diff --git a/eng/jacoco-test-coverage/pom.xml b/eng/jacoco-test-coverage/pom.xml
index b2c8e843b4403..88a63b14c44a7 100644
--- a/eng/jacoco-test-coverage/pom.xml
+++ b/eng/jacoco-test-coverage/pom.xml
@@ -109,7 +109,7 @@
     <dependency>
       <groupId>com.azure</groupId>
       <artifactId>azure-cosmos</artifactId>
-      <version>4.2.0</version> <!-- {x-version-update;com.azure:azure-cosmos;current} -->
+      <version>4.3.0-beta.1</version> <!-- {x-version-update;com.azure:azure-cosmos;current} -->
     </dependency>
     <dependency>
       <groupId>com.azure</groupId>
diff --git a/eng/versioning/version_client.txt b/eng/versioning/version_client.txt
index 322a6bc727b31..f01fead1e5042 100644
--- a/eng/versioning/version_client.txt
+++ b/eng/versioning/version_client.txt
@@ -19,7 +19,7 @@ com.azure:azure-core-serializer-json-gson;1.0.0-beta.1;1.0.0-beta.2
 com.azure:azure-core-serializer-json-jackson;1.0.0-beta.1;1.0.0-beta.2
 com.azure:azure-core-test;1.3.1;1.4.0-beta.1
 com.azure:azure-core-tracing-opentelemetry;1.0.0-beta.5;1.0.0-beta.6
-com.azure:azure-cosmos;4.1.0;4.2.0
+com.azure:azure-cosmos;4.2.0;4.3.0-beta.1
 com.azure:azure-cosmos-benchmark;4.0.1-beta.1;4.0.1-beta.1
 com.azure:azure-data-appconfiguration;1.1.3;1.2.0-beta.1
 com.azure:azure-data-schemaregistry;1.0.0-beta.2;1.0.0-beta.3
diff --git a/sdk/cosmos/azure-cosmos-benchmark/pom.xml b/sdk/cosmos/azure-cosmos-benchmark/pom.xml
index 607609ca2fcce..38363860f0ac0 100644
--- a/sdk/cosmos/azure-cosmos-benchmark/pom.xml
+++ b/sdk/cosmos/azure-cosmos-benchmark/pom.xml
@@ -43,7 +43,7 @@ Licensed under the MIT License.
     <dependency>
       <groupId>com.azure</groupId>
       <artifactId>azure-cosmos</artifactId>
-      <version>4.2.0</version> <!-- {x-version-update;com.azure:azure-cosmos;current} -->
+      <version>4.3.0-beta.1</version> <!-- {x-version-update;com.azure:azure-cosmos;current} -->
     </dependency>
 
     <dependency>
diff --git a/sdk/cosmos/azure-cosmos/CHANGELOG.md b/sdk/cosmos/azure-cosmos/CHANGELOG.md
index 10d2aac1d1337..a3ae24c7918cc 100644
--- a/sdk/cosmos/azure-cosmos/CHANGELOG.md
+++ b/sdk/cosmos/azure-cosmos/CHANGELOG.md
@@ -1,5 +1,8 @@
 # Release History
 
+## 4.3.0-beta.1 (Unreleased)
+
+
 ## 4.2.0 (2020-07-14)
 ### New Features
 * Added script logging enabled API to `CosmosStoredProcedureRequestOptions`.
diff --git a/sdk/cosmos/azure-cosmos/pom.xml b/sdk/cosmos/azure-cosmos/pom.xml
index d3d34b1769892..303fa14f63308 100644
--- a/sdk/cosmos/azure-cosmos/pom.xml
+++ b/sdk/cosmos/azure-cosmos/pom.xml
@@ -13,7 +13,7 @@ Licensed under the MIT License.
 
   <groupId>com.azure</groupId>
   <artifactId>azure-cosmos</artifactId>
-  <version>4.2.0</version> <!-- {x-version-update;com.azure:azure-cosmos;current} -->
+  <version>4.3.0-beta.1</version> <!-- {x-version-update;com.azure:azure-cosmos;current} -->
   <name>Microsoft Azure SDK for SQL API of Azure Cosmos DB Service</name>
   <description>This Package contains Microsoft Azure Cosmos SDK (with Reactive Extension Reactor support) for Azure Cosmos DB SQL API</description>
   <packaging>jar</packaging>