+
 ## 2025-11-17 - 2.8.0 - feat(runtime-adapters)
 Enable TypeScript decorator support for Deno and Bun runtimes and add decorator tests
 
diff --git a/deno.json b/deno.json
index bcd90e4..18418e8 100644
--- a/deno.json
+++ b/deno.json
@@ -1,6 +1,7 @@
 {
   "compilerOptions": {
     "experimentalDecorators": true,
+    "useDefineForClassFields": false,
     "lib": [
       "ES2022",
       "DOM"
diff --git a/ts/00_commitinfo_data.ts b/ts/00_commitinfo_data.ts
index b6e5e05..024851c 100644
--- a/ts/00_commitinfo_data.ts
+++ b/ts/00_commitinfo_data.ts
@@ -3,6 +3,6 @@
  */
 export const commitinfo = {
   name: '@git.zone/tstest',
-  version: '2.8.0',
+  version: '2.8.1',
   description: 'a test utility to run tests that match test/**/*.ts'
 }