diff --git a/CHANGELOG.md b/CHANGELOG.md
index fbeaf2f..0cdbcef 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,12 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](http://keepachangelog.com/)
 and this project adheres to [Semantic Versioning](http://semver.org/).
 
+## [1.1.0] - 2020-04-21
+
+### Added
+
+- `(Map<String, String>) env.allVariables` to get all environment variables includes variables specified in `.env` files. [#5](https://github.com/uzzu/dotenv-gradle/pull/5)
+
 ## [1.0.2] - 2020-02-12
 
 ### Fixed
diff --git a/README.md b/README.md
index c6ad27b..97e6aa2 100644
--- a/README.md
+++ b/README.md
@@ -15,7 +15,6 @@ Don't need to apply this plugin to subprojects.
 
 ### Create `.env` in the root directory of your gradle project
 
-
 For example:
 
 ```dosini
@@ -42,7 +41,15 @@ println(env.BAZ.orElse("default baz"))  // => baz
 
 If a `.env.template` file exists, this plugin refer it to create a environemnt variable properties in the `env` extension.
 
-[See more examples](/examples/basic)
+### Others
+- All APIs of `env` extension consider `.env` file.
+  - If the same variable name value is defined in both the `.env` file and the system environment variable, the system environment variable takes precedence.
+- `(Boolean) env.isPresent(name: String)` : Indicates an environment variable with specified name is present.
+- `(String) env.fetch(name: String)` : Returns an environment variable.
+- `(String) env.fetch(name: String, defaultValue: String)` : Returns an environment variable, or specified default value if environment variable was not set.
+- `(String?) env.fetchOrNull(name: String)` : Returns an environment variable, or null if environment variable was not set.
+- `(Map<String, String) env.allVariables` : Returns all environment variables.
+- [See more examples](/examples/basic)
 
 ## License
 
diff --git a/examples/basic/build.gradle.kts b/examples/basic/build.gradle.kts
index d131d1f..0b05215 100644
--- a/examples/basic/build.gradle.kts
+++ b/examples/basic/build.gradle.kts
@@ -1,6 +1,6 @@
 plugins {
     base
-    id("co.uzzu.dotenv.gradle") version "1.0.2"
+    id("co.uzzu.dotenv.gradle") version "1.1.0"
 }
 
 println(env.FOO.orElse("default_foo"))
diff --git a/plugin/build.gradle.kts b/plugin/build.gradle.kts
index 81d3380..59436b1 100644
--- a/plugin/build.gradle.kts
+++ b/plugin/build.gradle.kts
@@ -41,7 +41,7 @@ tasks {
 object Artifact {
     val groupId = "co.uzzu.dotenv"
     val artifactId = "gradle"
-    val version = "1.0.2"
+    val version = "1.1.0"
 }
 
 group = Artifact.groupId