diff --git a/.kokoro/release/common.cfg b/.kokoro/release/common.cfg
new file mode 100644
index 000000000..4377eeb04
--- /dev/null
+++ b/.kokoro/release/common.cfg
@@ -0,0 +1,56 @@
+# Format: //devtools/kokoro/config/proto/build.proto
+
+# Build logs will be here
+action {
+  define_artifacts {
+    regex: "**/*sponge_log.xml"
+  }
+}
+
+# Download trampoline resources.
+gfile_resources: "/bigstore/cloud-devrel-kokoro-resources/trampoline"
+
+# Use the trampoline script to run in docker.
+build_file: "google-http-java-client/.kokoro/trampoline.sh"
+
+# Configure the docker image for kokoro-trampoline.
+env_vars: {
+  key: "TRAMPOLINE_IMAGE"
+  value: "gcr.io/cloud-devrel-kokoro-resources/java8"
+}
+
+before_action {
+  fetch_keystore {
+    keystore_resource {
+      keystore_config_id: 70247
+      keyname: "maven-gpg-keyring"
+    }
+  }
+}
+
+before_action {
+  fetch_keystore {
+    keystore_resource {
+      keystore_config_id: 70247
+      keyname: "maven-gpg-passphrase"
+    }
+  }
+}
+
+before_action {
+  fetch_keystore {
+    keystore_resource {
+      keystore_config_id: 70247
+      keyname: "maven-gpg-pubkeyring"
+    }
+  }
+}
+
+before_action {
+  fetch_keystore {
+    keystore_resource {
+      keystore_config_id: 70247
+      keyname: "sonatype-credentials"
+    }
+  }
+}
diff --git a/.kokoro/release/common.sh b/.kokoro/release/common.sh
new file mode 100644
index 000000000..f7d538b3a
--- /dev/null
+++ b/.kokoro/release/common.sh
@@ -0,0 +1,50 @@
+#!/bin/bash
+# Copyright 2018 Google Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+set -eo pipefail
+
+# Get secrets from keystore and set and environment variables
+setup_environment_secrets() {
+  export GPG_PASSPHRASE=$(cat ${KOKORO_KEYSTORE_DIR}/70247_maven-gpg-passphrase)
+  export GPG_TTY=$(tty)
+  export GPG_HOMEDIR=/gpg
+  mkdir $GPG_HOMEDIR
+  mv ${KOKORO_KEYSTORE_DIR}/70247_maven-gpg-pubkeyring $GPG_HOMEDIR/pubring.gpg
+  mv ${KOKORO_KEYSTORE_DIR}/70247_maven-gpg-keyring $GPG_HOMEDIR/secring.gpg
+  export SONATYPE_USERNAME=$(cat ${KOKORO_KEYSTORE_DIR}/70247_sonatype-credentials | cut -f1 -d'|')
+  export SONATYPE_PASSWORD=$(cat ${KOKORO_KEYSTORE_DIR}/70247_sonatype-credentials | cut -f2 -d'|')
+}
+
+create_settings_xml_file() {
+  echo "<settings>
+  <servers>
+    <server>
+      <id>ossrh</id>
+      <username>${SONATYPE_USERNAME}</username>
+      <password>${SONATYPE_PASSWORD}</password>
+    </server>
+    <server>
+      <id>sonatype-nexus-staging</id>
+      <username>${SONATYPE_USERNAME}</username>
+      <password>${SONATYPE_PASSWORD}</password>
+    </server>
+    <server>
+      <id>sonatype-nexus-snapshots</id>
+      <username>${SONATYPE_USERNAME}</username>
+      <password>${SONATYPE_PASSWORD}</password>
+    </server>
+  </servers>
+</settings>" > $1
+}
diff --git a/.kokoro/release/drop.cfg b/.kokoro/release/drop.cfg
new file mode 100644
index 000000000..278e44d75
--- /dev/null
+++ b/.kokoro/release/drop.cfg
@@ -0,0 +1,7 @@
+# Format: //devtools/kokoro/config/proto/build.proto
+
+# Tell the trampoline which build file to use.
