diff --git a/CHANGELOG.md b/CHANGELOG.md
index 410ecb87d..8bf2600ed 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,13 @@
 # Changelog
 
+### [2.1.2](https://www.github.com/googleapis/api-common-java/compare/v2.1.1...v2.1.2) (2022-01-06)
+
+
+### Dependencies
+
+* update dependency com.google.auto.value:auto-value to v1.9 ([#323](https://www.github.com/googleapis/api-common-java/issues/323)) ([d8d7084](https://www.github.com/googleapis/api-common-java/commit/d8d708468f134ad0b39bfd8bccf8d7e08a19e7e1))
+* update dependency com.google.auto.value:auto-value-annotations to v1.9 ([#324](https://www.github.com/googleapis/api-common-java/issues/324)) ([0c920a4](https://www.github.com/googleapis/api-common-java/commit/0c920a4c5e68cc7b0a05297bf01114d4a231c591))
+
 ### [2.1.1](https://www.github.com/googleapis/api-common-java/compare/v2.1.0...v2.1.1) (2021-11-10)
 
 
diff --git a/build.gradle b/build.gradle
index d25359a92..15dfc7210 100644
--- a/build.gradle
+++ b/build.gradle
@@ -26,7 +26,7 @@ apply plugin: 'io.github.gradle-nexus.publish-plugin'
 group = "com.google.api"
 archivesBaseName = "api-common"
 
-project.version = "2.1.1" // {x-version-update:api-common:current}
+project.version = "2.1.2" // {x-version-update:api-common:current}
 
 sourceCompatibility = 1.8
 targetCompatibility = 1.8
@@ -42,8 +42,8 @@ ext {
   // Shortcuts for libraries we are using
   libraries = [
       javax_annotations: 'javax.annotation:javax.annotation-api:1.3.2',
-      auto_value: 'com.google.auto.value:auto-value:1.8.2',
-      auto_value_annotations: 'com.google.auto.value:auto-value-annotations:1.8.2',
+      auto_value: 'com.google.auto.value:auto-value:1.9',
+      auto_value_annotations: 'com.google.auto.value:auto-value-annotations:1.9',
       guava: 'com.google.guava:guava:31.0.1-jre',
       jsr305: 'com.google.code.findbugs:jsr305:3.0.2',
       error_prone_annotations: 'com.google.errorprone:error_prone_annotations:2.10.0',
@@ -353,7 +353,7 @@ task javadocCombinedV3(type: Javadoc) {
   options.addStringOption('encoding', 'UTF-8')
   options.addStringOption("doclet", "com.microsoft.doclet.DocFxDoclet")
   options.addStringOption("projectname", "api-common")
-  options.docletpath = [file(System.getenv('KOKORO_GFILE_DIR') + "/java-docfx-doclet-1.3.0.jar")]
+  options.docletpath = [file(System.getenv('KOKORO_GFILE_DIR') + "/java-docfx-doclet-1.4.0.jar")]
   // Newer Gradle 6 passes -notimestamp by default, which the doclet above doesn't understand:
   // https://github.com/gradle/gradle/issues/11898
   options.noTimestamp false
diff --git a/versions.txt b/versions.txt
index 8c4d855cb..410bce4f4 100644
--- a/versions.txt
+++ b/versions.txt
@@ -1,4 +1,4 @@
 # Format:
 # module:released-version:current-version
 
-api-common:2.1.1:2.1.1
+api-common:2.1.2:2.1.2