diff --git a/.github/.OwlBot.lock.yaml b/.github/.OwlBot.lock.yaml
index 9351fdfb9..3473042c0 100644
--- a/.github/.OwlBot.lock.yaml
+++ b/.github/.OwlBot.lock.yaml
@@ -13,4 +13,4 @@
 # limitations under the License.
 docker:
   image: gcr.io/cloud-devrel-public-resources/owlbot-java:latest
-  digest: sha256:387835a1375a0049ec44e02542c844302854c732d8291bdf8e472c0ff70a8f67
+  digest: sha256:df8d7b2cc0dbc65871e7edd86601901a0612b272fa3f7f0eb590c5c53aa5f92e
diff --git a/.github/workflows/approve-readme.yaml b/.github/workflows/approve-readme.yaml
index 1bb182327..f5fc7d516 100644
--- a/.github/workflows/approve-readme.yaml
+++ b/.github/workflows/approve-readme.yaml
@@ -21,7 +21,7 @@ jobs:
     runs-on: ubuntu-latest
     if: github.repository_owner == 'googleapis' && github.head_ref == 'autosynth-readme'
     steps:
-      - uses: actions/github-script@v5
+      - uses: actions/github-script@v6
         with:
           github-token: ${{secrets.YOSHI_APPROVER_TOKEN}}
           script: |
diff --git a/.github/workflows/auto-release.yaml b/.github/workflows/auto-release.yaml
index 18e23230d..7a106d007 100644
--- a/.github/workflows/auto-release.yaml
+++ b/.github/workflows/auto-release.yaml
@@ -21,7 +21,7 @@ jobs:
     runs-on: ubuntu-latest
     if: contains(github.head_ref, 'release-please')
     steps:
-    - uses: actions/github-script@v5
+    - uses: actions/github-script@v6
       with:
         github-token: ${{secrets.YOSHI_APPROVER_TOKEN}}
         debug: true
diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index 6b5e56aaa..83ef7f9c2 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -27,8 +27,8 @@ jobs:
       matrix:
         java: [8, 11, 17]
     steps:
-    - uses: actions/checkout@v2
-    - uses: actions/setup-java@v2
+    - uses: actions/checkout@v3
+    - uses: actions/setup-java@v3
       with:
         distribution: zulu
         java-version: ${{matrix.java}}
@@ -39,8 +39,8 @@ jobs:
   windows:
     runs-on: windows-latest
     steps:
-    - uses: actions/checkout@v2
-    - uses: actions/setup-java@v2
+    - uses: actions/checkout@v3
+    - uses: actions/setup-java@v3
       with:
         distribution: zulu
         java-version: 8
@@ -54,8 +54,8 @@ jobs:
       matrix:
         java: [8, 11, 17]
     steps:
-    - uses: actions/checkout@v2
-    - uses: actions/setup-java@v2
+    - uses: actions/checkout@v3
+    - uses: actions/setup-java@v3
       with:
         distribution: zulu
         java-version: ${{matrix.java}}
@@ -64,8 +64,8 @@ jobs:
   lint:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v2
-    - uses: actions/setup-java@v2
+    - uses: actions/checkout@v3
+    - uses: actions/setup-java@v3
       with:
         distribution: zulu
         java-version: 11
@@ -76,8 +76,8 @@ jobs:
   clirr:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v2
-    - uses: actions/setup-java@v2
+    - uses: actions/checkout@v3
+    - uses: actions/setup-java@v3
       with:
         distribution: zulu
         java-version: 8
diff --git a/.github/workflows/samples.yaml b/.github/workflows/samples.yaml
index d5d964df1..912ed8b2b 100644
--- a/.github/workflows/samples.yaml
+++ b/.github/workflows/samples.yaml
@@ -20,9 +20,10 @@ jobs:
   checkstyle:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
-      - uses: actions/setup-java@v1
+      - uses: actions/checkout@v3
+      - uses: actions/setup-java@v3
         with:
+          distribution: zulu
           java-version: 8
       - name: Run checkstyle
         run: mvn -P lint --quiet --batch-mode checkstyle:check
diff --git a/.kokoro/build.bat b/.kokoro/build.bat
index cc602c9eb..067cf4a4c 100644
--- a/.kokoro/build.bat
+++ b/.kokoro/build.bat
@@ -1,18 +1,18 @@
+:: Copyright 2022 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.
+:: Github action job to test core java library features on
+:: downstream client libraries before they are released.
 :: See documentation in type-shell-output.bat
-# Copyright 2022 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.
-# Github action job to test core java library features on
-# downstream client libraries before they are released.