+env_vars: {
+    key: "TRAMPOLINE_BUILD_FILE"
+    value: "github/google-http-java-client/.kokoro/release/drop.sh"
+}
diff --git a/.kokoro/release/drop.sh b/.kokoro/release/drop.sh
new file mode 100755
index 000000000..abc381e5d
--- /dev/null
+++ b/.kokoro/release/drop.sh
@@ -0,0 +1,25 @@
+#!/bin/bash
+# Copyright 2018 Google Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+set -eo pipefail
+
+source $(dirname "$0")/common.sh
+
+pushd $(dirname "$0")/../../
+
+setup_environment_secrets
+create_settings_xml_file "settings.xml"
+
+mvn nexus-staging:drop --settings=settings.xml
diff --git a/.kokoro/release/promote.cfg b/.kokoro/release/promote.cfg
new file mode 100644
index 000000000..e6d8b8fdf
--- /dev/null
+++ b/.kokoro/release/promote.cfg
@@ -0,0 +1,7 @@
+# Format: //devtools/kokoro/config/proto/build.proto
+
+# Tell the trampoline which build file to use.
+env_vars: {
+    key: "TRAMPOLINE_BUILD_FILE"
+    value: "github/google-http-java-client/.kokoro/release/promote.sh"
+}
diff --git a/.kokoro/release/promote.sh b/.kokoro/release/promote.sh
new file mode 100755
index 000000000..439e0fc3e
--- /dev/null
+++ b/.kokoro/release/promote.sh
@@ -0,0 +1,25 @@
+#!/bin/bash
+# Copyright 2018 Google Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+set -eo pipefail
+
+source $(dirname "$0")/common.sh
+
+pushd $(dirname "$0")/../../
+
+setup_environment_secrets
+create_settings_xml_file "settings.xml"
+
+mvn nexus-staging:release -DperformRelease=true --settings=settings.xml
diff --git a/.kokoro/release/stage.cfg b/.kokoro/release/stage.cfg
new file mode 100644
index 000000000..c49930316
--- /dev/null
+++ b/.kokoro/release/stage.cfg
@@ -0,0 +1,7 @@
+# Format: //devtools/kokoro/config/proto/build.proto
+
+# Tell the trampoline which build file to use.
+env_vars: {
+    key: "TRAMPOLINE_BUILD_FILE"
+    value: "github/google-http-java-client/.kokoro/release/stage.sh"
+}
diff --git a/.kokoro/release/stage.sh b/.kokoro/release/stage.sh
new file mode 100755
index 000000000..02809c918
--- /dev/null
+++ b/.kokoro/release/stage.sh
@@ -0,0 +1,32 @@
+#!/bin/bash
+# Copyright 2018 Google Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+set -eo pipefail
+
+source $(dirname "$0")/common.sh
+
+pushd $(dirname "$0")/../../
+
+setup_environment_secrets
+create_settings_xml_file "settings.xml"
+
+mvn clean install deploy \
+  --settings settings.xml \
+  -DperformRelease=true \
+  -Dgpg.executable=gpg \
+  -Dgpg.passphrase=${GPG_PASSPHRASE} \
+  -Dgpg.homedir=${GPG_HOMEDIR}
+
+
diff --git a/google-http-client-android/pom.xml b/google-http-client-android/pom.xml
index 1fe20fca3..eaead49c1 100644
--- a/google-http-client-android/pom.xml
+++ b/google-http-client-android/pom.xml
@@ -16,7 +16,7 @@
         <artifactId>maven-javadoc-plugin</artifactId>
         <configuration>
           <links>
-            <link>http://download.oracle.com/javase/1.5.0/docs/api/</link>
+            <link>http://download.oracle.com/javase/6/docs/api/</link>
           </links>
           <doctitle>${project.name} ${project.version}</doctitle>
           <windowtitle>${project.artifactId} ${project.version}</windowtitle>
diff --git a/google-http-client-gson/pom.xml b/google-http-client-gson/pom.xml
index 429458339..6f1321a8a 100644
--- a/google-http-client-gson/pom.xml
+++ b/google-http-client-gson/pom.xml
@@ -16,8 +16,8 @@
         <artifactId>maven-javadoc-plugin</artifactId>
         <configuration>
           <links>
-            <link>http://download.oracle.com/javase/1.5.0/docs/api/</link>
-            <link>http://google-gson.googlecode.com/svn/trunk/gson/docs/javadocs</link>
+            <link>http://download.oracle.com/javase/6/docs/api/</link>
+            <link>https://www.javadoc.io/doc/com.google.code.gson/gson/${project.gson.version}</link>
