diff --git a/.gitignore b/.gitignore
index 48ec8bf666..ccf024c145 100644
--- a/.gitignore
+++ b/.gitignore
@@ -28,3 +28,5 @@ docs/
 
 # Python utilities
 *.pyc
+
+.flattened-pom.xml
diff --git a/google-cloud-spanner/pom.xml b/google-cloud-spanner/pom.xml
index c0c3510391..ff76c61b3f 100644
--- a/google-cloud-spanner/pom.xml
+++ b/google-cloud-spanner/pom.xml
@@ -94,6 +94,11 @@
           </execution>
         </executions>
       </plugin>
+      <plugin>
+        <?m2e ignore?>
+        <groupId>org.codehaus.mojo</groupId>
+        <artifactId>flatten-maven-plugin</artifactId>
+      </plugin>
     </plugins>
     <pluginManagement>
       <plugins>
diff --git a/grpc-google-cloud-spanner-admin-database-v1/pom.xml b/grpc-google-cloud-spanner-admin-database-v1/pom.xml
index 5233798d6b..eee25be70c 100644
--- a/grpc-google-cloud-spanner-admin-database-v1/pom.xml
+++ b/grpc-google-cloud-spanner-admin-database-v1/pom.xml
@@ -61,4 +61,14 @@
       </dependencies>
     </profile>
   </profiles>
+
+  <build>
+    <plugins>
+      <plugin>
+        <?m2e ignore?>
+        <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-spanner-admin-instance-v1/pom.xml b/grpc-google-cloud-spanner-admin-instance-v1/pom.xml
index 9f7c7b2040..7cd460a958 100644
--- a/grpc-google-cloud-spanner-admin-instance-v1/pom.xml
+++ b/grpc-google-cloud-spanner-admin-instance-v1/pom.xml
@@ -61,4 +61,14 @@
       </dependencies>
     </profile>
   </profiles>
+
+  <build>
+    <plugins>
+      <plugin>
+        <?m2e ignore?>
+        <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-spanner-v1/pom.xml b/grpc-google-cloud-spanner-v1/pom.xml
index ec1a6c0749..784dbbcd9f 100644
--- a/grpc-google-cloud-spanner-v1/pom.xml
+++ b/grpc-google-cloud-spanner-v1/pom.xml
@@ -53,4 +53,14 @@
       </dependencies>
     </profile>
   </profiles>
+
+  <build>
+    <plugins>
+      <plugin>
+        <?m2e ignore?>
+        <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 3eec2a499a..3e53f9b484 100644
--- a/pom.xml
+++ b/pom.xml
@@ -63,18 +63,6 @@
     <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
     <github.global.server>github</github.global.server>
     <site.installationModule>google-cloud-spanner-parent</site.installationModule>
-    <google.core.version>1.93.4</google.core.version>
-    <google.api-common.version>1.9.0</google.api-common.version>
-    <google.common-protos.version>1.17.0</google.common-protos.version>
-    <gax.version>1.56.0</gax.version>
-    <grpc.version>1.29.0</grpc.version>
-    <protobuf.version>3.11.4</protobuf.version>
-    <junit.version>4.13</junit.version>
-    <guava.version>29.0-android</guava.version>
-    <threeten.version>1.4.3</threeten.version>
-    <javax.annotations.version>1.3.2</javax.annotations.version>
-    <animal-sniffer.version>1.18</animal-sniffer.version>
-    <opencensus.version>0.26.0</opencensus.version>
   </properties>
 
