diff --git a/.bumpversion.cfg b/.bumpversion.cfg
index e9807195cf7..78cce64c37e 100644
--- a/.bumpversion.cfg
+++ b/.bumpversion.cfg
@@ -1,5 +1,5 @@
 [bumpversion]
-current_version = 0.12.8.dev0
+current_version = 0.12.9.dev0
 commit = true
 tag = true
 tag_name = {new_version}
diff --git a/.circleci/config.yml b/.circleci/config.yml
index 5ee8de53102..6c9b9bb3dba 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -22,7 +22,7 @@ executors:
 parameters:
   det-version:
     type: string
-    default: 0.12.8.dev0
+    default: 0.12.9.dev0
 
 release-and-rc-filters: &release-and-rc-filters
   branches:
diff --git a/VERSION b/VERSION
index c825594cad0..444e431aa2d 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-0.12.8.dev0
\ No newline at end of file
+0.12.9.dev0
\ No newline at end of file
diff --git a/cli/determined_cli/__version__.py b/cli/determined_cli/__version__.py
index 1fe3e8e6af2..5d6775f729b 100644
--- a/cli/determined_cli/__version__.py
+++ b/cli/determined_cli/__version__.py
@@ -1 +1 @@
-__version__ = "0.12.8.dev0"
+__version__ = "0.12.9.dev0"
diff --git a/cli/setup.py b/cli/setup.py
index 797ffeaedd1..a65ee6ab8f7 100644
--- a/cli/setup.py
+++ b/cli/setup.py
@@ -2,7 +2,7 @@
 
 setup(
     name="determined-cli",
-    version="0.12.8.dev0",
+    version="0.12.9.dev0",
     author="Determined AI",
     author_email="hello@determined.ai",
     url="https://determined.ai/",
@@ -21,7 +21,7 @@
         "ruamel.yaml>=0.15.78",
         "tabulate>=0.8.3",
         "termcolor==1.1.0",
-        "determined-common==0.12.8.dev0",
+        "determined-common==0.12.9.dev0",
     ],
     entry_points={"console_scripts": ["det = determined_cli.__main__:main"]},
 )
diff --git a/common/determined_common/__version__.py b/common/determined_common/__version__.py
index 1fe3e8e6af2..5d6775f729b 100644
--- a/common/determined_common/__version__.py
+++ b/common/determined_common/__version__.py
@@ -1 +1 @@
-__version__ = "0.12.8.dev0"
+__version__ = "0.12.9.dev0"
diff --git a/common/setup.py b/common/setup.py
index 5a81be7f536..b9f16b3e306 100644
--- a/common/setup.py
+++ b/common/setup.py
@@ -2,7 +2,7 @@
 
 setup(
     name="determined-common",
-    version="0.12.8.dev0",
+    version="0.12.9.dev0",
     author="Determined AI",
     author_email="hello@determined.ai",
     url="https://determined.ai/",
diff --git a/deploy/determined_deploy/__version__.py b/deploy/determined_deploy/__version__.py
index 1fe3e8e6af2..5d6775f729b 100644
--- a/deploy/determined_deploy/__version__.py
+++ b/deploy/determined_deploy/__version__.py
@@ -1 +1 @@
-__version__ = "0.12.8.dev0"
+__version__ = "0.12.9.dev0"
diff --git a/deploy/determined_deploy/aws/templates/secure.yaml b/deploy/determined_deploy/aws/templates/secure.yaml
index 582690be6b8..18edefd0a62 100644
--- a/deploy/determined_deploy/aws/templates/secure.yaml
+++ b/deploy/determined_deploy/aws/templates/secure.yaml
@@ -59,7 +59,7 @@ Parameters:
   Version:
     Type: String
     Description: Determined version or commit for master image
-    Default: 0.12.8.dev0
+    Default: 0.12.9.dev0
 
   DBPassword:
     Type: String
diff --git a/deploy/determined_deploy/aws/templates/simple.yaml b/deploy/determined_deploy/aws/templates/simple.yaml
index 492398249f7..20b64fb8738 100644
--- a/deploy/determined_deploy/aws/templates/simple.yaml
+++ b/deploy/determined_deploy/aws/templates/simple.yaml
@@ -33,7 +33,7 @@ Parameters:
   Version:
     Type: String
     Description: Determined version or commit for master docker image
-    Default: 0.12.8.dev0
+    Default: 0.12.9.dev0
 