           </links>
           <doctitle>${project.name} ${project.version}</doctitle>
           <windowtitle>${project.artifactId} ${project.version}</windowtitle>
diff --git a/google-http-client-jackson/pom.xml b/google-http-client-jackson/pom.xml
index 4cef10787..9d619fe87 100644
--- a/google-http-client-jackson/pom.xml
+++ b/google-http-client-jackson/pom.xml
@@ -16,8 +16,8 @@
         <artifactId>maven-javadoc-plugin</artifactId>
         <configuration>
           <links>
-            <link>https://download.oracle.com/javase/1.6.0/docs/api/</link>
-            <link>https://jar-download.com/artifacts/org.codehaus.jackson/jackson-core-asl/1.9.13/documentation</link>
+            <link>http://download.oracle.com/javase/6/docs/api/</link>
+            <link>https://jar-download.com/artifacts/org.codehaus.jackson/jackson-core-asl/${project.jackson-core-asl.version}/documentation</link>
           </links>
           <doctitle>${project.name} ${project.version}</doctitle>
           <windowtitle>${project.artifactId} ${project.version}</windowtitle>
diff --git a/google-http-client-jackson2/pom.xml b/google-http-client-jackson2/pom.xml
index 041986701..0df2b4fcd 100644
--- a/google-http-client-jackson2/pom.xml
+++ b/google-http-client-jackson2/pom.xml
@@ -16,8 +16,8 @@
         <artifactId>maven-javadoc-plugin</artifactId>
         <configuration>
           <links>
-            <link>http://download.oracle.com/javase/1.5.0/docs/api/</link>
-            <link>http://fasterxml.github.com/jackson-core/javadoc/2.0.5/</link>
+            <link>http://download.oracle.com/javase/6/docs/api/</link>
+            <link>http://fasterxml.github.com/jackson-core/javadoc/${project.jackson-core2.version}/</link>
           </links>
           <doctitle>${project.name} ${project.version}</doctitle>
           <windowtitle>${project.artifactId} ${project.version}</windowtitle>
diff --git a/google-http-client-jdo/pom.xml b/google-http-client-jdo/pom.xml
index 596606f17..8d70eab3b 100644
--- a/google-http-client-jdo/pom.xml
+++ b/google-http-client-jdo/pom.xml
@@ -15,7 +15,7 @@
         <artifactId>maven-javadoc-plugin</artifactId>
         <configuration>
           <links>
-            <link>http://download.oracle.com/javase/1.5.0/docs/api/</link>
+            <link>http://download.oracle.com/javase/6/docs/api/</link>
           </links>
           <doctitle>${project.name} ${project.version}</doctitle>
           <windowtitle>${project.artifactId} ${project.version}</windowtitle>
@@ -30,15 +30,6 @@
             </manifest>
           </archive>
         </configuration>
-        <executions>
-          <execution>
-            <id>jar</id>
-            <phase>compile</phase>
-            <goals>
-              <goal>jar</goal>
-            </goals>
-          </execution>
-        </executions>
       </plugin>
       <plugin>
         <artifactId>maven-source-plugin</artifactId>
diff --git a/google-http-client-test/pom.xml b/google-http-client-test/pom.xml
index 701e3fb07..5f4a0d842 100644
--- a/google-http-client-test/pom.xml
+++ b/google-http-client-test/pom.xml
@@ -16,7 +16,7 @@
         <artifactId>maven-javadoc-plugin</artifactId>
         <configuration>
           <links>
-            <link>http://download.oracle.com/javase/1.5.0/docs/api/</link>
+            <link>http://download.oracle.com/javase/6/docs/api/</link>
           </links>
           <doctitle>${project.name} ${project.version}</doctitle>
           <windowtitle>${project.artifactId} ${project.version}</windowtitle>
diff --git a/google-http-client-xml/pom.xml b/google-http-client-xml/pom.xml
index 9f6a6ecf4..b67fc66d2 100644
--- a/google-http-client-xml/pom.xml
+++ b/google-http-client-xml/pom.xml
