diff --git a/.github/workflows/build-checker.yml b/.github/workflows/build-checker.yml
index 671e4476d2..8b1ad5c259 100644
--- a/.github/workflows/build-checker.yml
+++ b/.github/workflows/build-checker.yml
@@ -4,11 +4,12 @@ on:
   pull_request:
       branches:
       - master
+      - v0.*
 
 jobs:
   build:
     name: Build Checker
-    runs-on: ubuntu-18.04
+    runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2.3.4
         with:
diff --git a/.github/workflows/build-gradle-examples.yml b/.github/workflows/build-gradle-examples.yml
index d63375c451..d84bc47980 100644
--- a/.github/workflows/build-gradle-examples.yml
+++ b/.github/workflows/build-gradle-examples.yml
@@ -4,11 +4,12 @@ on:
   pull_request:
       branches:
       - master
+      - v0.*
 
 jobs:
   build:
     name: Build Gradle Examples Ubuntu
-    runs-on: ubuntu-18.04
+    runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2.3.4
         with:
diff --git a/.github/workflows/build-maven-examples.yml b/.github/workflows/build-maven-examples.yml
index ad0591438f..33dc65fab3 100644
--- a/.github/workflows/build-maven-examples.yml
+++ b/.github/workflows/build-maven-examples.yml
@@ -4,11 +4,12 @@ on:
   pull_request:
       branches:
       - master
+      - v0.*
 
 jobs:
   build:
     name: Build Maven Examples Ubuntu
-    runs-on: ubuntu-18.04
+    runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2.3.4
         with:
diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 9f50e8c58d..da2af1167d 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -4,6 +4,7 @@ on:
   pull_request:
       branches:
       - master
+      - v0.*
 
 jobs:
   build:
@@ -13,12 +14,12 @@ jobs:
       matrix:
         os:
           - macos-latest
-          - ubuntu-18.04
+          - ubuntu-latest
         java:
           - 8
           # TODO: Java 11 build doesn't work due to Java7 target.
         include:
-          - os: ubuntu-18.04
+          - os: ubuntu-latest
             java: 8
             coverage: true
     steps:
diff --git a/README.md b/README.md
index a133ff3b15..e9276e536d 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,11 @@
+> **Warning**
+>
+> OpenCensus and OpenTracing have merged to form [OpenTelemetry](https://opentelemetry.io), which serves as the next major version of OpenCensus and OpenTracing.
+>
+> OpenTelemetry has now reached feature parity with OpenCensus, with tracing and metrics SDKs available in .NET, Golang, Java, NodeJS, and Python. **All OpenCensus Github repositories, except [census-instrumentation/opencensus-python](https://github.com/census-instrumentation/opencensus-python), will be archived on July 31st, 2023**. We encourage users to migrate to OpenTelemetry by this date.
+>
+> To help you gradually migrate your instrumentation to OpenTelemetry, bridges are available in Java, Go, Python, and JS. [**Read the full blog post to learn more**](https://opentelemetry.io/blog/2023/sunsetting-opencensus/).
+
 # OpenCensus - A stats collection and distributed tracing framework
 [![Gitter chat][gitter-image]][gitter-url]
 [![Maven Central][maven-image]][maven-url]
diff --git a/api/src/main/java/io/opencensus/common/OpenCensusLibraryInformation.java b/api/src/main/java/io/opencensus/common/OpenCensusLibraryInformation.java
index ce285b1930..599c3d46f2 100644
--- a/api/src/main/java/io/opencensus/common/OpenCensusLibraryInformation.java
+++ b/api/src/main/java/io/opencensus/common/OpenCensusLibraryInformation.java
@@ -29,7 +29,7 @@ public final class OpenCensusLibraryInformation {
    *
    * @since 0.8
    */
-  public static final String VERSION = "0.29.0-SNAPSHOT"; // CURRENT_OPENCENSUS_VERSION
+  public static final String VERSION = "0.32.0-SNAPSHOT"; // CURRENT_OPENCENSUS_VERSION
 
   private OpenCensusLibraryInformation() {}
 }
diff --git a/build.gradle b/build.gradle
index 722ebb5a7e..2e79333f06 100644
--- a/build.gradle
+++ b/build.gradle
@@ -51,7 +51,7 @@ subprojects {
     }
 
     group = "io.opencensus"
-    version = "0.31.0-SNAPSHOT" // CURRENT_OPENCENSUS_VERSION
+    version = "0.32.0-SNAPSHOT" // CURRENT_OPENCENSUS_VERSION
 
