diff --git a/pom.xml b/pom.xml
index d2876c8..fc8c4f5 100644
--- a/pom.xml
+++ b/pom.xml
@@ -47,7 +47,6 @@
 		<dependency>
 			<groupId>com.liferay.portal</groupId>
 			<artifactId>portal-service</artifactId>
-			<version>${liferay.version}</version>
 			<scope>provided</scope>
 		</dependency>
 		<dependency>
@@ -58,7 +57,6 @@
 		<dependency>
 			<groupId>javax.servlet</groupId>
 			<artifactId>javax.servlet-api</artifactId>
-			<version>3.1.0</version>
 			<scope>provided</scope>
 		</dependency>
 
@@ -70,7 +68,6 @@
 		<dependency>
 			<groupId>org.slf4j</groupId>
 			<artifactId>slf4j-api</artifactId>
-			<version>1.7.18</version>
 		</dependency>
 		<dependency>
 			<groupId>jstl</groupId>