diff --git a/.github/.OwlBot.lock.yaml b/.github/.OwlBot.lock.yaml
index 426cf83e2..f60d77493 100644
--- a/.github/.OwlBot.lock.yaml
+++ b/.github/.OwlBot.lock.yaml
@@ -13,4 +13,5 @@
 # limitations under the License.
 docker:
   image: gcr.io/cloud-devrel-public-resources/owlbot-java:latest
-  digest: sha256:b0b1c1c89570e229b1026372a2b8989ba31495007055b8d30178b7648503eefa
+  digest: sha256:fc52b202aa298a50a12c64efd04fea3884d867947effe2fa85382a246c09e813
+# created: 2022-04-06T16:30:03.627422514Z
diff --git a/.github/auto-label.yaml b/.github/auto-label.yaml
new file mode 100644
index 000000000..4caef688b
--- /dev/null
+++ b/.github/auto-label.yaml
@@ -0,0 +1,15 @@
+# Copyright 2021 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+requestsize:
+  enabled: true
diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index ab6ba39e6..2419b7cff 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -62,20 +62,6 @@ jobs:
     - run: java -version
     - run: .kokoro/install_dependencies.sh
     - run: .kokoro/dependencies.sh
-  linkage-monitor:
-    runs-on: ubuntu-latest
-    steps:
-    - uses: actions/checkout@v2
-    - uses: actions/setup-java@v1
-      with:
-        java-version: 8
-    - run: java -version
-    - run: .kokoro/install_dependencies.sh
-    - name: Install artifacts to local Maven repository
-      run: .kokoro/build.sh
-      shell: bash
-    - name: Validate dependencies with regard to com.google.cloud:libraries-bom (latest release)
-      uses: GoogleCloudPlatform/cloud-opensource-java/linkage-monitor@v1-linkagemonitor
   lint:
     runs-on: ubuntu-latest
     steps:
diff --git a/.github/workflows/downstream.yaml b/.github/workflows/downstream.yaml
index 4d38dbd5a..e9845f88e 100644
--- a/.github/workflows/downstream.yaml
+++ b/.github/workflows/downstream.yaml
@@ -133,9 +133,11 @@ jobs:
         - workflows
     steps:
     - uses: actions/checkout@v2
-    - uses: actions/setup-java@v1
+    - uses: actions/setup-java@v3
       with:
+        distribution: zulu
         java-version: ${{matrix.java}}
     - run: java -version
+    - run: sudo apt-get update -y
     - run: sudo apt-get install libxml2-utils
-    - run: .kokoro/downstream-client-library-check.sh google-api-client-bom ${{matrix.repo}}
\ No newline at end of file
+    - run: .kokoro/downstream-client-library-check.sh google-api-client-bom ${{matrix.repo}}
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 268a57971..4e62a043c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,24 @@
 # Changelog
 
+## [1.34.0](https://github.com/googleapis/google-api-java-client/compare/v1.33.4...v1.34.0) (2022-04-12)
+
+
+### Features
+
+* deprecate OOB auth flow in GooglePromptReceiver ([#2034](https://github.com/googleapis/google-api-java-client/issues/2034)) ([334d8d6](https://github.com/googleapis/google-api-java-client/commit/334d8d68a455e41be137ed27dab50df7915b3992))
+
+
+### Bug Fixes
+
+* **deps:** update dependency com.google.api-client:google-api-client to v1.33.4 ([#2022](https://github.com/googleapis/google-api-java-client/issues/2022)) ([582bde1](https://github.com/googleapis/google-api-java-client/commit/582bde1f48c892b5856d0c51d8e051be6d20321e))
+* **deps:** update dependency com.google.cloud:libraries-bom to v25.1.0 ([#2025](https://github.com/googleapis/google-api-java-client/issues/2025)) ([ba36a44](https://github.com/googleapis/google-api-java-client/commit/ba36a44e27f97edc5a6aa6921b43b753f51af569))
