diff --git a/CHANGELOG.md b/CHANGELOG.md
index 5bf699c..b21a377 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,8 @@
+## `v2016_07_21_1`
+
+* new preinstalled packages: `build-tools-24.0.1` & `sys-img-armeabi-v7a-android-24`
+
+
 ## `2016_06_18_1`
 
 * `android-24` is no longer preview - package names were changed
diff --git a/Dockerfile b/Dockerfile
index f80067d..769116d 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -114,5 +114,5 @@ RUN fastlane --version
 # Cleaning
 RUN apt-get clean
 
-ENV BITRISE_DOCKER_REV_NUMBER_ANDROID 2016_06_18_1
+ENV BITRISE_DOCKER_REV_NUMBER_ANDROID v2016_07_21_1
 CMD bitrise -version