diff --git a/.codecov.yml b/.codecov.yml
new file mode 100644
index 0000000..800669f
--- /dev/null
+++ b/.codecov.yml
@@ -0,0 +1,12 @@
+codecov:
+  ci:
+    - dev.azure.com
+
+ignore:
+  - "**/*/dist/*.js"
+  - "**/*.{spec,test}.js"
+  - "**/*.eslintrc.js"
+
+parsers:
+  javascript:
+    enable_partials: yes
diff --git a/README.md b/README.md
index e3e4bec..1676bfa 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,5 @@
 [![Build Status](https://dev.azure.com/pegjs/pegjs/_apis/build/status/Azure%20Pipelines?branchName=master)](https://dev.azure.com/pegjs/pegjs/_build/latest?definitionId=1?branchName=master)
-[![coverage](https://img.shields.io/coveralls/github/pegjs/pegjs.svg)](https://coveralls.io/github/pegjs/pegjs)
+[![Codecov](https://codecov.io/gh/pegjs/pegjs/branch/master/graph/badge.svg)](https://codecov.io/gh/pegjs/pegjs)
 [![Maintainability](https://api.codeclimate.com/v1/badges/2d1f0313dea3e28e191f/maintainability)](https://codeclimate.com/github/pegjs/pegjs/maintainability)
 [![forum](https://gitq.com/badge.svg)](https://gitq.com/pegjs/pegjs)
 [![license](https://img.shields.io/badge/license-mit-blue.svg)](https://opensource.org/licenses/MIT)
diff --git a/package.json b/package.json
index 7ec2bdb..5232ec4 100644
--- a/package.json
+++ b/package.json
@@ -19,10 +19,10 @@
         "impact": "node tools/impact master",
         "now-build": "npm run build-docs",
         "ci": "npm run lint && npm run test",
-        "coverage": "nyc report --reporter=text-lcov | coveralls"
+        "coverage": "nyc report --reporter=text-lcov > coverage.lcov && codecov"
     },
     "dependencies": {
-        "coveralls": "3.0.2",
+        "codecov": "3.1.0",
         "eslint": "5.13.0",
         "eslint-config-futagozaryuu": "5.6.1",
         "eslint-plugin-vue": "5.1.0",
diff --git a/yarn.lock b/yarn.lock
index c7b0332..862dd21 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1252,6 +1252,11 @@ 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"
+  integrity sha1-7L0W+JSbFXGDcRsb2jNPN4QBhas=
+
 arr-diff@^4.0.0:
   version "4.0.0"
   resolved "https://registry.yarnpkg.com/arr-diff/-/arr-diff-4.0.0.tgz#d6461074febfec71e7e15235761a329a5dc7c520"
@@ -2017,6 +2022,17 @@ code-point-at@^1.0.0:
   resolved "https://registry.yarnpkg.com/code-point-at/-/code-point-at-1.1.0.tgz#0d070b4d043a5bea33a2f1a40e2edb3d9a4ccf77"
   integrity sha1-DQcLTQQ6W+ozovGkDi7bPZpMz3c=
 
+codecov@3.1.0:
+  version "3.1.0"
+  resolved "https://registry.yarnpkg.com/codecov/-/codecov-3.1.0.tgz#340bd968d361f256976b5af782dd8ba9f82bc849"
+  integrity sha512-aWQc/rtHbcWEQLka6WmBAOpV58J2TwyXqlpAQGhQaSiEUoigTTUk6lLd2vB3kXkhnDyzyH74RXfmV4dq2txmdA==
+  dependencies:
+    argv "^0.0.2"
+    ignore-walk "^3.0.1"
+    js-yaml "^3.12.0"
+    request "^2.87.0"
+    urlgrey "^0.4.4"
+
 collection-visit@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/collection-visit/-/collection-visit-1.0.0.tgz#4bc0373c164bc3291b4d368c829cf1a80a59dca0"
@@ -2256,18 +2272,6 @@ cosmiconfig@^4.0.0:
     parse-json "^4.0.0"
     require-from-string "^2.0.1"
 
