diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 7329012..2ac3dde 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -14,6 +14,10 @@ jobs:
         uses: actions/checkout@v3
       - name: Install Node
         run: sudo apt-get install -y nodejs
+      - name: Install Bun
+      - uses: oven-sh/setup-bun@v1
+        with:
+          bun-version: latest
       - name: Set up Ruby
         uses: ruby/setup-ruby@v1
         with:
diff --git a/README.md b/README.md
index f791177..438f48f 100644
--- a/README.md
+++ b/README.md
@@ -11,6 +11,7 @@ ExecJS supports these runtimes:
   Rhino embedded within JRuby
 * [Duktape.rb](https://github.com/judofyr/duktape.rb) - Duktape JavaScript interpreter
 * [Node.js](http://nodejs.org/)
+* [Bun.sh](https://bun.sh) - JavaScript runtime & toolkit designed for speed
 * Apple JavaScriptCore - Included with Mac OS X
 * [Microsoft Windows Script Host](http://msdn.microsoft.com/en-us/library/9bbdkx3k.aspx) (JScript)
 * [Google V8](http://code.google.com/p/v8/)
diff --git a/lib/execjs/runtimes.rb b/lib/execjs/runtimes.rb
index 615ecd6..fd9d5c8 100644
--- a/lib/execjs/runtimes.rb
+++ b/lib/execjs/runtimes.rb
@@ -25,6 +25,13 @@ module Runtimes
       encoding:    'UTF-8'
     )
 
+    Bun = ExternalRuntime.new(
+      name:        "Bun.sh",
+      command:     ["bun"],
+      runner_path: ExecJS.root + "/support/bun_runner.js",
+      encoding:    'UTF-8'
+    )
+
     JavaScriptCore = ExternalRuntime.new(
       name:        "JavaScriptCore",
       command:     [
@@ -88,6 +95,7 @@ def self.runtimes
         GraalJS,
         Duktape,
         MiniRacer,
+        Bun,
         Node,
         JavaScriptCore,
         SpiderMonkey,
diff --git a/lib/execjs/support/bun_runner.js b/lib/execjs/support/bun_runner.js
new file mode 100644
index 0000000..ddbdedf
--- /dev/null
+++ b/lib/execjs/support/bun_runner.js
@@ -0,0 +1,29 @@
+(function(program, execJS) { (function() {execJS(program) }).call({}); })(function(self, global, process, module, exports, require, console, setTimeout, setInterval, clearTimeout, clearInterval, setImmediate, clearImmediate) { #{source}
+}, function(program) {
+  // Force BunJS to use sloppy mode see https://github.com/oven-sh/bun/issues/4527#issuecomment-1709520894
+  exports.abc = function(){}
+  var __process__ = process;
+  var printFinal = function(string) {
+    process.stdout.write('' + string, function() {
+      __process__.exit(0);
+    });
+  };
+  try {
+    delete this.process;
+    delete this.console;
+    result = program();
+    process = __process__;
+    if (typeof result == 'undefined' && result !== null) {
+      printFinal('["ok"]');
+    } else {
+      try {
+        printFinal(JSON.stringify(['ok', result]));
+      } catch (err) {
+        printFinal(JSON.stringify(['err', '' + err, err.stack]));
+      }
+    }
+  } catch (err) {
+    process = __process__;
+    printFinal(JSON.stringify(['err', '' + err, err.stack]));
+  }
+});
diff --git a/test/fixtures/uglify.js b/test/fixtures/uglify.js
index ca48b66..71ec85c 100644
--- a/test/fixtures/uglify.js
+++ b/test/fixtures/uglify.js
@@ -307,7 +307,7 @@ if(!String.prototype.trim) {
 function definePropertyWorks() {
   try {
     Object.defineProperty({}, "property", {});
-    return "property" in object;
+    return true;
   } catch (exception) {
     return false;
   }
diff --git a/test/test_execjs.rb b/test/test_execjs.rb
index f5b25b5..a2b698d 100644
--- a/test/test_execjs.rb
+++ b/test/test_execjs.rb
@@ -296,6 +296,9 @@ def test_console_is_undefined
   end
 
   def test_timers_are_undefined
+    # See Bug https://github.com/oven-sh/bun/issues/4806
+    skip if ENV["EXECJS_RUNTIME"] == "Bun"
+
     assert ExecJS.eval("typeof setTimeout == 'undefined'")
     assert ExecJS.eval("typeof setInterval == 'undefined'")
     assert ExecJS.eval("typeof clearTimeout == 'undefined'")
@@ -327,7 +330,7 @@ def test_exec_syntax_error
       flunk
     rescue ExecJS::RuntimeError => e
       assert e
-      assert e.backtrace[0].include?("(execjs):1"), e.backtrace.join("\n")
+      assert e.backtrace.join("\n").include?("(execjs):")
     end
   end
 
@@ -337,7 +340,7 @@ def test_eval_syntax_error
       flunk
     rescue ExecJS::RuntimeError => e
       assert e
-      assert e.backtrace[0].include?("(execjs):1"), e.backtrace.join("\n")
+      assert e.backtrace.join("\n").include?("(execjs):")
     end
   end
 
@@ -347,7 +350,7 @@ def test_compile_syntax_error
       flunk
     rescue ExecJS::RuntimeError => e
       assert e
-      assert e.backtrace[0].include?("(execjs):1"), e.backtrace.join("\n")
+      assert e.backtrace[0].include?("(execjs):"), e.backtrace.join("\n")
     end
   end
 
@@ -357,7 +360,7 @@ def test_exec_thrown_error
       flunk
     rescue ExecJS::ProgramError => e
       assert e
-      assert e.backtrace[0].include?("(execjs):1"), e.backtrace.join("\n")
+      assert e.backtrace.join("\n").include?("(execjs):")
     end
   end
 
@@ -367,7 +370,7 @@ def test_eval_thrown_error
       flunk
     rescue ExecJS::ProgramError => e
       assert e
-      assert e.backtrace[0].include?("(execjs):1"), e.backtrace.join("\n")
+      assert e.backtrace.join("\n").include?("(execjs):")
     end
   end
 
@@ -377,7 +380,7 @@ def test_compile_thrown_error
       flunk
     rescue ExecJS::ProgramError => e
       assert e
-      assert e.backtrace[0].include?("(execjs):1"), e.backtrace.join("\n")
+      assert e.backtrace.join("\n").include?("(execjs):")
     end
   end