diff --git a/.airtap.yml b/.airtap.yml
index c7a8a87..7b2c3e6 100644
--- a/.airtap.yml
+++ b/.airtap.yml
@@ -13,3 +13,7 @@ browsers:
     version: 9..latest
   - name: microsoftedge
     version: 13..latest
+browserify:
+  # IE 9/10 compatibility
+  - require: 'buffer/'
+    expose: 'buffer'
diff --git a/.travis.yml b/.travis.yml
index 486dc3c..0b3107c 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -5,9 +5,11 @@ node_js:
   - 'stable'
   - 'lts/*'
   - '0.12'
+before_install:
+  - 'if [ "${TRAVIS_NODE_VERSION}" == "0.12" ]; then nvm install-latest-npm; fi'
 script:
-  - npm test
-  - if [ "${TRAVIS_PULL_REQUEST}" = "false" ] && [ "${TRAVIS_NODE_VERSION}" = "stable" ]; then npm run test:browsers; fi
+  - 'npm test'
+  - 'if [ "${TRAVIS_PULL_REQUEST}" = "false" ] && [ "${TRAVIS_NODE_VERSION}" = "stable" ]; then npm run test:browsers; fi'
 addons:
   sauce_connect: true
   hosts:
diff --git a/package.json b/package.json
index 6d8c770..7681c0f 100644
--- a/package.json
+++ b/package.json
@@ -22,7 +22,8 @@
     "node": ">=0.8.x"
   },
   "devDependencies": {
-    "airtap": "^1.0.0",
+    "airtap": "^4.0.1",
+    "buffer": "^4.9.2",
     "functions-have-names": "^1.2.1",
     "has": "^1.0.3",
     "has-symbols": "^1.0.1",