diff --git a/.github/workflows/ci-maven.yaml b/.github/workflows/ci-maven.yaml
index 2540ce063b..7c0ed6333d 100644
--- a/.github/workflows/ci-maven.yaml
+++ b/.github/workflows/ci-maven.yaml
@@ -151,6 +151,21 @@ jobs:
         # Exclude the root project
         run: mvn -B -ntp fmt:check
 
+  compatibility:
+    runs-on: ubuntu-22.04
+    steps:
+      - uses: actions/checkout@v3
+      - uses: actions/setup-java@v3
+        with:
+          java-version: 11
+          distribution: temurin
+          cache: maven
+      - run: java -version
+      - name: Compatibility check
+        #  package jar so that gapic-generator-java module can use
+        #  testlib modules of gax
+        run: mvn package clirr:check -DskipTests
+
   showcase:
     runs-on: ubuntu-22.04
     strategy:
diff --git a/gax-java/dependencies.properties b/gax-java/dependencies.properties
index 1b8608303a..c69108447e 100644
--- a/gax-java/dependencies.properties
+++ b/gax-java/dependencies.properties
@@ -40,17 +40,17 @@ maven.io_opencensus_opencensus_api=io.opencensus:opencensus-api:0.31.1
 maven.io_opencensus_opencensus_contrib_grpc_metrics=io.opencensus:opencensus-contrib-grpc-metrics:0.31.1
 maven.io_opencensus_opencensus_contrib_http_util=io.opencensus:opencensus-contrib-http-util:0.31.1
 maven.io_netty_netty_tcnative_boringssl_static=io.netty:netty-tcnative-boringssl-static:2.0.59.Final
-maven.io_netty_netty_handler=io.netty:netty-handler:4.1.89.Final
-maven.io_netty_netty_common=io.netty:netty-common:4.1.89.Final
-maven.io_netty_netty_codec_socks=io.netty:netty-codec-socks:4.1.89.Final
-maven.io_netty_netty_codec_http2=io.netty:netty-codec-http2:4.1.89.Final
-maven.io_netty_netty_codec_http=io.netty:netty-codec-http:4.1.89.Final
-maven.io_netty_netty_codec=io.netty:netty-codec:4.1.89.Final
-maven.io_netty_netty_buffer=io.netty:netty-buffer:4.1.89.Final
-maven.io_netty_netty_resolver=io.netty:netty-resolver:4.1.89.Final
-maven.io_netty_netty_transport=io.netty:netty-transport:4.1.89.Final
-maven.io_netty_netty_handler_proxy=io.netty:netty-handler-proxy:4.1.89.Final
-maven.io_netty_netty_transport_native_unix_common=io.netty:netty-transport-native-unix-common:4.1.89.Final
+maven.io_netty_netty_handler=io.netty:netty-handler:4.1.90.Final
+maven.io_netty_netty_common=io.netty:netty-common:4.1.90.Final
+maven.io_netty_netty_codec_socks=io.netty:netty-codec-socks:4.1.90.Final
+maven.io_netty_netty_codec_http2=io.netty:netty-codec-http2:4.1.90.Final
+maven.io_netty_netty_codec_http=io.netty:netty-codec-http:4.1.90.Final
+maven.io_netty_netty_codec=io.netty:netty-codec:4.1.90.Final
+maven.io_netty_netty_buffer=io.netty:netty-buffer:4.1.90.Final
+maven.io_netty_netty_resolver=io.netty:netty-resolver:4.1.90.Final
+maven.io_netty_netty_transport=io.netty:netty-transport:4.1.90.Final
+maven.io_netty_netty_handler_proxy=io.netty:netty-handler-proxy:4.1.90.Final
+maven.io_netty_netty_transport_native_unix_common=io.netty:netty-transport-native-unix-common:4.1.90.Final
 maven.io_perfmark_perfmark_api=io.perfmark:perfmark-api:0.26.0
 maven.org_apache_tomcat_annotations_api=org.apache.tomcat:annotations-api:6.0.53
 maven.com_google_code_gson_gson=com.google.code.gson:gson:2.10.1
diff --git a/gax-java/gax-httpjson/src/main/java/com/google/api/gax/httpjson/HttpRequestRunnable.java b/gax-java/gax-httpjson/src/main/java/com/google/api/gax/httpjson/HttpRequestRunnable.java
index 2edb4ceb2e..cc0ca4c20d 100644
--- a/gax-java/gax-httpjson/src/main/java/com/google/api/gax/httpjson/HttpRequestRunnable.java
+++ b/gax-java/gax-httpjson/src/main/java/com/google/api/gax/httpjson/HttpRequestRunnable.java
@@ -172,7 +172,7 @@ HttpRequest createHttpRequest() throws IOException {
       jsonFactory.createJsonParser(requestBody).parse(tokenRequest);
       jsonHttpContent =
           new JsonHttpContent(jsonFactory, tokenRequest)
-              .setMediaType((new HttpMediaType("application/json")));
+              .setMediaType((new HttpMediaType("application/json; charset=utf-8")));
     } else {
       // Force underlying HTTP lib to set Content-Length header to avoid 411s.