@@ -16,7 +16,7 @@
         <artifactId>maven-javadoc-plugin</artifactId>
         <configuration>
           <links>
-            <link>http://download.oracle.com/javase/1.5.0/docs/api/</link>
+            <link>http://download.oracle.com/javase/6/docs/api/</link>
           </links>
           <doctitle>${project.name} ${project.version}</doctitle>
           <windowtitle>${project.artifactId} ${project.version}</windowtitle>
diff --git a/google-http-client/pom.xml b/google-http-client/pom.xml
index 8f384b1d3..351652587 100644
--- a/google-http-client/pom.xml
+++ b/google-http-client/pom.xml
@@ -20,9 +20,9 @@
         <artifactId>maven-javadoc-plugin</artifactId>
         <configuration>
           <links>
-            <link>http://download.oracle.com/javase/1.5.0/docs/api/</link>
-            <link>http://docs.guava-libraries.googlecode.com/git-history/v13.0.1/javadoc</link>
-            <link>http://commons.apache.org/proper/commons-codec/javadocs/api-release</link>
+            <link>http://download.oracle.com/javase/6/docs/api/</link>
+            <link>https://google.github.io/guava/releases/${project.guava.version}/api/docs/</link>
+            <link>https://commons.apache.org/proper/commons-codec/archives/${project.commons-codec.version}/apidocs/</link>
           </links>
           <doctitle>${project.name} ${project.version}</doctitle>
           <windowtitle>${project.artifactId} ${project.version}</windowtitle>
diff --git a/pom.xml b/pom.xml
index 665e4d9b1..e7d255ba7 100644
--- a/pom.xml
+++ b/pom.xml
@@ -152,7 +152,7 @@
       <dependency>
         <groupId>commons-codec</groupId>
         <artifactId>commons-codec</artifactId>
-        <version>1.6</version>
+        <version>${project.commons-codec.version}</version>
       </dependency>
       <dependency>
         <groupId>com.google.guava</groupId>
@@ -272,21 +272,20 @@
     <pluginManagement>
       <plugins>
         <plugin>
-          <artifactId>build-helper-maven-plugin</artifactId>
-          <version>1.5</version>
-        </plugin>
-        <plugin>
-          <artifactId>maven-antrun-plugin</artifactId>
-          <version>1.6</version>
+          <groupId>org.sonatype.plugins</groupId>
+          <artifactId>nexus-staging-maven-plugin</artifactId>
+          <version>1.6.6</version>
+          <extensions>true</extensions>
+          <configuration>
+            <serverId>ossrh</serverId>
+            <nexusUrl>https://oss.sonatype.org/</nexusUrl>
+            <autoReleaseAfterClose>false</autoReleaseAfterClose>
+          </configuration>
         </plugin>
         <plugin>
           <artifactId>maven-assembly-plugin</artifactId>
           <version>2.2</version>
         </plugin>
-        <plugin>
-          <artifactId>maven-clean-plugin</artifactId>
-          <version>2.4.1</version>
-        </plugin>
         <plugin>
           <artifactId>maven-compiler-plugin</artifactId>
           <version>2.3.2</version>
@@ -295,81 +294,53 @@
             <target>1.6</target>
           </configuration>
         </plugin>
+
         <plugin>
-          <artifactId>maven-dependency-plugin</artifactId>
-          <version>2.1</version>
-        </plugin>
-        <plugin>
-          <artifactId>maven-deploy-plugin</artifactId>
-          <version>2.5</version>
-        </plugin>
-        <plugin>
-          <artifactId>maven-ear-plugin</artifactId>
-          <version>2.4.2</version>
-        </plugin>
-        <plugin>
-          <artifactId>maven-ejb-plugin</artifactId>
-          <version>2.3</version>
-        </plugin>
-        <plugin>
-          <artifactId>maven-install-plugin</artifactId>
-          <version>2.3.1</version>
-        </plugin>
-        <plugin>
-          <artifactId>maven-jar-plugin</artifactId>
