diff --git a/gax-java/dependencies.properties b/gax-java/dependencies.properties
index c69108447e..e21d8880cb 100644
--- a/gax-java/dependencies.properties
+++ b/gax-java/dependencies.properties
@@ -64,7 +64,7 @@ maven.com_google_j2objc_j2objc_annotations=com.google.j2objc:j2objc-annotations:
 maven.com_google_auto_value_auto_value=com.google.auto.value:auto-value:1.10.1
 maven.com_google_auto_value_auto_value_annotations=com.google.auto.value:auto-value-annotations:1.10.1
 maven.com_google_api_api_common=com.google.api:api-common:2.6.2
-maven.org_threeten_threetenbp=org.threeten:threetenbp:1.6.5
+maven.org_threeten_threetenbp=org.threeten:threetenbp:1.6.6
 maven.com_google_api_grpc_grpc_google_iam_v1=com.google.api.grpc:grpc-google-iam-v1:1.9.2
 maven.com_google_api_grpc_proto_google_iam_v1=com.google.api.grpc:proto-google-iam-v1:1.9.2
 maven.com_google_http_client_google_http_client=com.google.http-client:google-http-client:1.43.1
diff --git a/gax-java/pom.xml b/gax-java/pom.xml
index 28a975bb0b..42736fc2d0 100644
--- a/gax-java/pom.xml
+++ b/gax-java/pom.xml
@@ -63,7 +63,7 @@
       <dependency>
         <groupId>org.threeten</groupId>
         <artifactId>threetenbp</artifactId>
-        <version>1.6.5</version>
+        <version>1.6.6</version>
       </dependency>
       <dependency>
         <groupId>com.google.code.findbugs</groupId>