diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8f8e35b40..923e11843 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,12 @@
 # Changelog
 
+## [4.9.1](https://github.com/googleapis/java-dialogflow/compare/v4.9.0...v4.9.1) (2022-10-07)
+
+
+### Dependencies
+
+* Update dependency com.google.cloud:google-cloud-core to v2.8.20 ([#1030](https://github.com/googleapis/java-dialogflow/issues/1030)) ([86aad23](https://github.com/googleapis/java-dialogflow/commit/86aad238bab432a62a0ad58811479d6f0ae1a431))
+
 ## [4.9.0](https://github.com/googleapis/java-dialogflow/compare/v4.8.7...v4.9.0) (2022-10-05)
 
 
diff --git a/README.md b/README.md
index 349045dd0..12e9c3f37 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>26.1.2</version>
+      <version>26.1.3</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>4.8.6</version>
+  <version>4.9.0</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:26.1.2')
+implementation platform('com.google.cloud:libraries-bom:26.1.3')
 
 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:4.8.6'
+implementation 'com.google.cloud:google-cloud-dialogflow:4.9.0'
 ```
 
 If you are using SBT, add this to your dependencies:
 
 ```Scala
-libraryDependencies += "com.google.cloud" % "google-cloud-dialogflow" % "4.8.6"
+libraryDependencies += "com.google.cloud" % "google-cloud-dialogflow" % "4.9.0"
 ```
 
 ## Authentication
diff --git a/google-cloud-dialogflow-bom/pom.xml b/google-cloud-dialogflow-bom/pom.xml
index 3f65ca449..7717221f4 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>4.9.0</version><!-- {x-version-update:google-cloud-dialogflow:current} -->
+  <version>4.9.1</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>4.9.0</version><!-- {x-version-update:google-cloud-dialogflow:current} -->
+        <version>4.9.1</version><!-- {x-version-update:google-cloud-dialogflow:current} -->
       </dependency>
       <dependency>
         <groupId>com.google.api.grpc</groupId>
         <artifactId>grpc-google-cloud-dialogflow-v2beta1</artifactId>
-        <version>0.107.0</version><!-- {x-version-update:grpc-google-cloud-dialogflow-v2beta1:current} -->
+        <version>0.107.1</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>4.9.0</version><!-- {x-version-update:grpc-google-cloud-dialogflow-v2:current} -->
+        <version>4.9.1</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>4.9.0</version><!-- {x-version-update:proto-google-cloud-dialogflow-v2:current} -->
+        <version>4.9.1</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>0.107.0</version><!-- {x-version-update:proto-google-cloud-dialogflow-v2beta1:current} -->
+        <version>0.107.1</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 6497f9908..85aef6413 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>4.9.0</version><!-- {x-version-update:google-cloud-dialogflow:current} -->
+  <version>4.9.1</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>4.9.0</version><!-- {x-version-update:google-cloud-dialogflow:current} -->
+    <version>4.9.1</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 3b6656107..7e907c71d 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>4.9.0</version><!-- {x-version-update:grpc-google-cloud-dialogflow-v2:current} -->
+  <version>4.9.1</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>4.9.0</version><!-- {x-version-update:google-cloud-dialogflow:current} -->
+    <version>4.9.1</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 f75f5b2d7..e21ee014f 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>0.107.0</version><!-- {x-version-update:grpc-google-cloud-dialogflow-v2beta1:current} -->
+  <version>0.107.1</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>4.9.0</version><!-- {x-version-update:google-cloud-dialogflow:current} -->
+    <version>4.9.1</version><!-- {x-version-update:google-cloud-dialogflow:current} -->
   </parent>
   <dependencies>
     <dependency>
diff --git a/pom.xml b/pom.xml
index 3a067b4ac..c9d60e3c2 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>4.9.0</version><!-- {x-version-update:google-cloud-dialogflow:current} -->
+  <version>4.9.1</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>
@@ -61,27 +61,27 @@
       <dependency>
