diff --git a/.gitignore b/.gitignore
index fadd6afc..069d08fc 100644
--- a/.gitignore
+++ b/.gitignore
@@ -13,3 +13,5 @@ target/
 # python utilities
 *.pyc
 __pycache__
+
+.flattened-pom.xml
diff --git a/google-cloud-websecurityscanner/pom.xml b/google-cloud-websecurityscanner/pom.xml
index 54c61760..1975074f 100644
--- a/google-cloud-websecurityscanner/pom.xml
+++ b/google-cloud-websecurityscanner/pom.xml
@@ -126,4 +126,13 @@
       </dependencies>
     </profile>
   </profiles>
+
+  <build>
+    <plugins>
+      <plugin>
+        <groupId>org.codehaus.mojo</groupId>
+        <artifactId>flatten-maven-plugin</artifactId>
+      </plugin>
+    </plugins>
+  </build>
 </project>
\ No newline at end of file
diff --git a/grpc-google-cloud-websecurityscanner-v1/pom.xml b/grpc-google-cloud-websecurityscanner-v1/pom.xml
index 80d493c7..46f2a206 100644
--- a/grpc-google-cloud-websecurityscanner-v1/pom.xml
+++ b/grpc-google-cloud-websecurityscanner-v1/pom.xml
@@ -53,4 +53,13 @@
       </dependencies>
     </profile>
   </profiles>
+
+  <build>
+    <plugins>
+      <plugin>
+        <groupId>org.codehaus.mojo</groupId>
+        <artifactId>flatten-maven-plugin</artifactId>
+      </plugin>
+    </plugins>
+  </build>
 </project>
\ No newline at end of file
diff --git a/grpc-google-cloud-websecurityscanner-v1alpha/pom.xml b/grpc-google-cloud-websecurityscanner-v1alpha/pom.xml
index dfddbb8c..6f308255 100644
--- a/grpc-google-cloud-websecurityscanner-v1alpha/pom.xml
+++ b/grpc-google-cloud-websecurityscanner-v1alpha/pom.xml
@@ -53,4 +53,13 @@
       </dependencies>
     </profile>
   </profiles>
+
+  <build>
+    <plugins>
+      <plugin>
+        <groupId>org.codehaus.mojo</groupId>
+        <artifactId>flatten-maven-plugin</artifactId>
+      </plugin>
+    </plugins>
+  </build>
 </project>
\ No newline at end of file
diff --git a/grpc-google-cloud-websecurityscanner-v1beta/pom.xml b/grpc-google-cloud-websecurityscanner-v1beta/pom.xml
index 625b8a90..4b2bb446 100644
--- a/grpc-google-cloud-websecurityscanner-v1beta/pom.xml
+++ b/grpc-google-cloud-websecurityscanner-v1beta/pom.xml
@@ -53,4 +53,13 @@
       </dependencies>
     </profile>
   </profiles>
+
+  <build>
+    <plugins>
+      <plugin>
+        <groupId>org.codehaus.mojo</groupId>
+        <artifactId>flatten-maven-plugin</artifactId>
+      </plugin>
+    </plugins>
+  </build>
 </project>
\ No newline at end of file
diff --git a/pom.xml b/pom.xml
index 452a9032..a16e2809 100644
--- a/pom.xml
+++ b/pom.xml
@@ -63,19 +63,6 @@
     <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
     <github.global.server>github</github.global.server>
     <site.installationModule>google-cloud-websecurityscanner-parent</site.installationModule>
-    <google.core.version>1.93.0</google.core.version>
-    <google.api-common.version>1.9.2</google.api-common.version>
-    <google.common-protos.version>1.18.0</google.common-protos.version>
-    <google.auth.version>0.20.0</google.auth.version>
-    <gax.version>1.57.0</gax.version>
-    <grpc.version>1.30.0</grpc.version>
-    <protobuf.version>3.12.2</protobuf.version>
-    <junit.version>4.13</junit.version>
-    <guava.version>29.0-android</guava.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>
-    <joda.version>2.10.6</joda.version>
   </properties>
 
   <dependencyManagement>
@@ -117,82 +104,23 @@
       </dependency>
 
       <dependency>
-        <groupId>com.google.auth</groupId>
-        <artifactId>google-auth-library-bom</artifactId>
-        <version>${google.auth.version}</version>
-        <type>pom</type>
-        <scope>import</scope>
-      </dependency>
-      <dependency>
-        <groupId>io.grpc</groupId>
-        <artifactId>grpc-bom</artifactId>
-        <version>${grpc.version}</version>
-        <type>pom</type>
-        <scope>import</scope>
-      </dependency>
-      <dependency>
-        <groupId>com.google.api</groupId>
-        <artifactId>gax-bom</artifactId>
-        <version>${gax.version}</version>
-        <type>pom</type>
-        <scope>import</scope>
-      </dependency>
-      <dependency>
-        <groupId>com.google.guava</groupId>
-        <artifactId>guava-bom</artifactId>
-        <version>${guava.version}</version>
+        <groupId>com.google.cloud</groupId>
+        <artifactId>google-cloud-shared-dependencies</artifactId>
+        <version>0.8.1</version>
         <type>pom</type>
         <scope>import</scope>
       </dependency>
 
