diff --git a/.github/readme/synth.metadata/synth.metadata b/.github/readme/synth.metadata/synth.metadata
index 7bd8b41c..f9c93e4e 100644
--- a/.github/readme/synth.metadata/synth.metadata
+++ b/.github/readme/synth.metadata/synth.metadata
@@ -4,14 +4,14 @@
       "git": {
         "name": ".",
         "remote": "https://github.com/googleapis/java-iamcredentials.git",
-        "sha": "af4157904ed08555a286f57011b11efc0aeac8a0"
+        "sha": "0f74824728b05915a57301db135148deaea5b1ba"
       }
     },
     {
       "git": {
         "name": "synthtool",
         "remote": "https://github.com/googleapis/synthtool.git",
-        "sha": "4679e7e415221f03ff2a71e3ffad75b9ec41d87e"
+        "sha": "0199c79b8324fba66476300824aa931788c47e2d"
       }
     }
   ]
diff --git a/CHANGELOG.md b/CHANGELOG.md
index bb1bfe9b..37512b3b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,12 @@
 # Changelog
 
+### [1.2.1](https://www.github.com/googleapis/java-iamcredentials/compare/v1.2.0...v1.2.1) (2021-02-25)
+
+
+### Dependencies
+
+* update dependency com.google.cloud:google-cloud-shared-dependencies to v0.20.0 ([#369](https://www.github.com/googleapis/java-iamcredentials/issues/369)) ([8309f85](https://www.github.com/googleapis/java-iamcredentials/commit/8309f855c1feb6a97d0e62db86788536722a09f9))
+
 ## [1.2.0](https://www.github.com/googleapis/java-iamcredentials/compare/v1.1.9...v1.2.0) (2021-02-22)
 
 
diff --git a/README.md b/README.md
index 7bd4c454..efc30676 100644
--- a/README.md
+++ b/README.md
@@ -17,7 +17,7 @@ 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>16.3.0</version>
+      <version>18.0.0</version>
       <type>pom</type>
       <scope>import</scope>
     </dependency>
@@ -38,25 +38,25 @@ If you are using Maven without BOM, add this to your dependencies:
 <dependency>
   <groupId>com.google.cloud</groupId>
   <artifactId>google-cloud-iamcredentials</artifactId>
-  <version>1.1.9</version>
+  <version>1.2.0</version>
 </dependency>
 
 ```
 
 If you are using Gradle 5.x or later, add this to your dependencies
 ```Groovy
-implementation platform('com.google.cloud:libraries-bom:16.4.0')
+implementation platform('com.google.cloud:libraries-bom:18.0.0')
 
 compile 'com.google.cloud:google-cloud-iamcredentials'
 ```
 If you are using Gradle without BOM, add this to your dependencies
 ```Groovy
-compile 'com.google.cloud:google-cloud-iamcredentials:1.1.9'
+compile 'com.google.cloud:google-cloud-iamcredentials:1.2.0'
 ```
 
 If you are using SBT, add this to your dependencies
 ```Scala
-libraryDependencies += "com.google.cloud" % "google-cloud-iamcredentials" % "1.1.9"
+libraryDependencies += "com.google.cloud" % "google-cloud-iamcredentials" % "1.2.0"
 ```
 
 ## Authentication
diff --git a/google-cloud-iamcredentials-bom/pom.xml b/google-cloud-iamcredentials-bom/pom.xml
index 9fc44862..58312c51 100644
--- a/google-cloud-iamcredentials-bom/pom.xml
+++ b/google-cloud-iamcredentials-bom/pom.xml
@@ -3,12 +3,12 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>com.google.cloud</groupId>
   <artifactId>google-cloud-iamcredentials-bom</artifactId>
-  <version>1.2.0</version><!-- {x-version-update:google-cloud-iamcredentials:current} -->
+  <version>1.2.1</version><!-- {x-version-update:google-cloud-iamcredentials:current} -->
   <packaging>pom</packaging>
   <parent>
     <groupId>com.google.cloud</groupId>
     <artifactId>google-cloud-shared-config</artifactId>
-    <version>0.10.0</version>
+    <version>0.11.0</version>
   </parent>
 
   <name>Google Cloud iamcredentials BOM</name>
@@ -64,17 +64,17 @@
       <dependency>
         <groupId>com.google.cloud</groupId>
         <artifactId>google-cloud-iamcredentials</artifactId>
-        <version>1.2.0</version><!-- {x-version-update:google-cloud-iamcredentials:current} -->
+        <version>1.2.1</version><!-- {x-version-update:google-cloud-iamcredentials:current} -->
       </dependency>
       <dependency>