   <dependencyManagement>
@@ -115,121 +103,13 @@
         <version>1.53.0</version><!-- {x-version-update:google-cloud-spanner:current} -->
       </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>${guava.version}</version>
-        <type>pom</type>
-        <scope>import</scope>
-      </dependency>
       <dependency>
         <groupId>com.google.cloud</groupId>
-        <artifactId>google-cloud-core-bom</artifactId>
-        <version>${google.core.version}</version>
+        <artifactId>google-cloud-shared-dependencies</artifactId>
+        <version>0.2.0</version>
         <type>pom</type>
         <scope>import</scope>
       </dependency>
-      <dependency>
-        <groupId>com.google.auth</groupId>
-        <artifactId>google-auth-library-bom</artifactId>
-        <version>0.20.0</version>
-        <type>pom</type>
-        <scope>import</scope>
-      </dependency>
-      <dependency>
-        <groupId>com.google.protobuf</groupId>
-        <artifactId>protobuf-bom</artifactId>
-        <version>${protobuf.version}</version>
-        <type>pom</type>
-        <scope>import</scope>
-      </dependency>
-      <dependency>
-        <groupId>com.google.http-client</groupId>
-        <artifactId>google-http-client-bom</artifactId>
-        <version>1.34.2</version>
-        <type>pom</type>
-        <scope>import</scope>
-      </dependency>
-
-      <dependency>
-        <groupId>com.google.api</groupId>
-        <artifactId>api-common</artifactId>
-        <version>${google.api-common.version}</version>
-      </dependency>
-      <dependency>
-        <groupId>com.google.api.grpc</groupId>
-        <artifactId>proto-google-common-protos</artifactId>
-        <version>${google.common-protos.version}</version>
-      </dependency>
-      <dependency>
-        <groupId>com.google.api.grpc</groupId>
-        <artifactId>grpc-google-common-protos</artifactId>
-        <version>${google.common-protos.version}</version>
-      </dependency>
-      <dependency>
-        <groupId>com.google.api.grpc</groupId>
-        <artifactId>proto-google-iam-v1</artifactId>
-        <version>0.13.0</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>${animal-sniffer.version}</version>
-      </dependency>
-      <dependency>
-        <groupId>io.opencensus</groupId>
-        <artifactId>opencensus-api</artifactId>
-        <version>${opencensus.version}</version>
-      </dependency>
-      <dependency>
-        <groupId>io.opencensus</groupId>
-        <artifactId>opencensus-contrib-grpc-util</artifactId>
-        <version>${opencensus.version}</version>
-      </dependency>
-
-      <dependency>
-        <groupId>junit</groupId>
-        <artifactId>junit</artifactId>
-        <version>${junit.version}</version>
-        <scope>test</scope>
-      </dependency>
-      <dependency>
-        <groupId>com.google.api</groupId>
-        <artifactId>gax-grpc</artifactId>
-        <version>${gax.version}</version>
-        <classifier>testlib</classifier>
-        <scope>test</scope>
-      </dependency>
-      <dependency>
-        <groupId>com.google.truth</groupId>
-        <artifactId>truth</artifactId>
-        <version>1.0.1</version>
-        <scope>test</scope>
-      </dependency>
     </dependencies>
   </dependencyManagement>
 
@@ -307,7 +187,7 @@
             <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/1.8.1/apidocs/</link>
           </links>
         </configuration>
       </plugin>
diff --git a/proto-google-cloud-spanner-admin-database-v1/pom.xml b/proto-google-cloud-spanner-admin-database-v1/pom.xml
index 35feaa57cc..77eb238bf2 100644
--- a/proto-google-cloud-spanner-admin-database-v1/pom.xml
+++ b/proto-google-cloud-spanner-admin-database-v1/pom.xml
@@ -34,4 +34,14 @@
       <artifactId>proto-google-iam-v1</artifactId>
     </dependency>
   </dependencies>
+
+  <build>
+    <plugins>
+      <plugin>
+        <?m2e ignore?>
+        <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-spanner-admin-instance-v1/pom.xml b/proto-google-cloud-spanner-admin-instance-v1/pom.xml
index 126b1b5e3a..738ccd42c5 100644
--- a/proto-google-cloud-spanner-admin-instance-v1/pom.xml
+++ b/proto-google-cloud-spanner-admin-instance-v1/pom.xml
@@ -34,4 +34,14 @@
       <artifactId>proto-google-iam-v1</artifactId>
     </dependency>
   </dependencies>
+
+  <build>
+    <plugins>
+      <plugin>
+        <?m2e ignore?>
+        <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-spanner-v1/pom.xml b/proto-google-cloud-spanner-v1/pom.xml
index 8326a81ab6..8efb3a4677 100644
--- a/proto-google-cloud-spanner-v1/pom.xml
+++ b/proto-google-cloud-spanner-v1/pom.xml
@@ -30,4 +30,14 @@
       <artifactId>guava</artifactId>
     </dependency>
   </dependencies>
+
+  <build>
+    <plugins>
+      <plugin>
+        <?m2e ignore?>
+        <groupId>org.codehaus.mojo</groupId>
+        <artifactId>flatten-maven-plugin</artifactId>
+      </plugin>
+    </plugins>
+  </build>
 </project>
\ No newline at end of file