diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6973dff6..cb8135b4 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,12 @@
 # Changelog
 
+## [1.6.4](https://github.com/googleapis/java-iam/compare/v1.6.3...v1.6.4) (2022-10-10)
+
+
+### Dependencies
+
+* Update dependency com.google.cloud:google-iam-policy to v1.6.3 ([#472](https://github.com/googleapis/java-iam/issues/472)) ([8f911be](https://github.com/googleapis/java-iam/commit/8f911bef57b66ab9dd092ed7912702c038e8565e))
+
 ## [1.6.3](https://github.com/googleapis/java-iam/compare/v1.6.2...v1.6.3) (2022-10-07)
 
 
diff --git a/google-iam-policy/pom.xml b/google-iam-policy/pom.xml
index 629df028..030040b2 100644
--- a/google-iam-policy/pom.xml
+++ b/google-iam-policy/pom.xml
@@ -3,7 +3,7 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>com.google.cloud</groupId>
   <artifactId>google-iam-policy</artifactId>
-  <version>1.6.3</version><!-- {x-version-update:google-iam-policy:current} -->
+  <version>1.6.4</version><!-- {x-version-update:google-iam-policy:current} -->
   <packaging>jar</packaging>
   <name>Google IAM Policy</name>
   <url>https://github.com/googleapis/java-eventarc</url>
@@ -11,7 +11,7 @@
   <parent>
     <groupId>com.google.cloud</groupId>
     <artifactId>google-iam-parent</artifactId>
-    <version>1.6.3</version><!-- {x-version-update:proto-google-iam-v1:current} -->
+    <version>1.6.4</version><!-- {x-version-update:proto-google-iam-v1:current} -->
   </parent>
   <properties>
     <site.installationModule>google-iam-policy</site.installationModule>
diff --git a/grpc-google-iam-v1/pom.xml b/grpc-google-iam-v1/pom.xml
index 43b5254b..5fc2b829 100644
--- a/grpc-google-iam-v1/pom.xml
+++ b/grpc-google-iam-v1/pom.xml
@@ -4,13 +4,13 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>com.google.api.grpc</groupId>
   <artifactId>grpc-google-iam-v1</artifactId>
-  <version>1.6.3</version><!-- {x-version-update:proto-google-iam-v1:current} -->
+  <version>1.6.4</version><!-- {x-version-update:proto-google-iam-v1:current} -->
   <name>grpc-google-iam-v1</name>
   <description>GRPC library for grpc-google-iam-v1</description>
   <parent>
     <groupId>com.google.cloud</groupId>
     <artifactId>google-iam-parent</artifactId>
-    <version>1.6.3</version><!-- {x-version-update:proto-google-iam-v1:current} -->
+    <version>1.6.4</version><!-- {x-version-update:proto-google-iam-v1:current} -->
   </parent>
   <dependencies>
     <dependency>
diff --git a/grpc-google-iam-v2/pom.xml b/grpc-google-iam-v2/pom.xml
index c78bd1c4..edb478ee 100644
--- a/grpc-google-iam-v2/pom.xml
+++ b/grpc-google-iam-v2/pom.xml
@@ -4,13 +4,13 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>com.google.api.grpc</groupId>
   <artifactId>grpc-google-iam-v2</artifactId>
-  <version>1.6.3</version><!-- {x-version-update:grpc-google-iam-v2:current} -->
+  <version>1.6.4</version><!-- {x-version-update:grpc-google-iam-v2:current} -->
   <name>grpc-google-iam-v2</name>
   <description>GRPC library for proto-google-iam-v2</description>
   <parent>
     <groupId>com.google.cloud</groupId>
     <artifactId>google-iam-parent</artifactId>
-    <version>1.6.3</version><!-- {x-version-update:proto-google-iam-v1:current} -->
+    <version>1.6.4</version><!-- {x-version-update:proto-google-iam-v1:current} -->
   </parent>
   <dependencies>
     <dependency>
diff --git a/grpc-google-iam-v2beta/pom.xml b/grpc-google-iam-v2beta/pom.xml
index b640ffcc..f7691d36 100644
--- a/grpc-google-iam-v2beta/pom.xml
+++ b/grpc-google-iam-v2beta/pom.xml
@@ -4,13 +4,13 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>com.google.api.grpc</groupId>