     sourceCompatibility = 1.7
     targetCompatibility = 1.7
diff --git a/contrib/grpc_metrics/src/main/java/io/opencensus/contrib/grpc/metrics/RpcMeasureConstants.java b/contrib/grpc_metrics/src/main/java/io/opencensus/contrib/grpc/metrics/RpcMeasureConstants.java
index 215e4de795..54047d34fc 100644
--- a/contrib/grpc_metrics/src/main/java/io/opencensus/contrib/grpc/metrics/RpcMeasureConstants.java
+++ b/contrib/grpc_metrics/src/main/java/io/opencensus/contrib/grpc/metrics/RpcMeasureConstants.java
@@ -235,7 +235,7 @@ public final class RpcMeasureConstants {
    */
   public static final MeasureLong GRPC_CLIENT_RETRIES_PER_CALL =
       Measure.MeasureLong.create(
-          "grpc.io/client/retries_per_call", "Number of retries per call.", COUNT);
+          "grpc.io/client/retries_per_call", "Number of retries per call", COUNT);
 
   /**
    * {@link Measure} for total number of transparent retries made during the client call.
@@ -244,9 +244,7 @@ public final class RpcMeasureConstants {
    */
   public static final MeasureLong GRPC_CLIENT_TRANSPARENT_RETRIES_PER_CALL =
       Measure.MeasureLong.create(
-          "grpc.io/client/transparent_retries_per_call",
-          "Number of transparent retries per call.",
-          COUNT);
+          "grpc.io/client/transparent_retries_per_call", "Transparent retries per call", COUNT);
 
   /**
    * {@link Measure} for total time of delay while there is no active attempt during the client
@@ -254,9 +252,9 @@ public final class RpcMeasureConstants {
    *
    * @since 0.28
    */
-  public static final MeasureLong GRPC_CLIENT_RETRY_DELAY_PER_CALL =
-      Measure.MeasureLong.create(
-          "grpc.io/client/retry_delay_per_call", "Retry delay per call.", MILLISECOND);
+  public static final MeasureDouble GRPC_CLIENT_RETRY_DELAY_PER_CALL =
+      Measure.MeasureDouble.create(
+          "grpc.io/client/retry_delay_per_call", "Retry delay per call", MILLISECOND);
 
   /**
    * {@link Measure} for gRPC client error counts.
diff --git a/examples/build.gradle b/examples/build.gradle
index 6c83d90233..ac437cfc8f 100644
--- a/examples/build.gradle
+++ b/examples/build.gradle
@@ -31,7 +31,7 @@ repositories {
 }
 
 group = "io.opencensus"
-version = "0.31.0-SNAPSHOT" // CURRENT_OPENCENSUS_VERSION
+version = "0.32.0-SNAPSHOT" // CURRENT_OPENCENSUS_VERSION
 
 def opencensusVersion = "0.30.0" // LATEST_OPENCENSUS_RELEASE_VERSION
 def grpcVersion = "1.32.2" // CURRENT_GRPC_VERSION
diff --git a/examples/pom.xml b/examples/pom.xml
index 8f3dbfb165..e12e8e3bac 100644
--- a/examples/pom.xml
+++ b/examples/pom.xml
@@ -5,7 +5,7 @@
   <groupId>io.opencensus</groupId>
   <artifactId>opencensus-examples</artifactId>
   <packaging>jar</packaging>
-  <version>0.31.0-SNAPSHOT</version><!-- CURRENT_OPENCENSUS_VERSION -->
+  <version>0.32.0-SNAPSHOT</version><!-- CURRENT_OPENCENSUS_VERSION -->
   <name>opencensus-examples</name>
   <url>http://maven.apache.org</url>
   <properties>
diff --git a/examples/spring/servlet/build.gradle b/examples/spring/servlet/build.gradle
index bb07aa8e00..c993f27940 100644
--- a/examples/spring/servlet/build.gradle
+++ b/examples/spring/servlet/build.gradle
@@ -30,7 +30,7 @@ repositories {
 }
 
 group = "io.opencensus"
-version = "0.30.0-SNAPSHOT" // CURRENT_OPENCENSUS_VERSION
+version = "0.32.0-SNAPSHOT" // CURRENT_OPENCENSUS_VERSION
 
 def opencensusVersion = "0.26.0" // LATEST_OPENCENSUS_RELEASE_VERSION
 def prometheusVersion = "0.6.0"
@@ -85,7 +85,7 @@ apply plugin: 'io.spring.dependency-management'
 bootJar {
     mainClassName = 'com.baeldung.Application'
     baseName = 'opencensus-examples-spring-servlet'
-    version = "0.31.0-SNAPSHOT" // CURRENT_OPENCENSUS_VERSION
+    version = "0.32.0-SNAPSHOT" // CURRENT_OPENCENSUS_VERSION
 }
 
