diff --git a/CHANGELOG.md b/CHANGELOG.md
index 85e60b3bc1..6bd3c6f169 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,12 @@
 # Changelog
 
+### [2.5.6](https://github.com/googleapis/java-core/compare/v2.5.5...v2.5.6) (2022-03-01)
+
+
+### Dependencies
+
+* update dependency com.google.api.grpc:proto-google-iam-v1 to v1.2.6 ([#742](https://github.com/googleapis/java-core/issues/742)) ([474e56c](https://github.com/googleapis/java-core/commit/474e56cca19f9d7b61f62585ee06f1fbdba0ae46))
+
 ### [2.5.5](https://github.com/googleapis/java-core/compare/v2.5.4...v2.5.5) (2022-02-28)
 
 
diff --git a/google-cloud-core-bom/pom.xml b/google-cloud-core-bom/pom.xml
index 8de131172d..d55e6b2e98 100644
--- a/google-cloud-core-bom/pom.xml
+++ b/google-cloud-core-bom/pom.xml
@@ -3,7 +3,7 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>com.google.cloud</groupId>
   <artifactId>google-cloud-core-bom</artifactId>
-  <version>2.5.5</version><!-- {x-version-update:google-cloud-core:current} -->
+  <version>2.5.6</version><!-- {x-version-update:google-cloud-core:current} -->
   <packaging>pom</packaging>
   <parent>
     <groupId>com.google.cloud</groupId>
@@ -63,22 +63,22 @@
       <dependency>
         <groupId>com.google.cloud</groupId>
         <artifactId>google-cloud-core</artifactId>
-        <version>2.5.5</version><!-- {x-version-update:google-cloud-core:current} -->
+        <version>2.5.6</version><!-- {x-version-update:google-cloud-core:current} -->
       </dependency>
       <dependency>
         <groupId>com.google.cloud</groupId>
         <artifactId>google-cloud-core-grpc</artifactId>
-        <version>2.5.5</version><!-- {x-version-update:google-cloud-core:current} -->
+        <version>2.5.6</version><!-- {x-version-update:google-cloud-core:current} -->
       </dependency>
       <dependency>
         <groupId>com.google.cloud</groupId>
         <artifactId>google-cloud-core-http</artifactId>
-        <version>2.5.5</version><!-- {x-version-update:google-cloud-core:current} -->
+        <version>2.5.6</version><!-- {x-version-update:google-cloud-core:current} -->
       </dependency>
       <dependency>
         <groupId>com.google.cloud</groupId>
         <artifactId>native-image-support</artifactId>
-        <version>0.12.5</version><!-- {x-version-update:native-image-support:current} -->
+        <version>0.12.6</version><!-- {x-version-update:native-image-support:current} -->
       </dependency>
     </dependencies>
   </dependencyManagement>
diff --git a/google-cloud-core-grpc/pom.xml b/google-cloud-core-grpc/pom.xml
index a9cf8ffa8b..f782d79247 100644
--- a/google-cloud-core-grpc/pom.xml
+++ b/google-cloud-core-grpc/pom.xml
@@ -3,7 +3,7 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>com.google.cloud</groupId>
   <artifactId>google-cloud-core-grpc</artifactId>
-  <version>2.5.5</version><!-- {x-version-update:google-cloud-core:current} -->
+  <version>2.5.6</version><!-- {x-version-update:google-cloud-core:current} -->
   <packaging>jar</packaging>
   <name>Google Cloud Core gRPC</name>
   <url>https://github.com/googleapis/java-core</url>
@@ -13,7 +13,7 @@
   <parent>
     <groupId>com.google.cloud</groupId>
     <artifactId>google-cloud-core-parent</artifactId>
-    <version>2.5.5</version><!-- {x-version-update:google-cloud-core:current} -->
+    <version>2.5.6</version><!-- {x-version-update:google-cloud-core:current} -->
   </parent>
   <properties>
     <site.installationModule>google-cloud-core-grpc</site.installationModule>
diff --git a/google-cloud-core-http/pom.xml b/google-cloud-core-http/pom.xml
index 3e061e282c..0059f0d9e2 100644
--- a/google-cloud-core-http/pom.xml
+++ b/google-cloud-core-http/pom.xml
@@ -3,7 +3,7 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>com.google.cloud</groupId>
   <artifactId>google-cloud-core-http</artifactId>
-  <version>2.5.5</version><!-- {x-version-update:google-cloud-core:current} -->
+  <version>2.5.6</version><!-- {x-version-update:google-cloud-core:current} -->
   <packaging>jar</packaging>
   <name>Google Cloud Core HTTP</name>
   <url>https://github.com/googleapis/java-core</url>
@@ -13,7 +13,7 @@
   <parent>
     <groupId>com.google.cloud</groupId>
     <artifactId>google-cloud-core-parent</artifactId>
-    <version>2.5.5</version><!-- {x-version-update:google-cloud-core:current} -->
+    <version>2.5.6</version><!-- {x-version-update:google-cloud-core:current} -->
   </parent>
   <properties>
     <site.installationModule>google-cloud-core-http</site.installationModule>
diff --git a/google-cloud-core/pom.xml b/google-cloud-core/pom.xml
index 58708c8caa..f3f6151358 100644
--- a/google-cloud-core/pom.xml
+++ b/google-cloud-core/pom.xml
@@ -3,7 +3,7 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>com.google.cloud</groupId>
   <artifactId>google-cloud-core</artifactId>
-  <version>2.5.5</version><!-- {x-version-update:google-cloud-core:current} -->
+  <version>2.5.6</version><!-- {x-version-update:google-cloud-core:current} -->
   <packaging>jar</packaging>
   <name>Google Cloud Core</name>
   <url>https://github.com/googleapis/java-core</url>
@@ -13,7 +13,7 @@
   <parent>
     <groupId>com.google.cloud</groupId>
     <artifactId>google-cloud-core-parent</artifactId>
-    <version>2.5.5</version><!-- {x-version-update:google-cloud-core:current} -->
+    <version>2.5.6</version><!-- {x-version-update:google-cloud-core:current} -->
   </parent>
   <properties>
     <site.installationModule>google-cloud-core</site.installationModule>
diff --git a/native-image-support/pom.xml b/native-image-support/pom.xml
index 98b19ac769..22b4501ffa 100644
--- a/native-image-support/pom.xml
+++ b/native-image-support/pom.xml
@@ -7,13 +7,13 @@
   <name>Google Cloud Native Image Support</name>
   <groupId>com.google.cloud</groupId>
   <artifactId>native-image-support</artifactId>
-  <version>0.12.5</version><!-- {x-version-update:native-image-support:current} -->
+  <version>0.12.6</version><!-- {x-version-update:native-image-support:current} -->
   <packaging>jar</packaging>
 
