diff --git a/google-oauth-client-assembly/README.md b/google-oauth-client-assembly/README.md
index 5d49d3511..160f07760 100644
--- a/google-oauth-client-assembly/README.md
+++ b/google-oauth-client-assembly/README.md
@@ -27,7 +27,6 @@ The dependency structure and licenses for the different libraries can be found h
 * [google-http-client](dependencies/google-http-client-dependencies.html)
 * [google-http-client-android](dependencies/google-http-client-android-dependencies.html)
 * [google-http-client-appengine](dependencies/google-http-client-appengine-dependencies.html)
-* [google-http-client-protobuf](dependencies/google-http-client-protobuf-dependencies.html)
 * [google-http-client-gson](dependencies/google-http-client-gson-dependencies.html)
 * [google-http-client-jackson](dependencies/google-http-client-jackson-dependencies.html)
 * [google-http-client-jackson2](dependencies/google-http-client-jackson2-dependencies.html)
@@ -59,8 +58,6 @@ The following are the jars from the [libs](libs) folder needed for applications
 * google-oauth-client-${project.version}.jar
 * google-http-client-${project.http.version}.jar
 * jsr305-${project.jsr305.version}.jar
-* google-http-client-protobuf-${project.http.version}.jar (when using protobuf-java)
-  * protobuf-java-${project.protobuf-java.version}.jar
 * google-http-client-gson-${project.http.version}.jar (when using GSON)
   * gson-${project.gson.version}.jar
 * google-http-client-jackson-${project.http.version}.jar (when using Jackson)
diff --git a/google-oauth-client-assembly/assembly.xml b/google-oauth-client-assembly/assembly.xml
index 5d50532ad..296fd7123 100644
--- a/google-oauth-client-assembly/assembly.xml
+++ b/google-oauth-client-assembly/assembly.xml
@@ -56,12 +56,6 @@
       <outputDirectory>google-oauth-java-client/libs</outputDirectory>
       <filtered>true</filtered>
     </file>
-    <file>
-      <source>properties/google-http-client-protobuf.jar.properties</source>
-      <destName>google-http-client-protobuf-${project.http.version}.jar.properties</destName>
-      <outputDirectory>google-oauth-java-client/libs</outputDirectory>
-      <filtered>true</filtered>
-    </file>
     <file>
       <source>properties/google-http-client-xml.jar.properties</source>
       <destName>google-http-client-xml-${project.http.version}.jar.properties</destName>
@@ -80,12 +74,6 @@
       <outputDirectory>google-oauth-java-client/libs</outputDirectory>
       <filtered>true</filtered>
     </file>
-    <file>
-      <source>properties/protobuf-java.jar.properties</source>
-      <destName>protobuf-java-${project.protobuf-java.version}.jar.properties</destName>
-      <outputDirectory>google-oauth-java-client/libs</outputDirectory>
-      <filtered>true</filtered>
-    </file>
     <!-- dependencies.html files -->
     <file>
       <source>../google-oauth-client/target/site/dependencies.html</source>
diff --git a/google-oauth-client-assembly/classpath-include b/google-oauth-client-assembly/classpath-include
index e7663a426..28230e9d3 100644
--- a/google-oauth-client-assembly/classpath-include
+++ b/google-oauth-client-assembly/classpath-include
@@ -20,6 +20,5 @@
 	<classpathentry kind="lib" path="libs/jackson-core-${project.jackson-core2.version}.jar" sourcepath="libs-sources/jackson-core-${project.jackson-core2.version}-sources.jar"/>
 	<classpathentry kind="lib" path="libs/jdo2-api-${project.jdo2-api.version}.jar" sourcepath="libs-sources/jdo2-api-${project.jdo2-api.version}-sources.jar"/>
 	<classpathentry kind="lib" path="libs/jsr305-${project.jsr305.version}.jar"/>
-	<classpathentry kind="lib" path="libs/protobuf-java-${project.protobuf-java.version}.jar" sourcepath="libs-sources/protobuf-java-${project.protobuf-java.version}-sources.jar"/>
 	<classpathentry kind="lib" path="libs/transaction-api-${project.transaction-api.version}.jar" sourcepath="libs-sources/transaction-api-${project.transaction-api.version}-sources.jar"/>
 	<classpathentry kind="lib" path="libs/xpp3-${project.xpp3.version}.jar" sourcepath="libs-sources/xpp3-${project.xpp3.version}-sources.jar"/>
diff --git a/google-oauth-client-assembly/properties/google-http-client-protobuf.jar.properties b/google-oauth-client-assembly/properties/google-http-client-protobuf.jar.properties
deleted file mode 100644
index 688c6ece9..000000000
--- a/google-oauth-client-assembly/properties/google-http-client-protobuf.jar.properties
+++ /dev/null
@@ -1 +0,0 @@
-src=../libs-sources/google-http-client-protobuf-${project.http.version}-sources.jar
diff --git a/google-oauth-client-assembly/properties/protobuf-java.jar.properties b/google-oauth-client-assembly/properties/protobuf-java.jar.properties
deleted file mode 100644
index 3f734a010..000000000
--- a/google-oauth-client-assembly/properties/protobuf-java.jar.properties
+++ /dev/null
@@ -1 +0,0 @@
-src=../libs-sources/protobuf-java-${project.protobuf-java.version}-sources.jar
diff --git a/pom.xml b/pom.xml
index 346aae590..d12271123 100644
--- a/pom.xml
+++ b/pom.xml
@@ -450,7 +450,6 @@
     <project.jackson-core-asl.version>1.9.13</project.jackson-core-asl.version>
     <project.jackson-core2.version>2.9.6</project.jackson-core2.version>
     <project.jetty.version>8.2.0.v20160908</project.jetty.version>
-    <project.protobuf-java.version>2.6.1</project.protobuf-java.version>
     <project.guava.version>28.1-android</project.guava.version>
     <project.xpp3.version>1.1.4c</project.xpp3.version>
     <project.commons-logging.version>1.1.1</project.commons-logging.version>