         <groupId>com.google.api.grpc</groupId>
         <artifactId>grpc-google-cloud-iamcredentials-v1</artifactId>
-        <version>1.2.0</version><!-- {x-version-update:grpc-google-cloud-iamcredentials-v1:current} -->
+        <version>1.2.1</version><!-- {x-version-update:grpc-google-cloud-iamcredentials-v1:current} -->
       </dependency>
       <dependency>
         <groupId>com.google.api.grpc</groupId>
         <artifactId>proto-google-cloud-iamcredentials-v1</artifactId>
-        <version>1.2.0</version><!-- {x-version-update:proto-google-cloud-iamcredentials-v1:current} -->
+        <version>1.2.1</version><!-- {x-version-update:proto-google-cloud-iamcredentials-v1:current} -->
       </dependency>
     </dependencies>
   </dependencyManagement>
diff --git a/google-cloud-iamcredentials/pom.xml b/google-cloud-iamcredentials/pom.xml
index 62dabb23..f9144e0d 100644
--- a/google-cloud-iamcredentials/pom.xml
+++ b/google-cloud-iamcredentials/pom.xml
@@ -3,7 +3,7 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>com.google.cloud</groupId>
   <artifactId>google-cloud-iamcredentials</artifactId>
-  <version>1.2.0</version><!-- {x-version-update:google-cloud-iamcredentials:current} -->
+  <version>1.2.1</version><!-- {x-version-update:google-cloud-iamcredentials:current} -->
   <packaging>jar</packaging>
   <name>Google Cloud IAM Service Account Credentials</name>
   <url>https://github.com/googleapis/java-iamcredentials</url>
@@ -11,7 +11,7 @@
   <parent>
     <groupId>com.google.cloud</groupId>
     <artifactId>google-cloud-iamcredentials-parent</artifactId>
-    <version>1.2.0</version><!-- {x-version-update:google-cloud-iamcredentials:current} -->
+    <version>1.2.1</version><!-- {x-version-update:google-cloud-iamcredentials:current} -->
   </parent>
   <properties>
     <site.installationModule>google-cloud-iamcredentials</site.installationModule>
diff --git a/grpc-google-cloud-iamcredentials-v1/pom.xml b/grpc-google-cloud-iamcredentials-v1/pom.xml
index 8f65d2df..800a3f57 100644
--- a/grpc-google-cloud-iamcredentials-v1/pom.xml
+++ b/grpc-google-cloud-iamcredentials-v1/pom.xml
@@ -4,13 +4,13 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>com.google.api.grpc</groupId>
   <artifactId>grpc-google-cloud-iamcredentials-v1</artifactId>
-  <version>1.2.0</version><!-- {x-version-update:grpc-google-cloud-iamcredentials-v1:current} -->
+  <version>1.2.1</version><!-- {x-version-update:grpc-google-cloud-iamcredentials-v1:current} -->
   <name>grpc-google-cloud-iamcredentials-v1</name>
   <description>GRPC library for grpc-google-cloud-iamcredentials-v1</description>
   <parent>
     <groupId>com.google.cloud</groupId>
     <artifactId>google-cloud-iamcredentials-parent</artifactId>
-    <version>1.2.0</version><!-- {x-version-update:google-cloud-iamcredentials:current} -->
+    <version>1.2.1</version><!-- {x-version-update:google-cloud-iamcredentials:current} -->
   </parent>
   <dependencies>
     <dependency>
diff --git a/pom.xml b/pom.xml
index 26e681a6..ddfe5dde 100644
--- a/pom.xml
+++ b/pom.xml
@@ -4,7 +4,7 @@
   <groupId>com.google.cloud</groupId>
   <artifactId>google-cloud-iamcredentials-parent</artifactId>
   <packaging>pom</packaging>
-  <version>1.2.0</version><!-- {x-version-update:google-cloud-iamcredentials:current} -->
+  <version>1.2.1</version><!-- {x-version-update:google-cloud-iamcredentials:current} -->
   <name>Google Cloud IAM Service Account Credentials Parent</name>
   <url>https://github.com/googleapis/java-iamcredentials</url>
   <description>
@@ -14,7 +14,7 @@
   <parent>
     <groupId>com.google.cloud</groupId>
     <artifactId>google-cloud-shared-config</artifactId>
-    <version>0.10.0</version>
+    <version>0.11.0</version>
   </parent>
 
   <developers>
@@ -70,23 +70,23 @@
       <dependency>
         <groupId>com.google.api.grpc</groupId>
         <artifactId>proto-google-cloud-iamcredentials-v1</artifactId>