 
 "C:\Program Files\Git\bin\bash.exe" %~dp0build.sh
diff --git a/CHANGELOG.md b/CHANGELOG.md
index adee17fdf..5cef063aa 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,13 @@
 # Changelog
 
+### [4.5.6](https://github.com/googleapis/java-dialogflow/compare/v4.5.5...v4.5.6) (2022-03-03)
+
+
+### Dependencies
+
+* update dependency com.google.cloud:google-cloud-core to v2.5.6 ([#872](https://github.com/googleapis/java-dialogflow/issues/872)) ([a7506fc](https://github.com/googleapis/java-dialogflow/commit/a7506fcae4b9f8294a371fa41c5d4ba19bfbc9d1))
+* update dependency com.google.cloud:google-cloud-shared-dependencies to v2.8.0 ([#873](https://github.com/googleapis/java-dialogflow/issues/873)) ([583aa83](https://github.com/googleapis/java-dialogflow/commit/583aa83983484322297092bec814aaf4863d4125))
+
 ### [4.5.5](https://github.com/googleapis/java-dialogflow/compare/v4.5.4...v4.5.5) (2022-03-01)
 
 
diff --git a/README.md b/README.md
index ee88331cc..c80e7395a 100644
--- a/README.md
+++ b/README.md
@@ -19,7 +19,7 @@ If you are using Maven with [BOM][libraries-bom], add this to your pom.xml file
     <dependency>
       <groupId>com.google.cloud</groupId>
       <artifactId>libraries-bom</artifactId>
-      <version>24.3.0</version>
+      <version>24.4.0</version>
       <type>pom</type>
       <scope>import</scope>
     </dependency>
@@ -41,7 +41,7 @@ If you are using Maven without BOM, add this to your dependencies:
 <dependency>
   <groupId>com.google.cloud</groupId>
   <artifactId>google-cloud-dialogflow</artifactId>
-  <version>4.5.3</version>
+  <version>4.5.5</version>
 </dependency>
 
 ```
@@ -49,20 +49,20 @@ If you are using Maven without BOM, add this to your dependencies:
 If you are using Gradle 5.x or later, add this to your dependencies
 
 ```Groovy
-implementation platform('com.google.cloud:libraries-bom:24.3.0')
+implementation platform('com.google.cloud:libraries-bom:24.4.0')
 
 implementation 'com.google.cloud:google-cloud-dialogflow'
 ```
 If you are using Gradle without BOM, add this to your dependencies
 
 ```Groovy
-implementation 'com.google.cloud:google-cloud-dialogflow:4.5.4'
+implementation 'com.google.cloud:google-cloud-dialogflow:4.5.5'
 ```
 
 If you are using SBT, add this to your dependencies
 
 ```Scala
-libraryDependencies += "com.google.cloud" % "google-cloud-dialogflow" % "4.5.4"
+libraryDependencies += "com.google.cloud" % "google-cloud-dialogflow" % "4.5.5"
 ```
 
 ## Authentication
diff --git a/google-cloud-dialogflow-bom/pom.xml b/google-cloud-dialogflow-bom/pom.xml
index 508710378..dfa2d6fa5 100644
--- a/google-cloud-dialogflow-bom/pom.xml
+++ b/google-cloud-dialogflow-bom/pom.xml
@@ -3,7 +3,7 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>com.google.cloud</groupId>
   <artifactId>google-cloud-dialogflow-bom</artifactId>
-  <version>4.5.5</version><!-- {x-version-update:google-cloud-dialogflow:current} -->
+  <version>4.5.6</version><!-- {x-version-update:google-cloud-dialogflow:current} -->
   <packaging>pom</packaging>
   <parent>
     <groupId>com.google.cloud</groupId>
@@ -52,27 +52,27 @@
       <dependency>
         <groupId>com.google.cloud</groupId>
         <artifactId>google-cloud-dialogflow</artifactId>
-        <version>4.5.5</version><!-- {x-version-update:google-cloud-dialogflow:current} -->
+        <version>4.5.6</version><!-- {x-version-update:google-cloud-dialogflow:current} -->
       </dependency>
       <dependency>
         <groupId>com.google.api.grpc</groupId>
         <artifactId>grpc-google-cloud-dialogflow-v2beta1</artifactId>
-        <version>0.103.5</version><!-- {x-version-update:grpc-google-cloud-dialogflow-v2beta1:current} -->
+        <version>0.103.6</version><!-- {x-version-update:grpc-google-cloud-dialogflow-v2beta1:current} -->
       </dependency>
       <dependency>
         <groupId>com.google.api.grpc</groupId>
