diff --git a/R/rdeephaven/DESCRIPTION b/R/rdeephaven/DESCRIPTION
index 79126c5f9c1..5a8d5be700a 100644
--- a/R/rdeephaven/DESCRIPTION
+++ b/R/rdeephaven/DESCRIPTION
@@ -1,7 +1,7 @@
 Package: rdeephaven
 Type: Package
 Title: R Client for Deephaven Core
-Version: 0.29.0
+Version: 0.28.1
 Date: 2023-05-12
 Author: Deephaven Data Labs
 Maintainer: Alex Peters <alexpeters@deephaven.io>
diff --git a/authorization-codegen/protoc-gen-contextual-auth-wiring b/authorization-codegen/protoc-gen-contextual-auth-wiring
index 5b4cd3202ee..1d65d7a2303 100755
--- a/authorization-codegen/protoc-gen-contextual-auth-wiring
+++ b/authorization-codegen/protoc-gen-contextual-auth-wiring
@@ -1,2 +1,2 @@
 # protoc-gen-contextual-auth-wiring
-java -cp authorization-codegen/build/libs/deephaven-authorization-codegen-0.29.0-all.jar io.deephaven.auth.codegen.GenerateContextualAuthWiring
+java -cp authorization-codegen/build/libs/deephaven-authorization-codegen-0.28.1-all.jar io.deephaven.auth.codegen.GenerateContextualAuthWiring
diff --git a/authorization-codegen/protoc-gen-service-auth-wiring b/authorization-codegen/protoc-gen-service-auth-wiring
index 4a84af05baf..7c7fb0d1d60 100755
--- a/authorization-codegen/protoc-gen-service-auth-wiring
+++ b/authorization-codegen/protoc-gen-service-auth-wiring
@@ -1,2 +1,2 @@
 # protoc-gen-service-auth-wiring
-java -cp authorization-codegen/build/libs/deephaven-authorization-codegen-0.29.0-all.jar io.deephaven.auth.codegen.GenerateServiceAuthWiring
+java -cp authorization-codegen/build/libs/deephaven-authorization-codegen-0.28.1-all.jar io.deephaven.auth.codegen.GenerateServiceAuthWiring
diff --git a/buildSrc/src/main/groovy/io.deephaven.common-conventions.gradle b/buildSrc/src/main/groovy/io.deephaven.common-conventions.gradle
index 0b8d5c1c891..fff528a1782 100644
--- a/buildSrc/src/main/groovy/io.deephaven.common-conventions.gradle
+++ b/buildSrc/src/main/groovy/io.deephaven.common-conventions.gradle
@@ -5,7 +5,7 @@ plugins {
 }
 
 group = 'io.deephaven'
-version = '0.29.0'
+version = '0.28.1'
 
 if (!name.startsWith('deephaven-')) {
     archivesBaseName = "deephaven-${name}"
diff --git a/py/client-ticking/README.md b/py/client-ticking/README.md
index 8c0aa4b5a1a..1d291c1b28c 100644
--- a/py/client-ticking/README.md
+++ b/py/client-ticking/README.md
@@ -66,7 +66,7 @@ Then install the package.
 Note the actual name of the `.whl` file may be different depending on system details.
 
 ```
-pip3 install --force --no-deps dist/pydeephaven_ticking-0.29.0-cp310-cp310-linux_x86_64.whl
+pip3 install --force --no-deps dist/pydeephaven_ticking-0.28.1-cp310-cp310-linux_x86_64.whl
 ```
 
 The reason for the "--force" flag is to overwrite any previously-built version of the package that
diff --git a/py/client-ticking/setup.py b/py/client-ticking/setup.py
index b5fc690a040..47e25e36836 100644
--- a/py/client-ticking/setup.py
+++ b/py/client-ticking/setup.py
@@ -13,7 +13,7 @@
 
 setup(
     name='pydeephaven-ticking',
-    version='0.29.0.dev',
+    version='0.28.1.dev',
     description='The Deephaven Python Client for Ticking Tables',
     long_description=README,
     long_description_content_type="text/markdown",
@@ -44,5 +44,5 @@
                    libraries=["dhcore"]
         )]),
     python_requires='>=3.8',
-    install_requires=['pydeephaven==0.29.0']
+    install_requires=['pydeephaven==0.28.1']
 )
diff --git a/py/client/README.md b/py/client/README.md
index 70bb04bb3e3..de9aaadd053 100644
--- a/py/client/README.md
+++ b/py/client/README.md
@@ -38,7 +38,7 @@ $ python3 -m examples.demo_asof_join
 Note the actual name of the `.whl` file may be different depending on system details.
 
 ``` shell
-$ pip3 install dist/pydeephaven-0.29.0-py3-none-any.whl
+$ pip3 install dist/pydeephaven-0.28.1-py3-none-any.whl
 ```
 ## Quick start
 
diff --git a/py/client/pydeephaven/__init__.py b/py/client/pydeephaven/__init__.py
index e04095714ba..7d5daf890bf 100644
--- a/py/client/pydeephaven/__init__.py
+++ b/py/client/pydeephaven/__init__.py
@@ -35,4 +35,4 @@
     pass
 
 __all__ = ["Session", "DHError", "SortDirection"]
-__version__ = "0.29.0"
+__version__ = "0.28.1"
diff --git a/py/client/setup.py b/py/client/setup.py
index be8954864fb..64761c126e5 100644
--- a/py/client/setup.py
+++ b/py/client/setup.py
@@ -12,7 +12,7 @@
 
 setup(
     name='pydeephaven',
-    version='0.29.0',
+    version='0.28.1',
     description='The Deephaven Python Client',
     long_description=README,
     long_description_content_type="text/markdown",
diff --git a/py/embedded-server/deephaven_server/__init__.py b/py/embedded-server/deephaven_server/__init__.py
index 66e5f0d8ec5..7aff9d2f4ef 100644
--- a/py/embedded-server/deephaven_server/__init__.py
+++ b/py/embedded-server/deephaven_server/__init__.py
@@ -1,7 +1,7 @@
 #
 # Copyright (c) 2016-2022 Deephaven Data Labs and Patent Pending
 #
-__version__ = "0.29.0"
+__version__ = "0.28.1"
 
 from .start_jvm import DEFAULT_JVM_PROPERTIES, DEFAULT_JVM_ARGS, start_jvm
 from .server import Server
diff --git a/py/server/deephaven/__init__.py b/py/server/deephaven/__init__.py
index d299242a7a3..756f7ee829f 100644
--- a/py/server/deephaven/__init__.py
+++ b/py/server/deephaven/__init__.py
@@ -7,7 +7,7 @@
 
 """
 
-__version__ = "0.29.0"
+__version__ = "0.28.1"
 
 from deephaven_internal import jvm