diff --git a/Makefile b/Makefile
index 892a527..e72e2e2 100644
--- a/Makefile
+++ b/Makefile
@@ -60,7 +60,7 @@
 venv-service:
 	virtualenv $@;\
     source ./$@/bin/activate ; set -u ;\
-    pip install -r requirements.txt xosmigrate~=3.2.6 django
+    pip install -r requirements.txt xosmigrate~=4.0.0 django
 
 create-migration: venv-service
 	source ./venv-service/bin/activate; set -u;\
diff --git a/VERSION b/VERSION
index 40b6307..fb0ed55 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-1.4.0-dev
\ No newline at end of file
+2.0.0-dev
\ No newline at end of file
diff --git a/requirements.txt b/requirements.txt
index 669c29b..0a02ecd 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,3 +1,3 @@
-xossynchronizer~=3.2.1
-xosapi~=3.2.1
-xoskafka~=3.2.1
+xossynchronizer~=4.0.0
+xosapi~=4.0.0
+xoskafka~=4.0.0
diff --git a/xos/synchronizer/config.yaml b/xos/synchronizer/config.yaml
index 0f7699e..939770d 100644
--- a/xos/synchronizer/config.yaml
+++ b/xos/synchronizer/config.yaml
@@ -15,7 +15,7 @@
 
 
 name: rcord
-core_version: ">=3.2.8"
+core_version: ">=4.0.0"
 required_models:
   - RCORDService
   - RCORDSubscriber