diff --git a/package.json b/package.json
index dd8185419..872927488 100644
--- a/package.json
+++ b/package.json
@@ -25,7 +25,7 @@
     "browser-pack": "^6.0.1",
     "browser-resolve": "^1.11.0",
     "browserify-zlib": "~0.1.2",
-    "buffer": "^4.1.0",
+    "buffer": "^5.0.2",
     "cached-path-relative": "^1.0.0",
     "concat-stream": "~1.5.1",
     "console-browserify": "^1.1.0",
diff --git a/test/double_buffer.js b/test/double_buffer.js
index 1535eb9b1..37fc6f307 100644
--- a/test/double_buffer.js
+++ b/test/double_buffer.js
@@ -9,6 +9,6 @@ test('double buffer', function (t) {
     b.require('buffer');
     b.bundle(function (err, src) {
         if (err) return t.fail(err);
-        vm.runInNewContext(src, { t: t });
+        vm.runInNewContext(src, { t: t, Uint8Array: Uint8Array });
     });
 });
diff --git a/test/global.js b/test/global.js
index b860abb86..7c5114530 100644
--- a/test/global.js
+++ b/test/global.js
@@ -26,7 +26,7 @@ test('__filename and __dirname with insertGlobals: true', function (t) {
     });
     b.require(__dirname + '/global/filename.js', { expose: 'x' });
     b.bundle(function (err, src) {
-        var c = {};
+        var c = { Uint8Array: Uint8Array };
         c.self = c;
         vm.runInNewContext(src, c);
         var x = c.require('x');
diff --git a/test/leak.js b/test/leak.js
index 7479640c6..780e6d001 100644
--- a/test/leak.js
+++ b/test/leak.js
@@ -52,6 +52,6 @@ test('leaking information about system paths (Buffer)', function (t) {
         t.equal(src.indexOf(dirstring), -1, 'temp directory visible');
         t.equal(src.indexOf(process.cwd()), -1, 'cwd directory visible');
         t.equal(src.indexOf('/home'), -1, 'home directory visible');
-        vm.runInNewContext(src, { t: t, setTimeout: setTimeout });
+        vm.runInNewContext(src, { t: t, setTimeout: setTimeout, Uint8Array: Uint8Array });
     });
 });