   DBPassword:
     Type: String
diff --git a/deploy/determined_deploy/aws/templates/vpc.yaml b/deploy/determined_deploy/aws/templates/vpc.yaml
index a49b7b88231..63bc4edb309 100644
--- a/deploy/determined_deploy/aws/templates/vpc.yaml
+++ b/deploy/determined_deploy/aws/templates/vpc.yaml
@@ -47,7 +47,7 @@ Parameters:
   Version:
     Type: String
     Description: Determined version or commit for master image
-    Default: 0.12.8.dev0
+    Default: 0.12.9.dev0
 
   DBPassword:
     Type: String
diff --git a/deploy/setup.py b/deploy/setup.py
index d2203dd37ae..af13a09fd3b 100644
--- a/deploy/setup.py
+++ b/deploy/setup.py
@@ -2,7 +2,7 @@
 
 setup(
     name="determined-deploy",
-    version="0.12.8.dev0",
+    version="0.12.9.dev0",
     author="Determined AI",
     author_email="hello@determined.ai",
     url="https://determined.ai/",
@@ -18,7 +18,7 @@
         "docker[ssh]>=3.7.3",
         "paramiko>=2.4.2",  # explicitly pull in paramiko to prevent DistributionNotFound error
         "docker-compose>=1.13.0",
-        "determined-common==0.12.8.dev0",
+        "determined-common==0.12.9.dev0",
     ],
     entry_points={"console_scripts": ["det-deploy = determined_deploy.__main__:main"]},
 )
diff --git a/harness/determined/__version__.py b/harness/determined/__version__.py
index 1fe3e8e6af2..5d6775f729b 100644
--- a/harness/determined/__version__.py
+++ b/harness/determined/__version__.py
@@ -1 +1 @@
-__version__ = "0.12.8.dev0"
+__version__ = "0.12.9.dev0"
diff --git a/harness/setup.py b/harness/setup.py
index ebadee7ebe3..11900cdb871 100644
--- a/harness/setup.py
+++ b/harness/setup.py
@@ -2,7 +2,7 @@
 
 setup(
     name="determined",
-    version="0.12.8.dev0",
+    version="0.12.9.dev0",
     author="Determined AI",
     author_email="hello@determined.ai",
     url="https://determined.ai/",
@@ -26,7 +26,7 @@
         "pyzmq==18.1.0",
         "requests>=2.20.0",
         "simplejson==3.16.0",
-        "determined-common==0.12.8.dev0",
+        "determined-common==0.12.9.dev0",
         "yogadl==0.1.1",
     ],
     extras_require={
diff --git a/helm/charts/determined/Chart.yaml b/helm/charts/determined/Chart.yaml
index 02c74347c6d..082c9eee9c9 100644
--- a/helm/charts/determined/Chart.yaml
+++ b/helm/charts/determined/Chart.yaml
@@ -9,4 +9,4 @@ home: https://github.com/determined-ai/determined.git
 # a non-release version (e.g., X.Y.Z.dev0) you will have to specify an
 # existing official release version (e.g., X.Y.Z) or specify a commit has
 # that has been publicly published (all commits from master).
-appVersion: 0.12.8.dev0
+appVersion: 0.12.9.dev0
diff --git a/webui/elm/public/index.html b/webui/elm/public/index.html
index 88bdd70f097..4cbc4f529e6 100644
--- a/webui/elm/public/index.html
+++ b/webui/elm/public/index.html
@@ -32,7 +32,7 @@
       }
     }();
 
-    let app = Elm.Main.init({ flags: '0.12.8.dev0' });
+    let app = Elm.Main.init({ flags: '0.12.9.dev0' });
     DetShims.addPorts(app);
   </script>
 </body>
diff --git a/webui/react/config-overrides.js b/webui/react/config-overrides.js
index 875ef607a56..5f9fa22d062 100644
--- a/webui/react/config-overrides.js
+++ b/webui/react/config-overrides.js
@@ -49,7 +49,7 @@ module.exports = override(
   // Webapp version is hardcoded but handled by `bumpversion`
   addWebpackPlugin(
     new webpack.DefinePlugin({
-      'process.env.VERSION': '"0.12.8.dev0"',
+      'process.env.VERSION': '"0.12.9.dev0"',
       'process.env.IS_DEV': JSON.stringify(process.env.NODE_ENV === 'development'),
     })
   )