+* **deps:** update dependency com.google.oauth-client:google-oauth-client-bom to v1.33.2 ([#2033](https://github.com/googleapis/google-api-java-client/issues/2033)) ([fed93e3](https://github.com/googleapis/google-api-java-client/commit/fed93e3a3db2396d7a4bf4c565864ce1e39dc3ba))
+
+
+### Dependencies
+
+* revert protobuf to 3.19 ([#2035](https://github.com/googleapis/google-api-java-client/issues/2035)) ([00eabeb](https://github.com/googleapis/google-api-java-client/commit/00eabeb293fc6978a7667fbdc695b81add7d700a))
+
 ### [1.33.4](https://github.com/googleapis/google-api-java-client/compare/v1.33.3...v1.33.4) (2022-03-28)
 
 
diff --git a/google-api-client-android/pom.xml b/google-api-client-android/pom.xml
index 93ab13455..1a8bf6c61 100644
--- a/google-api-client-android/pom.xml
+++ b/google-api-client-android/pom.xml
@@ -4,7 +4,7 @@
   <parent>
     <groupId>com.google.api-client</groupId>
     <artifactId>google-api-client-parent</artifactId>
-    <version>1.33.4</version><!-- {x-version-update:google-api-client:current} -->
+    <version>1.34.0</version><!-- {x-version-update:google-api-client:current} -->
     <relativePath>../pom.xml</relativePath>
   </parent>
   <artifactId>google-api-client-android</artifactId>
diff --git a/google-api-client-appengine/pom.xml b/google-api-client-appengine/pom.xml
index 141d49eac..8e942e30f 100644
--- a/google-api-client-appengine/pom.xml
+++ b/google-api-client-appengine/pom.xml
@@ -4,7 +4,7 @@
   <parent>
     <groupId>com.google.api-client</groupId>
     <artifactId>google-api-client-parent</artifactId>
-    <version>1.33.4</version><!-- {x-version-update:google-api-client:current} -->
+    <version>1.34.0</version><!-- {x-version-update:google-api-client:current} -->
     <relativePath>../pom.xml</relativePath>
   </parent>
   <artifactId>google-api-client-appengine</artifactId>
diff --git a/google-api-client-assembly/pom.xml b/google-api-client-assembly/pom.xml
index 0d274c381..b23638331 100644
--- a/google-api-client-assembly/pom.xml
+++ b/google-api-client-assembly/pom.xml
@@ -4,7 +4,7 @@
   <parent>
     <groupId>com.google.api-client</groupId>
     <artifactId>google-api-client-parent</artifactId>
-    <version>1.33.4</version><!-- {x-version-update:google-api-client:current} -->
+    <version>1.34.0</version><!-- {x-version-update:google-api-client:current} -->
     <relativePath>../pom.xml</relativePath>
   </parent>
   <groupId>com.google.api-client</groupId>
diff --git a/google-api-client-bom/pom.xml b/google-api-client-bom/pom.xml
index 93a0c2f2a..5c859225b 100644
--- a/google-api-client-bom/pom.xml
+++ b/google-api-client-bom/pom.xml
@@ -3,7 +3,7 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>com.google.api-client</groupId>
   <artifactId>google-api-client-bom</artifactId>
-  <version>1.33.4</version><!-- {x-version-update:google-api-client:current} -->
+  <version>1.34.0</version><!-- {x-version-update:google-api-client:current} -->
   <packaging>pom</packaging>
 
   <name>Google API Client Library for Java BOM</name>
@@ -63,53 +63,53 @@
       <dependency>
         <groupId>com.google.api-client</groupId>
         <artifactId>google-api-client</artifactId>
-        <version>1.33.4</version><!-- {x-version-update:google-api-client:current} -->
+        <version>1.34.0</version><!-- {x-version-update:google-api-client:current} -->
       </dependency>
       <dependency>
         <groupId>com.google.api-client</groupId>
         <artifactId>google-api-client-android</artifactId>
-        <version>1.33.4</version><!-- {x-version-update:google-api-client:current} -->
+        <version>1.34.0</version><!-- {x-version-update:google-api-client:current} -->
       </dependency>
