diff --git a/pom.xml b/pom.xml
index 5f724318..9cab1f7a 100644
--- a/pom.xml
+++ b/pom.xml
@@ -44,27 +44,27 @@
     <dependency>
       <groupId>javax.servlet</groupId>
       <artifactId>servlet-api</artifactId>
-      <version>2.5</version>
+      <version>[2.5,)</version>
       <scope>provided</scope>
     </dependency>
     <dependency>
       <groupId>log4j</groupId>
       <artifactId>log4j</artifactId>
-      <version>1.2.16</version>
+      <version>[1.2.16,)</version>
       <scope>compile</scope>
       <optional>true</optional>
     </dependency>
     <dependency>
       <groupId>javax.mail</groupId>
       <artifactId>mail</artifactId>
-      <version>1.4.1</version>
+      <version>[1.4.1,)</version>
       <scope>compile</scope>
       <optional>true</optional>
     </dependency>
     <dependency>
       <groupId>org.apache.velocity</groupId>
       <artifactId>velocity</artifactId>
-      <version>1.6.4</version>
+      <version>[1.6.4,)</version>
       <scope>compile</scope>
       <optional>true</optional>
       <exclusions>
@@ -76,7 +76,7 @@
     <dependency>
       <groupId>commons-digester</groupId>
       <artifactId>commons-digester</artifactId>
-      <version>2.0</version>
+      <version>[2.0,)</version>
       <scope>compile</scope>
       <optional>true</optional>
       <exclusions>
@@ -87,13 +87,13 @@
     <dependency>
       <groupId>junit</groupId>
       <artifactId>junit</artifactId>
-      <version>4.8.1</version>
+      <version>[4.8.1,)</version>
       <scope>test</scope>
     </dependency>
     <dependency>
       <groupId>org.hsqldb</groupId>
       <artifactId>hsqldb</artifactId>
-      <version>2.0.0</version>
+      <version>[2.0.0,)</version>
       <scope>test</scope>
     </dependency>
   </dependencies>