diff --git a/.travis.yml b/.travis.yml
index e972af3..cbc3522 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -10,7 +10,7 @@ env:
   - FLOW_VERSION=4.0.*
 
 before_script:
-  - git clone --depth=50 --branch=master git://github.com/aimeos/aimeos-core.git ../aimeos-core
+  - git clone --depth=50 --branch=2017.07 git://github.com/aimeos/aimeos-core.git ../aimeos-core
   - cd ../aimeos-core
   - mv ../ai-flow ext/
   - travis_retry composer require "neos/flow:${FLOW_VERSION}" "zendframework/zend-diactoros:~1.0"
diff --git a/composer.json b/composer.json
index 86e1aad..f3cd2b3 100644
--- a/composer.json
+++ b/composer.json
@@ -19,7 +19,7 @@
 		"neos/cache": "~4.0",
 		"composer/installers": "^1.0",
 		"zendframework/zend-diactoros": "~1.0",
-		"aimeos/aimeos-core": "dev-master"
+		"aimeos/aimeos-core": "~2017.07"
 	},
 	"autoload": {
 		"psr-4": {