-          <version>2.3.1</version>
-          <configuration>
-            <archive>
-              <addMavenDescriptor>false</addMavenDescriptor>
-              <manifest>
-                <addDefaultImplementationEntries>true</addDefaultImplementationEntries>
-              </manifest>
-              <manifestEntries>
-                <Built-By>Google</Built-By>
-                <Build-Jdk>1.6.x</Build-Jdk>
-              </manifestEntries>
-            </archive>
-          </configuration>
+          <groupId>org.apache.maven.plugins</groupId>
+          <artifactId>maven-source-plugin</artifactId>
+          <version>2.2.1</version>
+          <executions>
+            <execution>
+              <id>attach-sources</id>
+              <goals>
+                <goal>jar-no-fork</goal>
+              </goals>
+            </execution>
+          </executions>
         </plugin>
         <plugin>
+          <groupId>org.apache.maven.plugins</groupId>
           <artifactId>maven-javadoc-plugin</artifactId>
-          <version>2.9</version>
-        </plugin>
-        <plugin>
-          <artifactId>maven-plugin-plugin</artifactId>
-          <version>2.6</version>
-        </plugin>
-        <plugin>
-          <artifactId>maven-rar-plugin</artifactId>
-          <version>2.2</version>
-        </plugin>
-        <plugin>
-          <artifactId>maven-release-plugin</artifactId>
-          <version>2.1</version>
+          <version>2.9.1</version>
+          <executions>
+            <execution>
+              <id>attach-javadocs</id>
+              <goals>
+                <goal>jar</goal>
+              </goals>
+            </execution>
+          </executions>
         </plugin>
         <plugin>
-          <artifactId>maven-resources-plugin</artifactId>
-          <version>2.4.3</version>
-        </plugin>
-        <plugin>
-          <artifactId>maven-site-plugin</artifactId>
-          <version>2.1.1</version>
-        </plugin>
-        <plugin>
-          <artifactId>maven-source-plugin</artifactId>
-          <version>2.1.2</version>
+          <groupId>org.apache.maven.plugins</groupId>
+          <artifactId>maven-jar-plugin</artifactId>
+          <version>3.0.2</version>
+          <executions>
+            <execution>
+              <goals>
+                <goal>test-jar</goal>
+              </goals>
+            </execution>
+          </executions>
         </plugin>
         <plugin>
           <artifactId>maven-surefire-plugin</artifactId>
-          <version>2.12.4</version>
+          <version>2.19.1</version>
           <configuration>
             <argLine>-Xmx1024m</argLine>
+            <reportNameSuffix>sponge_log</reportNameSuffix>
           </configuration>
         </plugin>
-        <plugin>
-          <artifactId>maven-war-plugin</artifactId>
-          <version>2.1</version>
-        </plugin>
         <plugin>
           <artifactId>maven-checkstyle-plugin</artifactId>
           <version>2.6</version>
@@ -389,11 +360,6 @@
           <artifactId>animal-sniffer-maven-plugin</artifactId>
           <version>1.9</version>
         </plugin>
-        <plugin>
-          <groupId>org.sonatype.plugins</groupId>
-          <artifactId>jarjar-maven-plugin</artifactId>
-          <version>1.9</version>
-        </plugin>
         <plugin>
           <groupId>org.apache.maven.plugins</groupId>
           <artifactId>maven-project-info-reports-plugin</artifactId>
@@ -421,13 +387,13 @@
             <phase>site</phase>
             <configuration>
               <links>
-                <link>https://download.oracle.com/javase/1.6.0/docs/api/</link>
-                <link>https://cloud.google.com/appengine/docs/java/javadoc</link>
