diff --git a/pom.xml b/pom.xml
index 4045309b..cd72a3e6 100644
--- a/pom.xml
+++ b/pom.xml
@@ -65,10 +65,12 @@
     <google.auth.version>0.20.0</google.auth.version>
     <google.http-client.version>1.35.0</google.http-client.version>
     <google.api-client.version>1.30.9</google.api-client.version>
+    <gson.version>2.8.6</gson.version>
     <threeten.version>1.4.4</threeten.version>
     <javax.annotations.version>1.3.2</javax.annotations.version>
     <animal-sniffer.version>1.18</animal-sniffer.version>
     <iam.version>0.13.0</iam.version>
+    <grpc.iam.version>0.13.0</grpc.iam.version>
     <opencensus.version>0.24.0</opencensus.version>
     <findbugs.version>3.0.2</findbugs.version>
     <autovalue.version>1.7.2</autovalue.version>
@@ -123,6 +125,11 @@
         <artifactId>grpc-google-common-protos</artifactId>
         <version>${google.common-protos.version}</version>
       </dependency>
+      <dependency>
+        <groupId>com.google.code.gson</groupId>
+        <artifactId>gson</artifactId>
+        <version>${gson.version}</version>
+      </dependency>
       <dependency>
         <groupId>com.google.cloud</groupId>
         <artifactId>google-cloud-core-bom</artifactId>
@@ -266,6 +273,19 @@
         <version>${truth.version}</version>
         <scope>test</scope>
       </dependency>
+      <dependency>
+        <groupId>com.google.api.grpc</groupId>
+        <artifactId>grpc-google-iam-v1</artifactId>
+        <version>${grpc.iam.version}</version>
+        <scope>test</scope>
+      </dependency>
+      <dependency>
+        <groupId>com.google.cloud</groupId>
+        <artifactId>google-cloud-core</artifactId>
+        <version>${google.core.version}</version>
+        <type>test-jar</type>
+        <scope>test</scope>
+      </dependency>
     </dependencies>
   </dependencyManagement>
 </project>