       // See EmptyContent.java.
diff --git a/gax-java/gax-httpjson/src/test/java/com/google/api/gax/httpjson/HttpRequestRunnableTest.java b/gax-java/gax-httpjson/src/test/java/com/google/api/gax/httpjson/HttpRequestRunnableTest.java
index f68b11feba..4e825d679d 100644
--- a/gax-java/gax-httpjson/src/test/java/com/google/api/gax/httpjson/HttpRequestRunnableTest.java
+++ b/gax-java/gax-httpjson/src/test/java/com/google/api/gax/httpjson/HttpRequestRunnableTest.java
@@ -36,6 +36,8 @@
 import com.google.longrunning.ListOperationsRequest;
 import com.google.protobuf.Empty;
 import com.google.protobuf.Field;
+import com.google.protobuf.util.JsonFormat;
+import java.io.ByteArrayOutputStream;
 import java.io.IOException;
 import java.util.Arrays;
 import java.util.HashMap;
@@ -177,4 +179,67 @@ public void testRequestUrlUnnormalizedPatch() throws IOException {
     Truth.assertThat(httpRequest.getRequestMethod()).isEqualTo("POST");
     Truth.assertThat(httpRequest.getHeaders().get("X-HTTP-Method-Override")).isEqualTo("PATCH");
   }
+
+  /*
+  We use a separate RequestFormatter because formatting the body requests is what sets the charset to be UTF-8.
+  The other tests above do not have a set a body request and instead send an EmptyContent (null Type/ CharSet)
+  */
+  @Test
+  public void testUnicodeValuesInBody() throws IOException {
+    HttpRequestFormatter<Field> bodyRequestFormatter =
+        ProtoMessageRequestFormatter.<Field>newBuilder()
+            .setPath(
+                "/name/{name=*}",
+                request -> {
+                  Map<String, String> fields = new HashMap<>();
+                  ProtoRestSerializer<Field> serializer = ProtoRestSerializer.create();
+                  serializer.putPathParam(fields, "name", request.getName());
+                  return fields;
+                })
+            .setQueryParamsExtractor(request -> new HashMap<>())
+            .setRequestBodyExtractor(
+                request ->
+                    ProtoRestSerializer.create().toBody("*", request.toBuilder().build(), true))
+            .build();
+
+    Field bodyRequestMessage =
+        Field.newBuilder()
+            .setName("feline ☺ → ←")
+            .setNumber(2)
+            .setDefaultValue("bird ☺ → ←")
+            .setJsonName("mouse ☺ → ←")
+            .setTypeUrl("small ☺ → ←")
+            .build();
+
+    ApiMethodDescriptor<Field, Empty> methodDescriptor =
+        ApiMethodDescriptor.<Field, Empty>newBuilder()
+            .setFullMethodName("house.cat.get")
+            .setHttpMethod("PUT")
+            .setRequestFormatter(bodyRequestFormatter)
+            .setResponseParser(responseParser)
+            .build();
+
+    HttpRequestRunnable<Field, Empty> httpRequestRunnable =
+        new HttpRequestRunnable<>(
+            bodyRequestMessage,
+            methodDescriptor,
+            "www.googleapis.com/animals/v1/projects",
+            HttpJsonCallOptions.newBuilder().build(),
+            new MockHttpTransport(),
+            HttpJsonMetadata.newBuilder().build(),
+            (result) -> {});
+
+    HttpRequest httpRequest = httpRequestRunnable.createHttpRequest();
+    Truth.assertThat(httpRequest.getContent().getType())
+        .isEqualTo("application/json; charset=utf-8");
+    try (ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream()) {
+      // writeTo() uses the Charset when writing to the stream
+      httpRequest.getContent().writeTo(byteArrayOutputStream);
+      String output = byteArrayOutputStream.toString();
+      Field.Builder expectedBuilder = Field.newBuilder();
+      JsonFormat.parser().merge(output, expectedBuilder);
+      Field result = expectedBuilder.build();
+      Truth.assertThat(result).isEqualTo(bodyRequestMessage);
+    }
+  }
 }
diff --git a/java-iam/pom.xml b/java-iam/pom.xml
index 4d43b05cb9..ef5dcabae0 100644
--- a/java-iam/pom.xml
+++ b/java-iam/pom.xml
@@ -98,7 +98,7 @@
       <dependency>
         <groupId>com.google.cloud</groupId>
         <artifactId>google-iam-policy</artifactId>
-        <version>1.9.4-SNAPSHOT</version><!-- {x-version-update:google-iam-policy:current} -->
+        <version>1.11.0</version><!-- {x-version-update:google-iam-policy:current} -->
       </dependency>
       <dependency>
         <groupId>com.google.api.grpc</groupId>