diff --git a/gym-unity/setup.py b/gym-unity/setup.py
index 64cb242bd6..dc8e25fde3 100755
--- a/gym-unity/setup.py
+++ b/gym-unity/setup.py
@@ -4,12 +4,12 @@
 
 setup(
     name="gym_unity",
-    version="0.4.4",
+    version="0.4.5.dev0",
     description="Unity Machine Learning Agents Gym Interface",
     license="Apache License 2.0",
     author="Unity Technologies",
     author_email="ML-Agents@unity3d.com",
     url="https://github.com/Unity-Technologies/ml-agents",
     packages=find_packages(),
-    install_requires=["gym", "mlagents_envs==0.9.1"],
+    install_requires=["gym", "mlagents_envs==0.10.0.dev0"],
 )
diff --git a/ml-agents-envs/setup.py b/ml-agents-envs/setup.py
index 06d8131546..07710a68ef 100644
--- a/ml-agents-envs/setup.py
+++ b/ml-agents-envs/setup.py
@@ -5,7 +5,7 @@
 
 setup(
     name="mlagents_envs",
-    version="0.9.1",
+    version="0.10.0.dev0",
     description="Unity Machine Learning Agents Interface",
     url="https://github.com/Unity-Technologies/ml-agents",
     author="Unity Technologies",
diff --git a/ml-agents/setup.py b/ml-agents/setup.py
index 0df6cf33d5..0838f907a6 100644
--- a/ml-agents/setup.py
+++ b/ml-agents/setup.py
@@ -10,7 +10,7 @@
 
 setup(
     name="mlagents",
-    version="0.9.1",
+    version="0.10.0.dev0",
     description="Unity Machine Learning Agents",
     long_description=long_description,
     long_description_content_type="text/markdown",
@@ -29,7 +29,7 @@
     ),
     zip_safe=False,
     install_requires=[
-        "mlagents_envs==0.9.1",
+        "mlagents_envs==0.10.0.dev0",
         "tensorflow>=1.7,<1.8",
         "Pillow>=4.2.1",
         "matplotlib",