diff --git a/.circleci/config.yml b/.circleci/config.yml
index 254703b..6c3ac5d 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -2,7 +2,9 @@
 #
 # Check https://circleci.com/docs/2.0/language-java/ for more details
 #
-version: 2
+version: 2.1
+orbs:
+  codecov: codecov/codecov@1.0.5
 jobs:
   build:
     docker:
@@ -42,3 +44,5 @@ jobs:
       - run: gradle ktlintCheck
       # run tests!
       - run: gradle test
+      # upload coverages to codecov
+      - run: bash <(curl -s https://codecov.io/bash)
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..135ec82
--- /dev/null
+++ b/README.md
@@ -0,0 +1,9 @@
+[![License](https://img.shields.io/badge/License-Apache%202.0-blue.svg)](https://opensource.org/licenses/Apache-2.0)
+[![CircleCI](https://circleci.com/gh/ProjectMapK/Shared.svg?style=svg)](https://circleci.com/gh/ProjectMapK/Shared)
+[![](https://jitci.com/gh/ProjectMapK/Shared/svg)](https://jitci.com/gh/ProjectMapK/Shared)
+[![codecov](https://codecov.io/gh/ProjectMapK/Shared/branch/master/graph/badge.svg)](https://codecov.io/gh/ProjectMapK/Shared)
+
+A `Shared` module for ProjectMapK.
+====
+You can use this module to easily make function calls by `Kotlin`'s `Reflection`.
+Also, you can use the features of ProjectMapK in this module.
diff --git a/build.gradle.kts b/build.gradle.kts
index 905b321..dabf2ec 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -3,6 +3,7 @@ plugins {
     id("java")
     id("org.jetbrains.kotlin.jvm") version "1.3.72"
     id("org.jlleitschuh.gradle.ktlint") version "9.2.1"
+    id("jacoco")
 }
 
 group = "com.mapk"
@@ -57,5 +58,15 @@ tasks {
     }
     test {
         useJUnitPlatform()
+        // テスト終了時にjacocoのレポートを生成する
+        finalizedBy(jacocoTestReport)
+    }
+
+    jacocoTestReport {
+        reports {
+            xml.isEnabled = true
+            csv.isEnabled = false
+            html.isEnabled = true
+        }
     }
 }