-        <version>1.2.0</version><!-- {x-version-update:proto-google-cloud-iamcredentials-v1:current} -->
+        <version>1.2.1</version><!-- {x-version-update:proto-google-cloud-iamcredentials-v1:current} -->
       </dependency>
       <dependency>
         <groupId>com.google.api.grpc</groupId>
         <artifactId>grpc-google-cloud-iamcredentials-v1</artifactId>
-        <version>1.2.0</version><!-- {x-version-update:grpc-google-cloud-iamcredentials-v1:current} -->
+        <version>1.2.1</version><!-- {x-version-update:grpc-google-cloud-iamcredentials-v1:current} -->
       </dependency>
       <dependency>
         <groupId>com.google.cloud</groupId>
         <artifactId>google-cloud-iamcredentials</artifactId>
-        <version>1.2.0</version><!-- {x-version-update:google-cloud-iamcredentials:current} -->
+        <version>1.2.1</version><!-- {x-version-update:google-cloud-iamcredentials:current} -->
       </dependency>
 
       <dependency>
         <groupId>com.google.cloud</groupId>
         <artifactId>google-cloud-shared-dependencies</artifactId>
-        <version>0.19.0</version>
+        <version>0.20.0</version>
         <type>pom</type>
         <scope>import</scope>
       </dependency>
diff --git a/proto-google-cloud-iamcredentials-v1/pom.xml b/proto-google-cloud-iamcredentials-v1/pom.xml
index 9772dd6d..7fa476cc 100644
--- a/proto-google-cloud-iamcredentials-v1/pom.xml
+++ b/proto-google-cloud-iamcredentials-v1/pom.xml
@@ -4,13 +4,13 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>com.google.api.grpc</groupId>
   <artifactId>proto-google-cloud-iamcredentials-v1</artifactId>
-  <version>1.2.0</version><!-- {x-version-update:proto-google-cloud-iamcredentials-v1:current} -->
+  <version>1.2.1</version><!-- {x-version-update:proto-google-cloud-iamcredentials-v1:current} -->
   <name>proto-google-cloud-iamcredentials-v1</name>
   <description>PROTO library for proto-google-cloud-iamcredentials-v1</description>
   <parent>
     <groupId>com.google.cloud</groupId>
     <artifactId>google-cloud-iamcredentials-parent</artifactId>
-    <version>1.2.0</version><!-- {x-version-update:google-cloud-iamcredentials:current} -->
+    <version>1.2.1</version><!-- {x-version-update:google-cloud-iamcredentials:current} -->
   </parent>
   <dependencies>
     <dependency>
diff --git a/samples/install-without-bom/pom.xml b/samples/install-without-bom/pom.xml
index d1ce62d9..aac02577 100644
--- a/samples/install-without-bom/pom.xml
+++ b/samples/install-without-bom/pom.xml
@@ -29,7 +29,7 @@
     <dependency>
       <groupId>com.google.cloud</groupId>
       <artifactId>google-cloud-iamcredentials</artifactId>
-      <version>1.1.9</version>
+      <version>1.2.0</version>
     </dependency>
     <!-- [END iamcredentials_install_without_bom] -->
 
diff --git a/samples/snapshot/pom.xml b/samples/snapshot/pom.xml
index 751a6a0e..9313dc90 100644
--- a/samples/snapshot/pom.xml
+++ b/samples/snapshot/pom.xml
@@ -28,7 +28,7 @@
     <dependency>
       <groupId>com.google.cloud</groupId>
       <artifactId>google-cloud-iamcredentials</artifactId>
-      <version>1.1.9</version>
+      <version>1.2.0</version>
     </dependency>
 
     <dependency>
diff --git a/samples/snippets/pom.xml b/samples/snippets/pom.xml
index 2bc43049..53793ecf 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>16.3.0</version>
+        <version>18.0.0</version>
         <type>pom</type>
         <scope>import</scope>
       </dependency>
diff --git a/versions.txt b/versions.txt
index 041b6c0d..0027040f 100644
--- a/versions.txt
+++ b/versions.txt
@@ -1,6 +1,6 @@
 # Format:
 # module:released-version:current-version
 
-proto-google-cloud-iamcredentials-v1:1.2.0:1.2.0
-grpc-google-cloud-iamcredentials-v1:1.2.0:1.2.0
-google-cloud-iamcredentials:1.2.0:1.2.0
+proto-google-cloud-iamcredentials-v1:1.2.1:1.2.1
+grpc-google-cloud-iamcredentials-v1:1.2.1:1.2.1
+google-cloud-iamcredentials:1.2.1:1.2.1