   <artifactId>grpc-google-iam-v2beta</artifactId>
-  <version>1.6.3</version><!-- {x-version-update:grpc-google-iam-v2beta:current} -->
+  <version>1.6.4</version><!-- {x-version-update:grpc-google-iam-v2beta:current} -->
   <name>grpc-google-iam-v2beta</name>
   <description>GRPC library for proto-google-iam-v1</description>
   <parent>
     <groupId>com.google.cloud</groupId>
     <artifactId>google-iam-parent</artifactId>
-    <version>1.6.3</version><!-- {x-version-update:proto-google-iam-v1:current} -->
+    <version>1.6.4</version><!-- {x-version-update:proto-google-iam-v1:current} -->
   </parent>
   <dependencies>
     <dependency>
diff --git a/pom.xml b/pom.xml
index 09aa166f..3ff630a9 100644
--- a/pom.xml
+++ b/pom.xml
@@ -4,7 +4,7 @@
   <groupId>com.google.cloud</groupId>
   <artifactId>google-iam-parent</artifactId>
   <packaging>pom</packaging>
-  <version>1.6.3</version><!-- {x-version-update:proto-google-iam-v1:current} -->
+  <version>1.6.4</version><!-- {x-version-update:proto-google-iam-v1:current} -->
   <name>Google IAM Parent</name>
   <url>https://github.com/googleapis/java-iam</url>
   <description>
@@ -87,37 +87,37 @@
       <dependency>
         <groupId>com.google.api.grpc</groupId>
         <artifactId>proto-google-iam-v2</artifactId>
-        <version>1.6.3</version><!-- {x-version-update:proto-google-iam-v2:current} -->
+        <version>1.6.4</version><!-- {x-version-update:proto-google-iam-v2:current} -->
       </dependency>
       <dependency>
         <groupId>com.google.api.grpc</groupId>
         <artifactId>grpc-google-iam-v2</artifactId>
-        <version>1.6.3</version><!-- {x-version-update:grpc-google-iam-v2:current} -->
+        <version>1.6.4</version><!-- {x-version-update:grpc-google-iam-v2:current} -->
       </dependency>
       <dependency>
         <groupId>com.google.cloud</groupId>
         <artifactId>google-iam-policy</artifactId>
-        <version>1.6.3</version><!-- {x-version-update:google-iam-policy:current} -->
+        <version>1.6.4</version><!-- {x-version-update:google-iam-policy:current} -->
       </dependency>
       <dependency>
         <groupId>com.google.api.grpc</groupId>
         <artifactId>proto-google-iam-v2beta</artifactId>
-        <version>1.6.3</version><!-- {x-version-update:proto-google-iam-v2beta:current} -->
+        <version>1.6.4</version><!-- {x-version-update:proto-google-iam-v2beta:current} -->
       </dependency>
       <dependency>
         <groupId>com.google.api.grpc</groupId>
         <artifactId>grpc-google-iam-v1</artifactId>
-        <version>1.6.3</version><!-- {x-version-update:grpc-google-iam-v1:current} -->
+        <version>1.6.4</version><!-- {x-version-update:grpc-google-iam-v1:current} -->
       </dependency>
       <dependency>
         <groupId>com.google.api.grpc</groupId>
         <artifactId>grpc-google-iam-v2beta</artifactId>
-        <version>1.6.3</version><!-- {x-version-update:grpc-google-iam-v2beta:current} -->
+        <version>1.6.4</version><!-- {x-version-update:grpc-google-iam-v2beta:current} -->
       </dependency>
       <dependency>
         <groupId>com.google.api.grpc</groupId>
         <artifactId>proto-google-iam-v1</artifactId>
-        <version>1.6.3</version><!-- {x-version-update:proto-google-iam-v1:current} -->
+        <version>1.6.4</version><!-- {x-version-update:proto-google-iam-v1:current} -->
       </dependency>
 
       <dependency>
diff --git a/proto-google-iam-v1/pom.xml b/proto-google-iam-v1/pom.xml
index e736a98c..9fc66e84 100644
--- a/proto-google-iam-v1/pom.xml
+++ b/proto-google-iam-v1/pom.xml
@@ -3,13 +3,13 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>com.google.api.grpc</groupId>
