diff --git a/gapic-generator-java-pom-parent/pom.xml b/gapic-generator-java-pom-parent/pom.xml
index a15c5db1cf..31eff573a9 100644
--- a/gapic-generator-java-pom-parent/pom.xml
+++ b/gapic-generator-java-pom-parent/pom.xml
@@ -28,7 +28,7 @@
         consistent across modules in this repository -->
     <javax.annotation-api.version>1.3.2</javax.annotation-api.version>
     <grpc.version>1.71.0</grpc.version>
-    <google.auth.version>1.39.1</google.auth.version>
+    <google.auth.version>1.40.0</google.auth.version>
     <google.http-client.version>2.0.2</google.http-client.version>
     <gson.version>2.12.1</gson.version>
     <guava.version>33.5.0-jre</guava.version>
diff --git a/gax-java/dependencies.properties b/gax-java/dependencies.properties
index e3ec9d13b5..5c7cc466bb 100644
--- a/gax-java/dependencies.properties
+++ b/gax-java/dependencies.properties
@@ -37,8 +37,8 @@ version.io_grpc=1.71.0
 #   2) Replace all characters which are neither alphabetic nor digits with the underscore ('_') character
 maven.com_google_api_grpc_proto_google_common_protos=com.google.api.grpc:proto-google-common-protos:2.61.1
 maven.com_google_api_grpc_grpc_google_common_protos=com.google.api.grpc:grpc-google-common-protos:2.61.1
-maven.com_google_auth_google_auth_library_oauth2_http=com.google.auth:google-auth-library-oauth2-http:1.39.1
-maven.com_google_auth_google_auth_library_credentials=com.google.auth:google-auth-library-credentials:1.39.1
+maven.com_google_auth_google_auth_library_oauth2_http=com.google.auth:google-auth-library-oauth2-http:1.40.0
+maven.com_google_auth_google_auth_library_credentials=com.google.auth:google-auth-library-credentials:1.40.0
 maven.io_opentelemetry_opentelemetry_api=io.opentelemetry:opentelemetry-api:1.47.0
 maven.io_opencensus_opencensus_api=io.opencensus:opencensus-api:0.31.1
 maven.io_opencensus_opencensus_contrib_grpc_metrics=io.opencensus:opencensus-contrib-grpc-metrics:0.31.1