diff --git a/.travis.yml b/.travis.yml
index 314f134..4bcb26c 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -15,3 +15,5 @@ install:
   - yarn
 script:
   - yarn test
+after_script:
+  - yarn run codecov
diff --git a/package.json b/package.json
index 031110c..44cd015 100644
--- a/package.json
+++ b/package.json
@@ -16,6 +16,7 @@
     "babel-preset-es2015": "^6.18.0",
     "babel-register": "^6.18.0",
     "chai": "^3.5.0",
+    "codecov": "^1.0.1",
     "cross-env": "^3.1.3",
     "css-loader": "^0.25.0",
     "doctoc": "^1.2.0",
@@ -69,6 +70,7 @@
     "type": "git"
   },
   "scripts": {
+    "codecov": "codecov",
     "build": "rollup -c",
     "dev": "babel-node examples/server.js",
     "lint": "standard --verbose | snazzy",
diff --git a/yarn.lock b/yarn.lock
index 2ed7a9b..82102ce 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -109,6 +109,10 @@ argparse@^1.0.7:
   dependencies:
     sprintf-js "~1.0.2"
 
+argv@>=0.0.2:
+  version "0.0.2"
+  resolved "https://registry.yarnpkg.com/argv/-/argv-0.0.2.tgz#ecbd16f8949b157183711b1bda334f37840185ab"
+
 arr-diff@^2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/arr-diff/-/arr-diff-2.0.0.tgz#8f3b827f955a8bd669697e4a4256ac3ceae356cf"
@@ -1095,6 +1099,15 @@ code-point-at@^1.0.0:
   dependencies:
     number-is-nan "^1.0.0"
 
+codecov:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/codecov/-/codecov-1.0.1.tgz#97260ceac0e96b8eda8d562006558a53a139dffd"
+  dependencies:
+    argv ">=0.0.2"
+    execSync "1.0.2"
+    request ">=2.42.0"
+    urlgrey ">=0.4.0"
+
 collapse-white-space@^1.0.0:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/collapse-white-space/-/collapse-white-space-1.0.2.tgz#9c463fb9c6d190d2dcae21a356a01bcae9eeef6d"
@@ -1939,6 +1952,12 @@ evp_bytestokey@^1.0.0:
   dependencies:
     create-hash "^1.1.1"
 
+execSync@1.0.2:
+  version "1.0.2"
+  resolved "https://registry.yarnpkg.com/execSync/-/execSync-1.0.2.tgz#1f42eda582225180053224ecdd3fd1960fdb3139"
+  dependencies:
+    temp "~0.5.1"
+
 exit-hook@^1.0.0:
   version "1.1.1"
   resolved "https://registry.yarnpkg.com/exit-hook/-/exit-hook-1.1.1.tgz#f05ca233b48c05d54fff07765df8507e95c02ff8"
@@ -2344,6 +2363,10 @@ graceful-fs@^4.1.2, graceful-fs@^4.1.4, graceful-fs@^4.1.6, graceful-fs@^4.1.9:
   version "4.1.9"
   resolved "https://registry.yarnpkg.com/graceful-fs/-/graceful-fs-4.1.9.tgz#baacba37d19d11f9d146d3578bc99958c3787e29"
 
+graceful-fs@~1:
+  version "1.2.3"
+  resolved "https://registry.yarnpkg.com/graceful-fs/-/graceful-fs-1.2.3.tgz#15a4806a57547cb2d2dbf27f42e89a8c3451b364"
+
 "graceful-readlink@>= 1.0.0":
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/graceful-readlink/-/graceful-readlink-1.0.1.tgz#4cafad76bc62f02fa039b2f94e9a3dd3a391a725"
@@ -4365,7 +4388,7 @@ request-progress@~2.0.1:
   dependencies:
     throttleit "^1.0.0"
 
-request@^2.75.0:
+request@^2.75.0, request@>=2.42.0:
   version "2.76.0"
   resolved "https://registry.yarnpkg.com/request/-/request-2.76.0.tgz#be44505afef70360a0436955106be3945d95560e"
   dependencies:
@@ -4462,6 +4485,12 @@ rimraf@^2.2.8, rimraf@^2.3.3, rimraf@^2.5.4, rimraf@~2.5.1, rimraf@~2.5.4, rimra
   dependencies:
     glob "^7.0.5"
 
+rimraf@~2.1.4:
+  version "2.1.4"
+  resolved "https://registry.yarnpkg.com/rimraf/-/rimraf-2.1.4.tgz#5a6eb62eeda068f51ede50f29b3e5cd22f3d9bb2"
+  optionalDependencies:
+    graceful-fs "~1"
+
 ripemd160@^1.0.0:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/ripemd160/-/ripemd160-1.0.1.tgz#93a4bbd4942bc574b69a8fa57c71de10ecca7d6e"
@@ -4960,6 +4989,12 @@ tar@~2.2.1:
     fstream "^1.0.2"
     inherits "2"
 
+temp@~0.5.1:
+  version "0.5.1"
+  resolved "https://registry.yarnpkg.com/temp/-/temp-0.5.1.tgz#77ab19c79aa7b593cbe4fac2441768cad987b8df"
+  dependencies:
+    rimraf "~2.1.4"
+
 test-exclude@^2.1.1:
   version "2.1.3"
   resolved "https://registry.yarnpkg.com/test-exclude/-/test-exclude-2.1.3.tgz#a8d8968e1da83266f9864f2852c55e220f06434a"
@@ -5173,6 +5208,10 @@ url@~0.11.0:
     punycode "1.3.2"
     querystring "0.2.0"
 
+urlgrey@>=0.4.0:
+  version "0.4.4"
+  resolved "https://registry.yarnpkg.com/urlgrey/-/urlgrey-0.4.4.tgz#892fe95960805e85519f1cd4389f2cb4cbb7652f"
+
 user-home@^1.1.1:
   version "1.1.1"
   resolved "https://registry.yarnpkg.com/user-home/-/user-home-1.1.1.tgz#2b5be23a32b63a7c9deb8d0f28d485724a3df190"