   <artifactId>proto-google-iam-v1</artifactId>
-  <version>1.6.3</version><!-- {x-version-update:proto-google-iam-v1:current} -->
+  <version>1.6.4</version><!-- {x-version-update:proto-google-iam-v1:current} -->
   <name>proto-google-iam-v1</name>
   <description>PROTO library for proto-google-iam-v1</description>
   <parent>
     <groupId>com.google.cloud</groupId>
     <artifactId>google-iam-parent</artifactId>
-    <version>1.6.3</version><!-- {x-version-update:proto-google-iam-v1:current} -->
+    <version>1.6.4</version><!-- {x-version-update:proto-google-iam-v1:current} -->
   </parent>
   <dependencies>
     <dependency>
diff --git a/proto-google-iam-v2/pom.xml b/proto-google-iam-v2/pom.xml
index 63d3527d..ce552afa 100644
--- a/proto-google-iam-v2/pom.xml
+++ b/proto-google-iam-v2/pom.xml
@@ -4,13 +4,13 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>com.google.api.grpc</groupId>
   <artifactId>proto-google-iam-v2</artifactId>
-  <version>1.6.3</version><!-- {x-version-update:proto-google-iam-v2:current} -->
+  <version>1.6.4</version><!-- {x-version-update:proto-google-iam-v2:current} -->
   <name>proto-google-iam-v2</name>
   <description>Proto library for proto-google-iam-v1</description>
   <parent>
     <groupId>com.google.cloud</groupId>
     <artifactId>google-iam-parent</artifactId>
-    <version>1.6.3</version><!-- {x-version-update:proto-google-iam-v1:current} -->
+    <version>1.6.4</version><!-- {x-version-update:proto-google-iam-v1:current} -->
   </parent>
   <dependencies>
     <dependency>
diff --git a/proto-google-iam-v2beta/pom.xml b/proto-google-iam-v2beta/pom.xml
index cca00d33..d2609f2a 100644
--- a/proto-google-iam-v2beta/pom.xml
+++ b/proto-google-iam-v2beta/pom.xml
@@ -4,13 +4,13 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>com.google.api.grpc</groupId>
   <artifactId>proto-google-iam-v2beta</artifactId>
-  <version>1.6.3</version><!-- {x-version-update:proto-google-iam-v2beta:current} -->
+  <version>1.6.4</version><!-- {x-version-update:proto-google-iam-v2beta:current} -->
   <name>proto-google-iam-v2beta</name>
   <description>Proto library for proto-google-iam-v1</description>
   <parent>
     <groupId>com.google.cloud</groupId>
     <artifactId>google-iam-parent</artifactId>
-    <version>1.6.3</version><!-- {x-version-update:proto-google-iam-v1:current} -->
+    <version>1.6.4</version><!-- {x-version-update:proto-google-iam-v1:current} -->
   </parent>
   <dependencies>
     <dependency>
diff --git a/samples/cloud-client/snippets/pom.xml b/samples/cloud-client/snippets/pom.xml
index 92b86bba..0778c0c8 100644
--- a/samples/cloud-client/snippets/pom.xml
+++ b/samples/cloud-client/snippets/pom.xml
@@ -41,7 +41,7 @@
     <dependency>
       <groupId>com.google.cloud</groupId>
       <artifactId>google-iam-policy</artifactId>
-      <version>1.6.2</version>
+      <version>1.6.3</version>
       <scope>compile</scope>
     </dependency>
     <dependency>
diff --git a/versions.txt b/versions.txt
index 85e9350d..5372527b 100644
--- a/versions.txt
+++ b/versions.txt
@@ -1,10 +1,10 @@
 # Format:
 # module:released-version:current-version
 
-proto-google-iam-v1:1.6.3:1.6.3
-grpc-google-iam-v1:1.6.3:1.6.3
-proto-google-iam-v2beta:1.6.3:1.6.3
-grpc-google-iam-v2beta:1.6.3:1.6.3
-google-iam-policy:1.6.3:1.6.3
-proto-google-iam-v2:1.6.3:1.6.3
-grpc-google-iam-v2:1.6.3:1.6.3
+proto-google-iam-v1:1.6.4:1.6.4
+grpc-google-iam-v1:1.6.4:1.6.4
+proto-google-iam-v2beta:1.6.4:1.6.4
+grpc-google-iam-v2beta:1.6.4:1.6.4
+google-iam-policy:1.6.4:1.6.4
+proto-google-iam-v2:1.6.4:1.6.4
+grpc-google-iam-v2:1.6.4:1.6.4