diff --git a/.gitignore b/.gitignore
index 1bf64dd..f911a15 100644
--- a/.gitignore
+++ b/.gitignore
@@ -3,4 +3,5 @@
 /local.properties
 build/
 .DS_Store
-/out
\ No newline at end of file
+/out
+*.iml
\ No newline at end of file
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 40a4aba..59fef00 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,10 @@
 # CHANGELOG
 
+## Version 0.9.0 (2017-12-26)
+
+- [kotlinx.coroutines 0.20](https://github.com/Kotlin/kotlinx.coroutines/releases/tag/0.20)
+- Compiled against Kotlin 1.2.10
+
 ## Version 0.8.2 (2017-10-04)
 
 - Fixed Kotlin stdlib dependency version in pom.xml
diff --git a/README.md b/README.md
index 14208fb..a21fa82 100644
--- a/README.md
+++ b/README.md
@@ -14,7 +14,7 @@ Download the [JAR](https://bintray.com/gildor/maven/kotlin-coroutines-retrofit#f
 Gradle:
 
 ```groovy
-compile 'ru.gildor.coroutines:kotlin-coroutines-retrofit:0.8.2'
+compile 'ru.gildor.coroutines:kotlin-coroutines-retrofit:0.9.0'
 ```
 
 Maven:
@@ -23,7 +23,7 @@ Maven:
 <dependency>
   <groupId>ru.gildor.coroutines</groupId>
   <artifactId>kotlin-coroutines-retrofit</artifactId>
-  <version>0.8.2</version>
+  <version>0.9.0</version>
 </dependency>
 ```
 
diff --git a/build.gradle b/build.gradle
index 69d80b6..0afd3b7 100644
--- a/build.gradle
+++ b/build.gradle
@@ -1,11 +1,11 @@
 plugins {
-    id "org.jetbrains.kotlin.jvm" version "1.1.51"
+    id "org.jetbrains.kotlin.jvm" version "1.2.10"
     id "com.jfrog.bintray" version "1.7.3" apply false
     id "jacoco"
 }
 
 group 'ru.gildor.coroutines'
-version '0.8.2'
+version '0.9.0'
 
 repositories {
     jcenter()
@@ -16,7 +16,7 @@ sourceCompatibility = '1.6'
 
 dependencies {
     compile "org.jetbrains.kotlin:kotlin-stdlib:${plugins.findPlugin("kotlin").properties["kotlinPluginVersion"]}"
-    compile "org.jetbrains.kotlinx:kotlinx-coroutines-core:0.19"
+    compile "org.jetbrains.kotlinx:kotlinx-coroutines-core:0.20"
     compile 'com.squareup.retrofit2:retrofit:2.3.0'
     testCompile 'junit:junit:4.12'
 }