       <dependency>
         <groupId>com.google.api-client</groupId>
         <artifactId>google-api-client-appengine</artifactId>
-        <version>1.33.4</version><!-- {x-version-update:google-api-client:current} -->
+        <version>1.34.0</version><!-- {x-version-update:google-api-client:current} -->
       </dependency>
       <dependency>
         <groupId>com.google.api-client</groupId>
         <artifactId>google-api-client-assembly</artifactId>
-        <version>1.33.4</version><!-- {x-version-update:google-api-client:current} -->
+        <version>1.34.0</version><!-- {x-version-update:google-api-client:current} -->
         <type>pom</type>
       </dependency>
       <dependency>
         <groupId>com.google.api-client</groupId>
         <artifactId>google-api-client-gson</artifactId>
-        <version>1.33.4</version><!-- {x-version-update:google-api-client:current} -->
+        <version>1.34.0</version><!-- {x-version-update:google-api-client:current} -->
       </dependency>
       <dependency>
         <groupId>com.google.api-client</groupId>
         <artifactId>google-api-client-jackson2</artifactId>
-        <version>1.33.4</version><!-- {x-version-update:google-api-client:current} -->
+        <version>1.34.0</version><!-- {x-version-update:google-api-client:current} -->
       </dependency>
       <dependency>
         <groupId>com.google.api-client</groupId>
         <artifactId>google-api-client-java6</artifactId>
-        <version>1.33.4</version><!-- {x-version-update:google-api-client:current} -->
+        <version>1.34.0</version><!-- {x-version-update:google-api-client:current} -->
       </dependency>
       <dependency>
         <groupId>com.google.api-client</groupId>
         <artifactId>google-api-client-protobuf</artifactId>
-        <version>1.33.4</version><!-- {x-version-update:google-api-client:current} -->
+        <version>1.34.0</version><!-- {x-version-update:google-api-client:current} -->
       </dependency>
       <dependency>
         <groupId>com.google.api-client</groupId>
         <artifactId>google-api-client-servlet</artifactId>
-        <version>1.33.4</version><!-- {x-version-update:google-api-client:current} -->
+        <version>1.34.0</version><!-- {x-version-update:google-api-client:current} -->
       </dependency>
       <dependency>
         <groupId>com.google.api-client</groupId>
         <artifactId>google-api-client-xml</artifactId>
-        <version>1.33.4</version><!-- {x-version-update:google-api-client:current} -->
+        <version>1.34.0</version><!-- {x-version-update:google-api-client:current} -->
       </dependency>
     </dependencies>
   </dependencyManagement>
diff --git a/google-api-client-gson/pom.xml b/google-api-client-gson/pom.xml
index 748513867..7feb78d1f 100644
--- a/google-api-client-gson/pom.xml
+++ b/google-api-client-gson/pom.xml
@@ -4,7 +4,7 @@
   <parent>
     <groupId>com.google.api-client</groupId>
     <artifactId>google-api-client-parent</artifactId>
-    <version>1.33.4</version><!-- {x-version-update:google-api-client:current} -->
+    <version>1.34.0</version><!-- {x-version-update:google-api-client:current} -->
     <relativePath>../pom.xml</relativePath>
   </parent>
   <artifactId>google-api-client-gson</artifactId>
diff --git a/google-api-client-jackson2/pom.xml b/google-api-client-jackson2/pom.xml
index 9413b2b45..2f0de64bb 100644
--- a/google-api-client-jackson2/pom.xml
+++ b/google-api-client-jackson2/pom.xml
@@ -4,7 +4,7 @@
   <parent>
     <groupId>com.google.api-client</groupId>
     <artifactId>google-api-client-parent</artifactId>