 sourceCompatibility = 1.8
diff --git a/examples/spring/servlet/pom.xml b/examples/spring/servlet/pom.xml
index 5e6b28d052..0c3e102845 100644
--- a/examples/spring/servlet/pom.xml
+++ b/examples/spring/servlet/pom.xml
@@ -15,7 +15,7 @@
     <apachehttp.version>4.1.4</apachehttp.version>
     <opencensus.version>0.26.0</opencensus.version><!-- LATEST_OPENCENSUS_RELEASE_VERSION -->
     <prometheus.version>0.6.0</prometheus.version>
-    <springboot.version>2.0.5.RELEASE</springboot.version>
+    <springboot.version>2.5.12</springboot.version>
     <java.version>1.8</java.version>
   </properties>
 
diff --git a/exporters/metrics/ocagent/src/main/java/io/opencensus/exporter/metrics/ocagent/OcAgentNodeUtils.java b/exporters/metrics/ocagent/src/main/java/io/opencensus/exporter/metrics/ocagent/OcAgentNodeUtils.java
index 72307d5062..ef157eb01e 100644
--- a/exporters/metrics/ocagent/src/main/java/io/opencensus/exporter/metrics/ocagent/OcAgentNodeUtils.java
+++ b/exporters/metrics/ocagent/src/main/java/io/opencensus/exporter/metrics/ocagent/OcAgentNodeUtils.java
@@ -39,7 +39,7 @@ final class OcAgentNodeUtils {
 
   // The current version of the OpenCensus OC-Agent Exporter.
   @VisibleForTesting
-  static final String OC_AGENT_EXPORTER_VERSION = "0.31.0-SNAPSHOT"; // CURRENT_OPENCENSUS_VERSION
+  static final String OC_AGENT_EXPORTER_VERSION = "0.32.0-SNAPSHOT"; // CURRENT_OPENCENSUS_VERSION
 
   @Nullable
   private static final io.opencensus.resource.Resource AUTO_DETECTED_RESOURCE =
diff --git a/exporters/stats/stackdriver/src/main/java/io/opencensus/exporter/stats/stackdriver/CreateMetricDescriptorExporter.java b/exporters/stats/stackdriver/src/main/java/io/opencensus/exporter/stats/stackdriver/CreateMetricDescriptorExporter.java
index f247a6f479..fc39591a9d 100644
--- a/exporters/stats/stackdriver/src/main/java/io/opencensus/exporter/stats/stackdriver/CreateMetricDescriptorExporter.java
+++ b/exporters/stats/stackdriver/src/main/java/io/opencensus/exporter/stats/stackdriver/CreateMetricDescriptorExporter.java
@@ -44,7 +44,8 @@ final class CreateMetricDescriptorExporter extends MetricExporter {
   private static final Logger logger =
       Logger.getLogger(CreateMetricDescriptorExporter.class.getName());
   private static final ImmutableSet<String> SUPPORTED_EXTERNAL_DOMAINS =
-      ImmutableSet.<String>of("custom.googleapis.com", "external.googleapis.com");
+      ImmutableSet.<String>of(
+          "custom.googleapis.com", "external.googleapis.com", "workload.googleapis.com");
   private static final String GOOGLE_APIS_DOMAIN_SUFFIX = "googleapis.com";
 
   private final String projectId;
@@ -166,8 +167,8 @@ private static boolean isBuiltInMetric(String metricName) {
     if (!metricDomain.endsWith(GOOGLE_APIS_DOMAIN_SUFFIX)) {
       return false; // domains like "my.org" are not Stackdriver built-in metrics.
     }
-    // All googleapis.com domains except "custom.googleapis.com" or "external.googleapis.com"
-    // are built-in metrics.
+    // All googleapis.com domains except "custom.googleapis.com", "external.googleapis.com",
+    // or "workload.googleapis.com" are built-in metrics.
     return !SUPPORTED_EXTERNAL_DOMAINS.contains(metricDomain);
   }
 }
diff --git a/exporters/trace/ocagent/src/main/java/io/opencensus/exporter/trace/ocagent/OcAgentNodeUtils.java b/exporters/trace/ocagent/src/main/java/io/opencensus/exporter/trace/ocagent/OcAgentNodeUtils.java
index a989e7c6d3..f4b028aa4b 100644
--- a/exporters/trace/ocagent/src/main/java/io/opencensus/exporter/trace/ocagent/OcAgentNodeUtils.java
+++ b/exporters/trace/ocagent/src/main/java/io/opencensus/exporter/trace/ocagent/OcAgentNodeUtils.java
@@ -38,7 +38,7 @@ final class OcAgentNodeUtils {
 
   // The current version of the OpenCensus OC-Agent Exporter.
   @VisibleForTesting
-  static final String OC_AGENT_EXPORTER_VERSION = "0.31.0-SNAPSHOT"; // CURRENT_OPENCENSUS_VERSION
+  static final String OC_AGENT_EXPORTER_VERSION = "0.32.0-SNAPSHOT"; // CURRENT_OPENCENSUS_VERSION
 
   @Nullable
   private static final io.opencensus.resource.Resource AUTO_DETECTED_RESOURCE =