   <parent>
     <artifactId>google-cloud-core-parent</artifactId>
     <groupId>com.google.cloud</groupId>
-    <version>2.5.5</version> <!-- {x-version-update:google-cloud-core:current} -->
+    <version>2.5.6</version> <!-- {x-version-update:google-cloud-core:current} -->
   </parent>
 
   <description>
diff --git a/pom.xml b/pom.xml
index d561439163..9b78b8bf30 100644
--- a/pom.xml
+++ b/pom.xml
@@ -4,7 +4,7 @@
   <groupId>com.google.cloud</groupId>
   <artifactId>google-cloud-core-parent</artifactId>
   <packaging>pom</packaging>
-  <version>2.5.5</version><!-- {x-version-update:google-cloud-core:current} -->
+  <version>2.5.6</version><!-- {x-version-update:google-cloud-core:current} -->
   <name>Google Cloud Core Parent</name>
   <url>https://github.com/googleapis/java-core</url>
   <description>
@@ -154,7 +154,7 @@
     <gax.version>2.12.2</gax.version>
     <google.api-common.version>2.1.4</google.api-common.version>
     <google.common-protos.version>2.7.4</google.common-protos.version>
-    <google.iam.version>1.2.5</google.iam.version>
+    <google.iam.version>1.2.6</google.iam.version>
     <google.auth.version>1.5.3</google.auth.version>
     <google.api.version>1.33.2</google.api.version>
     <google.http.version>1.41.4</google.http.version>
diff --git a/versions.txt b/versions.txt
index 085bce8492..785157f1cb 100644
--- a/versions.txt
+++ b/versions.txt
@@ -1,5 +1,5 @@
 # Format:
 # module:released-version:current-version
 
-google-cloud-core:2.5.5:2.5.5
-native-image-support:0.12.5:0.12.5
\ No newline at end of file
+google-cloud-core:2.5.6:2.5.6
+native-image-support:0.12.6:0.12.6
\ No newline at end of file