diff --git a/DevProject/Packages/packages-lock.json b/DevProject/Packages/packages-lock.json
index 427316493c..dab9dbe948 100644
--- a/DevProject/Packages/packages-lock.json
+++ b/DevProject/Packages/packages-lock.json
@@ -65,7 +65,7 @@
       "depth": 0,
       "source": "local",
       "dependencies": {
-        "com.unity.ml-agents": "2.0.0-exp.1",
+        "com.unity.ml-agents": "2.1.0-exp.1",
         "com.unity.modules.physics": "1.0.0"
       }
     },
diff --git a/Project/Packages/packages-lock.json b/Project/Packages/packages-lock.json
index ee3cc431a7..7576145879 100644
--- a/Project/Packages/packages-lock.json
+++ b/Project/Packages/packages-lock.json
@@ -63,7 +63,7 @@
       "depth": 0,
       "source": "local",
       "dependencies": {
-        "com.unity.ml-agents": "2.0.0-exp.1",
+        "com.unity.ml-agents": "2.1.0-exp.1",
         "com.unity.modules.physics": "1.0.0"
       }
     },
diff --git a/com.unity.ml-agents.extensions/package.json b/com.unity.ml-agents.extensions/package.json
index ee6f5c368b..c000b330fd 100644
--- a/com.unity.ml-agents.extensions/package.json
+++ b/com.unity.ml-agents.extensions/package.json
@@ -1,11 +1,11 @@
 {
   "name": "com.unity.ml-agents.extensions",
   "displayName": "ML Agents Extensions",
-  "version": "0.4.0-preview",
+  "version": "0.5.0-preview",
   "unity": "2019.4",
   "description": "A source-only package for new features based on ML-Agents",
   "dependencies": {
-    "com.unity.ml-agents": "2.0.0-exp.1",
+    "com.unity.ml-agents": "2.1.0-exp.1",
     "com.unity.modules.physics": "1.0.0"
   }
 }
diff --git a/com.unity.ml-agents/Runtime/Academy.cs b/com.unity.ml-agents/Runtime/Academy.cs
index b436041c89..2e44cd0e4e 100644
--- a/com.unity.ml-agents/Runtime/Academy.cs
+++ b/com.unity.ml-agents/Runtime/Academy.cs
@@ -107,7 +107,7 @@ public class Academy : IDisposable
         /// Unity package version of com.unity.ml-agents.
         /// This must match the version string in package.json and is checked in a unit test.
         /// </summary>
-        internal const string k_PackageVersion = "2.0.0-exp.1";
+        internal const string k_PackageVersion = "2.1.0-exp.1";
 
         const int k_EditorTrainingPort = 5004;
 
diff --git a/com.unity.ml-agents/package.json b/com.unity.ml-agents/package.json
index 4a0a50ea69..d97716dbe7 100755
--- a/com.unity.ml-agents/package.json
+++ b/com.unity.ml-agents/package.json
@@ -1,7 +1,7 @@
 {
   "name": "com.unity.ml-agents",
   "displayName": "ML Agents",
-  "version": "2.0.0-exp.1",
+  "version": "2.1.0-exp.1",
   "unity": "2019.4",
   "description": "Use state-of-the-art machine learning to create intelligent character behaviors in any Unity environment (games, robotics, film, etc.).",
   "dependencies": {
diff --git a/gym-unity/gym_unity/__init__.py b/gym-unity/gym_unity/__init__.py
index 971eeccdd5..7902085efe 100644
--- a/gym-unity/gym_unity/__init__.py
+++ b/gym-unity/gym_unity/__init__.py
@@ -1,5 +1,5 @@
 # Version of the library that will be used to upload to pypi
-__version__ = "0.27.0.dev0"
+__version__ = "0.28.0.dev0"
 
 # Git tag that will be checked to determine whether to trigger upload to pypi
 __release_tag__ = None
diff --git a/ml-agents-envs/mlagents_envs/__init__.py b/ml-agents-envs/mlagents_envs/__init__.py
index 971eeccdd5..7902085efe 100644
--- a/ml-agents-envs/mlagents_envs/__init__.py
+++ b/ml-agents-envs/mlagents_envs/__init__.py
@@ -1,5 +1,5 @@
 # Version of the library that will be used to upload to pypi
-__version__ = "0.27.0.dev0"
+__version__ = "0.28.0.dev0"
 
 # Git tag that will be checked to determine whether to trigger upload to pypi
 __release_tag__ = None
diff --git a/ml-agents/mlagents/trainers/__init__.py b/ml-agents/mlagents/trainers/__init__.py
index 971eeccdd5..7902085efe 100644
--- a/ml-agents/mlagents/trainers/__init__.py
+++ b/ml-agents/mlagents/trainers/__init__.py
@@ -1,5 +1,5 @@
 # Version of the library that will be used to upload to pypi
-__version__ = "0.27.0.dev0"
+__version__ = "0.28.0.dev0"
 
 # Git tag that will be checked to determine whether to trigger upload to pypi
 __release_tag__ = None