         <groupId>com.google.api.grpc</groupId>
         <artifactId>proto-google-cloud-dialogflow-v2</artifactId>
-        <version>4.9.0</version><!-- {x-version-update:proto-google-cloud-dialogflow-v2:current} -->
+        <version>4.9.1</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>0.107.0</version><!-- {x-version-update:proto-google-cloud-dialogflow-v2beta1:current} -->
+        <version>0.107.1</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>0.107.0</version><!-- {x-version-update:grpc-google-cloud-dialogflow-v2beta1:current} -->
+        <version>0.107.1</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>4.9.0</version><!-- {x-version-update:grpc-google-cloud-dialogflow-v2:current} -->
+        <version>4.9.1</version><!-- {x-version-update:grpc-google-cloud-dialogflow-v2:current} -->
       </dependency>
       <dependency>
         <groupId>com.google.cloud</groupId>
         <artifactId>google-cloud-dialogflow</artifactId>
-        <version>4.9.0</version><!-- {x-version-update:google-cloud-dialogflow:current} -->
+        <version>4.9.1</version><!-- {x-version-update:google-cloud-dialogflow:current} -->
       </dependency>
       <dependency>
         <groupId>com.google.cloud</groupId>
diff --git a/proto-google-cloud-dialogflow-v2/pom.xml b/proto-google-cloud-dialogflow-v2/pom.xml
index 369c32941..a5abd88a2 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>4.9.0</version><!-- {x-version-update:proto-google-cloud-dialogflow-v2:current} -->
+  <version>4.9.1</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>4.9.0</version><!-- {x-version-update:google-cloud-dialogflow:current} -->
+    <version>4.9.1</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 261c57d46..9ff4ea825 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>0.107.0</version><!-- {x-version-update:proto-google-cloud-dialogflow-v2beta1:current} -->
+  <version>0.107.1</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>4.9.0</version><!-- {x-version-update:google-cloud-dialogflow:current} -->
+    <version>4.9.1</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 c6fce367a..621d8dce3 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>4.8.6</version>
+      <version>4.9.0</version>
     </dependency>
     <!-- [END dialogflow_install_without_bom] -->
 
     <dependency>
       <groupId>com.google.cloud</groupId>
       <artifactId>google-cloud-core</artifactId>
-      <version>2.8.19</version>
+      <version>2.8.20</version>
       <scope>test</scope>
       <classifier>tests</classifier>
     </dependency>
diff --git a/samples/snapshot/pom.xml b/samples/snapshot/pom.xml
index 110aad67a..f743e818e 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>4.8.6</version>
+      <version>4.9.0</version>
     </dependency>
 
     <dependency>
       <groupId>com.google.cloud</groupId>
       <artifactId>google-cloud-core</artifactId>
-      <version>2.8.19</version>
+      <version>2.8.20</version>
       <scope>test</scope>
       <classifier>tests</classifier>
     </dependency>
diff --git a/samples/snippets/pom.xml b/samples/snippets/pom.xml
index bdd68afd2..fbab5837a 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>26.1.2</version>
+        <version>26.1.3</version>
         <type>pom</type>
         <scope>import</scope>
       </dependency>
@@ -47,7 +47,7 @@
     <dependency>
       <groupId>com.google.cloud</groupId>
       <artifactId>google-cloud-core</artifactId>
-      <version>2.8.19</version>
+      <version>2.8.20</version>
       <scope>test</scope>
       <classifier>tests</classifier>
     </dependency>
diff --git a/versions.txt b/versions.txt
index 4e6a208e7..308ec47fe 100644
--- a/versions.txt
+++ b/versions.txt
@@ -1,8 +1,8 @@
 # Format:
 # module:released-version:current-version
 
-google-cloud-dialogflow:4.9.0:4.9.0
-grpc-google-cloud-dialogflow-v2beta1:0.107.0:0.107.0
-grpc-google-cloud-dialogflow-v2:4.9.0:4.9.0
-proto-google-cloud-dialogflow-v2:4.9.0:4.9.0
-proto-google-cloud-dialogflow-v2beta1:0.107.0:0.107.0
+google-cloud-dialogflow:4.9.1:4.9.1
+grpc-google-cloud-dialogflow-v2beta1:0.107.1:0.107.1
+grpc-google-cloud-dialogflow-v2:4.9.1:4.9.1
+proto-google-cloud-dialogflow-v2:4.9.1:4.9.1
+proto-google-cloud-dialogflow-v2beta1:0.107.1:0.107.1