         <artifactId>grpc-google-cloud-dialogflow-v2</artifactId>
-        <version>4.5.5</version><!-- {x-version-update:grpc-google-cloud-dialogflow-v2:current} -->
+        <version>4.5.6</version><!-- {x-version-update:grpc-google-cloud-dialogflow-v2:current} -->
       </dependency>
       <dependency>
         <groupId>com.google.api.grpc</groupId>
         <artifactId>proto-google-cloud-dialogflow-v2</artifactId>
-        <version>4.5.5</version><!-- {x-version-update:proto-google-cloud-dialogflow-v2:current} -->
+        <version>4.5.6</version><!-- {x-version-update:proto-google-cloud-dialogflow-v2:current} -->
       </dependency>
       <dependency>
         <groupId>com.google.api.grpc</groupId>
         <artifactId>proto-google-cloud-dialogflow-v2beta1</artifactId>
-        <version>0.103.5</version><!-- {x-version-update:proto-google-cloud-dialogflow-v2beta1:current} -->
+        <version>0.103.6</version><!-- {x-version-update:proto-google-cloud-dialogflow-v2beta1:current} -->
       </dependency>
     </dependencies>
   </dependencyManagement>
diff --git a/google-cloud-dialogflow/pom.xml b/google-cloud-dialogflow/pom.xml
index 8f055ae2e..460c51ecb 100644
--- a/google-cloud-dialogflow/pom.xml
+++ b/google-cloud-dialogflow/pom.xml
@@ -3,7 +3,7 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>com.google.cloud</groupId>
   <artifactId>google-cloud-dialogflow</artifactId>
-  <version>4.5.5</version><!-- {x-version-update:google-cloud-dialogflow:current} -->
+  <version>4.5.6</version><!-- {x-version-update:google-cloud-dialogflow:current} -->
   <packaging>jar</packaging>
   <name>Google Cloud Dialog Flow API</name>
   <url>https://github.com/googleapis/java-dialogflow</url>
@@ -11,7 +11,7 @@
   <parent>
     <groupId>com.google.cloud</groupId>
     <artifactId>google-cloud-dialogflow-parent</artifactId>
-    <version>4.5.5</version><!-- {x-version-update:google-cloud-dialogflow:current} -->
+    <version>4.5.6</version><!-- {x-version-update:google-cloud-dialogflow:current} -->
   </parent>
   <properties>
     <site.installationModule>google-cloud-dialogflow</site.installationModule>
diff --git a/grpc-google-cloud-dialogflow-v2/pom.xml b/grpc-google-cloud-dialogflow-v2/pom.xml
index f04091674..d08cf6a6f 100644
--- a/grpc-google-cloud-dialogflow-v2/pom.xml
+++ b/grpc-google-cloud-dialogflow-v2/pom.xml
@@ -4,13 +4,13 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>com.google.api.grpc</groupId>
   <artifactId>grpc-google-cloud-dialogflow-v2</artifactId>
-  <version>4.5.5</version><!-- {x-version-update:grpc-google-cloud-dialogflow-v2:current} -->
+  <version>4.5.6</version><!-- {x-version-update:grpc-google-cloud-dialogflow-v2:current} -->
   <name>grpc-google-cloud-dialogflow-v2</name>
   <description>GRPC library for grpc-google-cloud-dialogflow-v2</description>
   <parent>
     <groupId>com.google.cloud</groupId>
     <artifactId>google-cloud-dialogflow-parent</artifactId>
-    <version>4.5.5</version><!-- {x-version-update:google-cloud-dialogflow:current} -->
+    <version>4.5.6</version><!-- {x-version-update:google-cloud-dialogflow:current} -->
   </parent>
   <dependencies>
     <dependency>
diff --git a/grpc-google-cloud-dialogflow-v2beta1/pom.xml b/grpc-google-cloud-dialogflow-v2beta1/pom.xml
index 74baa8ec4..cb4a91317 100644
--- a/grpc-google-cloud-dialogflow-v2beta1/pom.xml
+++ b/grpc-google-cloud-dialogflow-v2beta1/pom.xml
@@ -4,13 +4,13 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>com.google.api.grpc</groupId>
   <artifactId>grpc-google-cloud-dialogflow-v2beta1</artifactId>
-  <version>0.103.5</version><!-- {x-version-update:grpc-google-cloud-dialogflow-v2beta1:current} -->
+  <version>0.103.6</version><!-- {x-version-update:grpc-google-cloud-dialogflow-v2beta1:current} -->
   <name>grpc-google-cloud-dialogflow-v2beta1</name>
   <description>GRPC library for grpc-google-cloud-dialogflow-v2beta1</description>
