diff --git a/packages/google-cloud-oslogin/protos/protos.d.ts b/packages/google-cloud-oslogin/protos/protos.d.ts
index 59dcfb608fdf..671805f7497e 100644
--- a/packages/google-cloud-oslogin/protos/protos.d.ts
+++ b/packages/google-cloud-oslogin/protos/protos.d.ts
@@ -13,7 +13,7 @@
 // limitations under the License.
 
 import * as Long from "long";
-import * as $protobuf from "protobufjs";
+import {protobuf as $protobuf} from "google-gax";
 /** Namespace google. */
 export namespace google {
 
diff --git a/packages/google-cloud-oslogin/protos/protos.js b/packages/google-cloud-oslogin/protos/protos.js
index b992cf3a606f..f778f9c142ad 100644
--- a/packages/google-cloud-oslogin/protos/protos.js
+++ b/packages/google-cloud-oslogin/protos/protos.js
@@ -19,7 +19,7 @@
         define(["protobufjs/minimal"], factory);
 
     /* CommonJS */ else if (typeof require === 'function' && typeof module === 'object' && module && module.exports)
-        module.exports = factory(require("protobufjs/minimal"));
+        module.exports = factory(require("google-gax").protobufMinimal);
 
 })(this, function($protobuf) {
     "use strict";
diff --git a/packages/google-cloud-oslogin/synth.metadata b/packages/google-cloud-oslogin/synth.metadata
index fc9144117e72..d3b5784ab83e 100644
--- a/packages/google-cloud-oslogin/synth.metadata
+++ b/packages/google-cloud-oslogin/synth.metadata
@@ -4,7 +4,7 @@
       "git": {
         "name": ".",
         "remote": "https://github.com/googleapis/nodejs-os-login.git",
-        "sha": "5a0debe0eb62fe182354f6af0114a5f833e2ee49"
+        "sha": "5e350922cdcf5df4f97361f1ec35dfb83f3f0d6e"
       }
     },
     {