-      <dependency>
-        <groupId>com.google.protobuf</groupId>
-        <artifactId>protobuf-java</artifactId>
-        <version>${protobuf.version}</version>
-      </dependency>
-      <dependency>
-        <groupId>com.google.api</groupId>
-        <artifactId>api-common</artifactId>
-        <version>${google.api-common.version}</version>
-      </dependency>
-      <dependency>
-        <groupId>com.google.api.grpc</groupId>
-        <artifactId>proto-google-common-protos</artifactId>
-        <version>${google.common-protos.version}</version>
-      </dependency>
-      <dependency>
-        <groupId>org.threeten</groupId>
-        <artifactId>threetenbp</artifactId>
-        <version>${threeten.version}</version>
-      </dependency>
-      <dependency>
-        <groupId>javax.annotation</groupId>
-        <artifactId>javax.annotation-api</artifactId>
-        <version>${javax.annotations.version}</version>
-      </dependency>
-      <dependency>
-        <groupId>org.codehaus.mojo</groupId>
-        <artifactId>animal-sniffer-annotations</artifactId>
-        <version>${animal-sniffer.version}</version>
-      </dependency>
-
       <dependency>
         <groupId>junit</groupId>
         <artifactId>junit</artifactId>
-        <version>${junit.version}</version>
+        <version>4.13</version>
         <scope>test</scope>
       </dependency>
       <dependency>
         <groupId>joda-time</groupId>
         <artifactId>joda-time</artifactId>
-        <version>${joda.version}</version>
-        <scope>test</scope>
-      </dependency>
-      <dependency>
-        <groupId>com.google.api</groupId>
-        <artifactId>gax-grpc</artifactId>
-        <version>${gax.version}</version>
-        <classifier>testlib</classifier>
+        <version>2.10.6</version>
         <scope>test</scope>
       </dependency>
     </dependencies>
@@ -286,7 +214,7 @@
             <link>https://developers.google.com/protocol-buffers/docs/reference/java/</link>
             <link>https://googleapis.dev/java/google-auth-library/latest/</link>
             <link>https://googleapis.dev/java/gax/latest/</link>
-            <link>https://googleapis.github.io/api-common-java/${google.api-common.version}/apidocs/</link>
+            <link>https://googleapis.github.io/api-common-java/</link>
           </links>
         </configuration>
       </plugin>
diff --git a/proto-google-cloud-websecurityscanner-v1/pom.xml b/proto-google-cloud-websecurityscanner-v1/pom.xml
index 808988a5..7d70abc3 100644
--- a/proto-google-cloud-websecurityscanner-v1/pom.xml
+++ b/proto-google-cloud-websecurityscanner-v1/pom.xml
@@ -30,4 +30,13 @@
       <artifactId>guava</artifactId>
     </dependency>
   </dependencies>
+
+  <build>
+    <plugins>
+      <plugin>
+        <groupId>org.codehaus.mojo</groupId>
+        <artifactId>flatten-maven-plugin</artifactId>
+      </plugin>
+    </plugins>
+  </build>
 </project>
\ No newline at end of file
diff --git a/proto-google-cloud-websecurityscanner-v1alpha/pom.xml b/proto-google-cloud-websecurityscanner-v1alpha/pom.xml
index 2467affe..f1d55c98 100644
--- a/proto-google-cloud-websecurityscanner-v1alpha/pom.xml
+++ b/proto-google-cloud-websecurityscanner-v1alpha/pom.xml
@@ -30,4 +30,13 @@
       <artifactId>guava</artifactId>
     </dependency>
   </dependencies>
+
+  <build>
+    <plugins>
+      <plugin>
+        <groupId>org.codehaus.mojo</groupId>
+        <artifactId>flatten-maven-plugin</artifactId>
+      </plugin>
+    </plugins>
+  </build>
 </project>
\ No newline at end of file
diff --git a/proto-google-cloud-websecurityscanner-v1beta/pom.xml b/proto-google-cloud-websecurityscanner-v1beta/pom.xml
index 56d84312..c0d8064f 100644
--- a/proto-google-cloud-websecurityscanner-v1beta/pom.xml
+++ b/proto-google-cloud-websecurityscanner-v1beta/pom.xml
@@ -30,4 +30,13 @@
       <artifactId>guava</artifactId>
     </dependency>
   </dependencies>
+
+  <build>
+    <plugins>
+      <plugin>
+        <groupId>org.codehaus.mojo</groupId>
+        <artifactId>flatten-maven-plugin</artifactId>
+      </plugin>
+    </plugins>
+  </build>
 </project>
\ No newline at end of file