   <parent>
     <groupId>com.google.cloud</groupId>
     <artifactId>google-cloud-dialogflow-parent</artifactId>
-    <version>4.5.5</version><!-- {x-version-update:google-cloud-dialogflow:current} -->
+    <version>4.5.6</version><!-- {x-version-update:google-cloud-dialogflow:current} -->
   </parent>
   <dependencies>
     <dependency>
diff --git a/pom.xml b/pom.xml
index 8b9f33ebd..2c125a60f 100644
--- a/pom.xml
+++ b/pom.xml
@@ -4,7 +4,7 @@
   <groupId>com.google.cloud</groupId>
   <artifactId>google-cloud-dialogflow-parent</artifactId>
   <packaging>pom</packaging>
-  <version>4.5.5</version><!-- {x-version-update:google-cloud-dialogflow:current} -->
+  <version>4.5.6</version><!-- {x-version-update:google-cloud-dialogflow:current} -->
   <name>Google Cloud Dialog Flow API Parent</name>
   <url>https://github.com/googleapis/java-dialogflow</url>
   <description>
@@ -61,32 +61,32 @@
       <dependency>
         <groupId>com.google.api.grpc</groupId>
         <artifactId>proto-google-cloud-dialogflow-v2</artifactId>
-        <version>4.5.5</version><!-- {x-version-update:proto-google-cloud-dialogflow-v2:current} -->
+        <version>4.5.6</version><!-- {x-version-update:proto-google-cloud-dialogflow-v2:current} -->
       </dependency>
       <dependency>
         <groupId>com.google.api.grpc</groupId>
         <artifactId>proto-google-cloud-dialogflow-v2beta1</artifactId>
-        <version>0.103.5</version><!-- {x-version-update:proto-google-cloud-dialogflow-v2beta1:current} -->
+        <version>0.103.6</version><!-- {x-version-update:proto-google-cloud-dialogflow-v2beta1:current} -->
       </dependency>
       <dependency>
         <groupId>com.google.api.grpc</groupId>
         <artifactId>grpc-google-cloud-dialogflow-v2beta1</artifactId>
-        <version>0.103.5</version><!-- {x-version-update:grpc-google-cloud-dialogflow-v2beta1:current} -->
+        <version>0.103.6</version><!-- {x-version-update:grpc-google-cloud-dialogflow-v2beta1:current} -->
       </dependency>
       <dependency>
         <groupId>com.google.api.grpc</groupId>
         <artifactId>grpc-google-cloud-dialogflow-v2</artifactId>
-        <version>4.5.5</version><!-- {x-version-update:grpc-google-cloud-dialogflow-v2:current} -->
+        <version>4.5.6</version><!-- {x-version-update:grpc-google-cloud-dialogflow-v2:current} -->
       </dependency>
       <dependency>
         <groupId>com.google.cloud</groupId>
         <artifactId>google-cloud-dialogflow</artifactId>
-        <version>4.5.5</version><!-- {x-version-update:google-cloud-dialogflow:current} -->
+        <version>4.5.6</version><!-- {x-version-update:google-cloud-dialogflow:current} -->
       </dependency>
       <dependency>
         <groupId>com.google.cloud</groupId>
         <artifactId>google-cloud-shared-dependencies</artifactId>
-        <version>2.7.0</version>
+        <version>2.8.0</version>
         <type>pom</type>
         <scope>import</scope>
       </dependency>
diff --git a/proto-google-cloud-dialogflow-v2/pom.xml b/proto-google-cloud-dialogflow-v2/pom.xml
index cf7ba6921..93c2907d1 100644
--- a/proto-google-cloud-dialogflow-v2/pom.xml
+++ b/proto-google-cloud-dialogflow-v2/pom.xml
@@ -4,13 +4,13 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>com.google.api.grpc</groupId>
   <artifactId>proto-google-cloud-dialogflow-v2</artifactId>
-  <version>4.5.5</version><!-- {x-version-update:proto-google-cloud-dialogflow-v2:current} -->
+  <version>4.5.6</version><!-- {x-version-update:proto-google-cloud-dialogflow-v2:current} -->
   <name>proto-google-cloud-dialogflow-v2</name>
   <description>PROTO library for proto-google-cloud-dialogflow-v2</description>
   <parent>
     <groupId>com.google.cloud</groupId>
     <artifactId>google-cloud-dialogflow-parent</artifactId>