-                <link>https://jar-download.com/artifacts/org.codehaus.jackson/jackson-core-asl/1.9.13/documentation</link>
-                <link>http://fasterxml.github.com/jackson-core/javadoc/2.0.5/</link>
-                <link>https://google.github.io/gson/apidocs/</link>
-                <link>https://google.github.io/guava/releases/20.0/api/docs/</link>
-                <link>http://commons.apache.org/proper/commons-codec/javadocs/api-release</link>
+                <link>http://download.oracle.com/javase/6/docs/api/</link>
+                <link>http://cloud.google.com/appengine/docs/java/javadoc</link>
+                <link>https://jar-download.com/artifacts/org.codehaus.jackson/jackson-core-asl/${project.jackson-core-asl.version}/documentation</link>
+                <link>http://fasterxml.github.com/jackson-core/javadoc/${project.jackson-core2.version}/</link>
+                <link>https://www.javadoc.io/doc/com.google.code.gson/gson/${project.gson.version}</link>
+                <link>https://google.github.io/guava/releases/${project.guava.version}/api/docs/</link>
+                <link>https://commons.apache.org/proper/commons-codec/archives/${project.commons-codec.version}/apidocs/</link>
               </links>
               <doctitle>Google HTTP Client Library for Java ${project.version}</doctitle>
               <excludePackageNames>com.google.api.client.findbugs:com.google.api.client.test.:com.google.api.services</excludePackageNames>
@@ -476,6 +442,7 @@
         </executions>
       </plugin>
       <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-checkstyle-plugin</artifactId>
         <configuration>
           <configLocation>checkstyle.xml</configLocation>
@@ -526,7 +493,7 @@
         <configuration>
           <signature>
             <groupId>org.codehaus.mojo.signature</groupId>
-            <artifactId>java15</artifactId>
+            <artifactId>java16</artifactId>
             <version>1.0</version>
           </signature>
         </configuration>
@@ -560,6 +527,7 @@
     <project.guava.version>20.0</project.guava.version>
     <project.xpp3.version>1.1.4c</project.xpp3.version>
     <project.commons-logging.version>1.1.1</project.commons-logging.version>
+    <project.commons-codec.version>1.10</project.commons-codec.version>
     <project.httpclient.version>4.5.5</project.httpclient.version>
     <project.jdo2-api.version>2.3-eb</project.jdo2-api.version>
     <project.datanucleus-core.version>3.2.2</project.datanucleus-core.version>
@@ -567,4 +535,40 @@
     <project.datanucleus-rdbms.version>3.2.1</project.datanucleus-rdbms.version>
     <project.datanucleus-maven-plugin.version>4.0.3</project.datanucleus-maven-plugin.version>
   </properties>
+
+  <profiles>
+    <profile>
+      <id>release-sign-artifacts</id>
+      <activation>
+        <property>
+          <name>performRelease</name>
+          <value>true</value>
+        </property>
+      </activation>
+      <build>
+        <plugins>
+          <plugin>
+            <groupId>org.apache.maven.plugins</groupId>
+            <artifactId>maven-gpg-plugin</artifactId>
+            <version>1.6</version>
+            <executions>
+              <execution>
+                <id>sign-artifacts</id>
+                <phase>verify</phase>
+                <goals>
+                  <goal>sign</goal>
+                </goals>
+                <configuration>
+                  <gpgArguments>
+                    <arg>--pinentry-mode</arg>
+                    <arg>loopback</arg>
+                  </gpgArguments>
+                </configuration>
+              </execution>
+            </executions>
+          </plugin>
+        </plugins>
+      </build>
+    </profile>
+  </profiles>
 </project>