-    <version>1.33.4</version><!-- {x-version-update:google-api-client:current} -->
+    <version>1.34.0</version><!-- {x-version-update:google-api-client:current} -->
     <relativePath>../pom.xml</relativePath>
   </parent>
   <artifactId>google-api-client-jackson2</artifactId>
diff --git a/google-api-client-java6/pom.xml b/google-api-client-java6/pom.xml
index ce5ae164e..67f493345 100644
--- a/google-api-client-java6/pom.xml
+++ b/google-api-client-java6/pom.xml
@@ -4,7 +4,7 @@
   <parent>
     <groupId>com.google.api-client</groupId>
     <artifactId>google-api-client-parent</artifactId>
-    <version>1.33.4</version><!-- {x-version-update:google-api-client:current} -->
+    <version>1.34.0</version><!-- {x-version-update:google-api-client:current} -->
     <relativePath>../pom.xml</relativePath>
   </parent>
   <artifactId>google-api-client-java6</artifactId>
diff --git a/google-api-client-java6/src/main/java/com/google/api/client/googleapis/extensions/java6/auth/oauth2/GooglePromptReceiver.java b/google-api-client-java6/src/main/java/com/google/api/client/googleapis/extensions/java6/auth/oauth2/GooglePromptReceiver.java
index 1a97fb27a..4e8e580c9 100644
--- a/google-api-client-java6/src/main/java/com/google/api/client/googleapis/extensions/java6/auth/oauth2/GooglePromptReceiver.java
+++ b/google-api-client-java6/src/main/java/com/google/api/client/googleapis/extensions/java6/auth/oauth2/GooglePromptReceiver.java
@@ -27,6 +27,7 @@
  * @since 1.11
  * @author Yaniv Inbar
  */
+@Deprecated
 public class GooglePromptReceiver extends AbstractPromptReceiver {
 
   @Override
diff --git a/google-api-client-protobuf/pom.xml b/google-api-client-protobuf/pom.xml
index 2099ecac3..910424811 100644
--- a/google-api-client-protobuf/pom.xml
+++ b/google-api-client-protobuf/pom.xml
@@ -4,7 +4,7 @@
   <parent>
     <groupId>com.google.api-client</groupId>
     <artifactId>google-api-client-parent</artifactId>
-    <version>1.33.4</version><!-- {x-version-update:google-api-client:current} -->
+    <version>1.34.0</version><!-- {x-version-update:google-api-client:current} -->
     <relativePath>../pom.xml</relativePath>
   </parent>
   <artifactId>google-api-client-protobuf</artifactId>
diff --git a/google-api-client-servlet/pom.xml b/google-api-client-servlet/pom.xml
index c3c9e93a2..e9ba886d0 100644
--- a/google-api-client-servlet/pom.xml
+++ b/google-api-client-servlet/pom.xml
@@ -4,7 +4,7 @@
   <parent>
     <groupId>com.google.api-client</groupId>
     <artifactId>google-api-client-parent</artifactId>
-    <version>1.33.4</version><!-- {x-version-update:google-api-client:current} -->
+    <version>1.34.0</version><!-- {x-version-update:google-api-client:current} -->
     <relativePath>../pom.xml</relativePath>
   </parent>
   <artifactId>google-api-client-servlet</artifactId>
diff --git a/google-api-client-xml/pom.xml b/google-api-client-xml/pom.xml
index 8fa2b1ab2..d69ebb605 100644
--- a/google-api-client-xml/pom.xml
+++ b/google-api-client-xml/pom.xml
@@ -4,7 +4,7 @@
   <parent>
     <groupId>com.google.api-client</groupId>
     <artifactId>google-api-client-parent</artifactId>
-    <version>1.33.4</version><!-- {x-version-update:google-api-client:current} -->
+    <version>1.34.0</version><!-- {x-version-update:google-api-client:current} -->
     <relativePath>../pom.xml</relativePath>
   </parent>
   <artifactId>google-api-client-xml</artifactId>
diff --git a/google-api-client/pom.xml b/google-api-client/pom.xml
index 29067363b..be7d1e4f8 100644
--- a/google-api-client/pom.xml