-    <version>4.5.5</version><!-- {x-version-update:google-cloud-dialogflow:current} -->
+    <version>4.5.6</version><!-- {x-version-update:google-cloud-dialogflow:current} -->
   </parent>
   <dependencies>
     <dependency>
diff --git a/proto-google-cloud-dialogflow-v2beta1/pom.xml b/proto-google-cloud-dialogflow-v2beta1/pom.xml
index 200021393..1d2410759 100644
--- a/proto-google-cloud-dialogflow-v2beta1/pom.xml
+++ b/proto-google-cloud-dialogflow-v2beta1/pom.xml
@@ -4,13 +4,13 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>com.google.api.grpc</groupId>
   <artifactId>proto-google-cloud-dialogflow-v2beta1</artifactId>
-  <version>0.103.5</version><!-- {x-version-update:proto-google-cloud-dialogflow-v2beta1:current} -->
+  <version>0.103.6</version><!-- {x-version-update:proto-google-cloud-dialogflow-v2beta1:current} -->
   <name>proto-google-cloud-dialogflow-v2beta1</name>
   <description>PROTO library for proto-google-cloud-dialogflow-v2beta1</description>
   <parent>
     <groupId>com.google.cloud</groupId>
     <artifactId>google-cloud-dialogflow-parent</artifactId>
-    <version>4.5.5</version><!-- {x-version-update:google-cloud-dialogflow:current} -->
+    <version>4.5.6</version><!-- {x-version-update:google-cloud-dialogflow:current} -->
   </parent>
   <dependencies>
     <dependency>
diff --git a/samples/install-without-bom/pom.xml b/samples/install-without-bom/pom.xml
index d76d6822f..87f53df1c 100644
--- a/samples/install-without-bom/pom.xml
+++ b/samples/install-without-bom/pom.xml
@@ -29,14 +29,14 @@
     <dependency>
       <groupId>com.google.cloud</groupId>
       <artifactId>google-cloud-dialogflow</artifactId>
-      <version>4.5.3</version>
+      <version>4.5.5</version>
     </dependency>
     <!-- [END dialogflow_install_without_bom] -->
 
     <dependency>
       <groupId>com.google.cloud</groupId>
       <artifactId>google-cloud-core</artifactId>
-      <version>2.5.5</version>
+      <version>2.5.6</version>
       <scope>test</scope>
       <classifier>tests</classifier>
     </dependency>
diff --git a/samples/snapshot/pom.xml b/samples/snapshot/pom.xml
index f5cc8a37c..a84b511a8 100644
--- a/samples/snapshot/pom.xml
+++ b/samples/snapshot/pom.xml
@@ -28,13 +28,13 @@
     <dependency>
       <groupId>com.google.cloud</groupId>
       <artifactId>google-cloud-dialogflow</artifactId>
-      <version>4.5.3</version>
+      <version>4.5.5</version>
     </dependency>
 
     <dependency>
       <groupId>com.google.cloud</groupId>
       <artifactId>google-cloud-core</artifactId>
-      <version>2.5.5</version>
+      <version>2.5.6</version>
       <scope>test</scope>
       <classifier>tests</classifier>
     </dependency>
diff --git a/samples/snippets/pom.xml b/samples/snippets/pom.xml
index 16202c8a2..eb8f8364d 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>24.3.0</version>
+        <version>24.4.0</version>
         <type>pom</type>
         <scope>import</scope>
       </dependency>
@@ -47,7 +47,7 @@
     <dependency>
       <groupId>com.google.cloud</groupId>
       <artifactId>google-cloud-core</artifactId>
-      <version>2.5.5</version>
+      <version>2.5.6</version>
       <scope>test</scope>
       <classifier>tests</classifier>
     </dependency>
diff --git a/versions.txt b/versions.txt
index c5b2b99aa..152f25362 100644
--- a/versions.txt
+++ b/versions.txt
@@ -1,8 +1,8 @@
 # Format:
 # module:released-version:current-version
 
-google-cloud-dialogflow:4.5.5:4.5.5
-grpc-google-cloud-dialogflow-v2beta1:0.103.5:0.103.5
-grpc-google-cloud-dialogflow-v2:4.5.5:4.5.5
-proto-google-cloud-dialogflow-v2:4.5.5:4.5.5
-proto-google-cloud-dialogflow-v2beta1:0.103.5:0.103.5
+google-cloud-dialogflow:4.5.6:4.5.6
+grpc-google-cloud-dialogflow-v2beta1:0.103.6:0.103.6
+grpc-google-cloud-dialogflow-v2:4.5.6:4.5.6
+proto-google-cloud-dialogflow-v2:4.5.6:4.5.6
+proto-google-cloud-dialogflow-v2beta1:0.103.6:0.103.6