diff --git a/train-docs/pom.xml b/train-docs/pom.xml
index f4e2dc4..3c41c84 100644
--- a/train-docs/pom.xml
+++ b/train-docs/pom.xml
@@ -16,10 +16,10 @@
 		<main.basedir>${basedir}/..</main.basedir>
 		<upload-docs-zip.phase>deploy</upload-docs-zip.phase>
 
-		<maven.version>3.6.3</maven.version>
-		<handlebars.version>4.2.0</handlebars.version>
-		<asciidoctorj.version>2.1.0</asciidoctorj.version>
-		<commons-io.version>2.7</commons-io.version>
+		<maven.version>3.8.5</maven.version>
+		<handlebars.version>4.3.0</handlebars.version>
+		<asciidoctorj.version>2.5.3</asciidoctorj.version>
+		<commons-io.version>2.11.0</commons-io.version>
 	</properties>
 	<dependencies>
 		<dependency>
@@ -119,9 +119,6 @@
 					<plugin>
 						<groupId>org.apache.maven.plugins</groupId>
 						<artifactId>maven-gpg-plugin</artifactId>
-						<configuration>
-							<skip>true</skip>
-						</configuration>
 					</plugin>
 				</plugins>
 			</build>