-coveralls@3.0.2:
-  version "3.0.2"
-  resolved "https://registry.yarnpkg.com/coveralls/-/coveralls-3.0.2.tgz#f5a0bcd90ca4e64e088b710fa8dda640aea4884f"
-  integrity sha512-Tv0LKe/MkBOilH2v7WBiTBdudg2ChfGbdXafc/s330djpF3zKOmuehTeRwjXWc7pzfj9FrDUTA7tEx6Div8NFw==
-  dependencies:
-    growl "~> 1.10.0"
-    js-yaml "^3.11.0"
-    lcov-parse "^0.0.10"
-    log-driver "^1.2.7"
-    minimist "^1.2.0"
-    request "^2.85.0"
-
 create-ecdh@^4.0.0:
   version "4.0.3"
   resolved "https://registry.yarnpkg.com/create-ecdh/-/create-ecdh-4.0.3.tgz#c9111b6f33045c4697f144787f9254cdc77c45ff"
@@ -3718,7 +3722,7 @@ gray-matter@^4.0.1:
     section-matter "^1.0.0"
     strip-bom-string "^1.0.0"
 
-growl@1.10.5, "growl@~> 1.10.0":
+growl@1.10.5:
   version "1.10.5"
   resolved "https://registry.yarnpkg.com/growl/-/growl-1.10.5.tgz#f2735dc2283674fa67478b10181059355c369e5e"
   integrity sha512-qBr4OuELkhPenW6goKVXiv47US3clb3/IbuWF9KNKEijAy9oeHxU9IgzjvJhHkUzhaj7rOUD7+YGWqUjLp5oSA==
@@ -4657,11 +4661,6 @@ lcid@^2.0.0:
   dependencies:
     invert-kv "^2.0.0"
 
-lcov-parse@^0.0.10:
-  version "0.0.10"
-  resolved "https://registry.yarnpkg.com/lcov-parse/-/lcov-parse-0.0.10.tgz#1b0b8ff9ac9c7889250582b70b71315d9da6d9a3"
-  integrity sha1-GwuP+ayceIklBYK3C3ExXZ2m2aM=
-
 levn@^0.3.0, levn@~0.3.0:
   version "0.3.0"
   resolved "https://registry.yarnpkg.com/levn/-/levn-0.3.0.tgz#3b09924edf9f083c0490fdd4c0bc4421e04764ee"
@@ -4797,11 +4796,6 @@ lodash@^4.16.4, lodash@^4.17.10, lodash@^4.17.11, lodash@^4.17.3, lodash@^4.17.4
   resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.11.tgz#b39ea6229ef607ecd89e2c8df12536891cac9b8d"
   integrity sha512-cQKh8igo5QUhZ7lg38DYWAxMvjSAKG0A8wGSVimP07SIUEK2UO+arSRKbRZWtelMtN5V0Hkwh5ryOto/SshYIg==
 
-log-driver@^1.2.7:
-  version "1.2.7"
-  resolved "https://registry.yarnpkg.com/log-driver/-/log-driver-1.2.7.tgz#63b95021f0702fedfa2c9bb0a24e7797d71871d8"
-  integrity sha512-U7KCmLdqsGHBLeWqYlFA0V0Sl6P08EE1ZrmA9cxjUE0WVqT9qnyVDPz1kzpFEP0jdJuFnasWIfSd7fsaNXkpbg==
-
 log-update@^2.3.0:
   version "2.3.0"
   resolved "https://registry.yarnpkg.com/log-update/-/log-update-2.3.0.tgz#88328fd7d1ce7938b29283746f0b1bc126b24708"
@@ -6659,7 +6653,7 @@ repeat-string@^1.6.1:
   resolved "https://registry.yarnpkg.com/repeat-string/-/repeat-string-1.6.1.tgz#8dcae470e1c88abc2d600fff4a776286da75e637"
   integrity sha1-jcrkcOHIirwtYA//Sndihtp15jc=
 
-request@^2.85.0, request@^2.87.0:
+request@^2.87.0:
   version "2.88.0"
   resolved "https://registry.yarnpkg.com/request/-/request-2.88.0.tgz#9c2fca4f7d35b592efe57c7f0a55e81052124fef"
   integrity sha512-NAqBSrijGLZdM0WZNsInLJpkJokL72XYjUpnB0iwsRgxh7dB6COrHnTBNwN0E+lHDAJzu7kLAkDeY08z2/A0hg==
@@ -7806,6 +7800,11 @@ url@^0.11.0:
     punycode "1.3.2"
     querystring "0.2.0"
 
+urlgrey@^0.4.4:
+  version "0.4.4"
+  resolved "https://registry.yarnpkg.com/urlgrey/-/urlgrey-0.4.4.tgz#892fe95960805e85519f1cd4389f2cb4cbb7652f"
+  integrity sha1-iS/pWWCAXoVRnxzUOJ8stMu3ZS8=
+
 use@^3.1.0:
   version "3.1.1"
   resolved "https://registry.yarnpkg.com/use/-/use-3.1.1.tgz#d50c8cac79a19fbc20f2911f56eb973f4e10070f"