+++ b/google-api-client/pom.xml
@@ -4,7 +4,7 @@
   <parent>
     <groupId>com.google.api-client</groupId>
     <artifactId>google-api-client-parent</artifactId>
-    <version>1.33.4</version><!-- {x-version-update:google-api-client:current} -->
+    <version>1.34.0</version><!-- {x-version-update:google-api-client:current} -->
     <relativePath>../pom.xml</relativePath>
   </parent>
   <artifactId>google-api-client</artifactId>
diff --git a/pom.xml b/pom.xml
index c8e42b733..adb4d05b5 100644
--- a/pom.xml
+++ b/pom.xml
@@ -4,7 +4,7 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>com.google.api-client</groupId>
   <artifactId>google-api-client-parent</artifactId>
-  <version>1.33.4</version><!-- {x-version-update:google-api-client:current} -->
+  <version>1.34.0</version><!-- {x-version-update:google-api-client:current} -->
   <packaging>pom</packaging>
   <name>Parent for the Google API Client Library for Java</name>
   <description>The Google APIs Client Library for Java is a Java client library
@@ -288,7 +288,7 @@
         </plugin>
         <plugin>
           <artifactId>maven-surefire-plugin</artifactId>
-          <version>3.0.0-M5</version>
+          <version>3.0.0-M6</version>
           <configuration>
             <argLine>-Xmx1024m</argLine>
             <reportNameSuffix>sponge_log</reportNameSuffix>
@@ -493,10 +493,10 @@
   </build>
   <properties>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-    <project.http.version>1.41.5</project.http.version>
+    <project.http.version>1.41.7</project.http.version>
     <project.httpcore.version>4.4.15</project.httpcore.version>
     <project.httpclient.version>4.5.13</project.httpclient.version>
-    <project.oauth.version>1.33.1</project.oauth.version>
+    <project.oauth.version>1.33.2</project.oauth.version>
     <project.jsr305.version>3.0.2</project.jsr305.version>
     <project.gson.version>2.8.6</project.gson.version>
     <project.protobuf-java.version>3.19.4</project.protobuf-java.version>
diff --git a/samples/install-without-bom/pom.xml b/samples/install-without-bom/pom.xml
index 65eb8ab69..731a9df95 100644
--- a/samples/install-without-bom/pom.xml
+++ b/samples/install-without-bom/pom.xml
@@ -29,7 +29,7 @@
     <dependency>
       <groupId>com.google.api-client</groupId>
       <artifactId>google-api-client</artifactId>
-      <version>1.33.2</version>
+      <version>1.33.4</version>
     </dependency>
     <!-- [END google-api-client_install_without_bom] -->
 
diff --git a/samples/snapshot/pom.xml b/samples/snapshot/pom.xml
index e35bf3a11..9269ab5bb 100644
--- a/samples/snapshot/pom.xml
+++ b/samples/snapshot/pom.xml
@@ -28,7 +28,7 @@
     <dependency>
       <groupId>com.google.api-client</groupId>
       <artifactId>google-api-client</artifactId>
-      <version>1.33.2</version>
+      <version>1.33.4</version>
     </dependency>
   <!-- {x-version-update-end} -->
 
diff --git a/samples/snippets/pom.xml b/samples/snippets/pom.xml
index 71adef5fb..ee46ef086 100644
--- a/samples/snippets/pom.xml
+++ b/samples/snippets/pom.xml
@@ -30,7 +30,7 @@
       <dependency>
         <groupId>com.google.cloud</groupId>
         <artifactId>libraries-bom</artifactId>
-        <version>25.0.0</version>
+        <version>25.1.0</version>
         <type>pom</type>
         <scope>import</scope>
       </dependency>
diff --git a/versions.txt b/versions.txt
index 69d29bae7..613bb6394 100644
--- a/versions.txt
+++ b/versions.txt
@@ -1,4 +1,4 @@
 # Format:
 # module:released-version:current-version
 
-google-api-client:1.33.4:1.33.4
+google-api-client:1.34.0:1.34.0