diff --git a/pom.xml b/pom.xml
index f830e14b..5ebc83d5 100644
--- a/pom.xml
+++ b/pom.xml
@@ -103,14 +103,33 @@
         <dependency>
             <groupId>com.google.guava</groupId>
             <artifactId>guava</artifactId>
-            <version>10.0</version>
+            <version>10.0.1</version>
             <type>jar</type>
             <scope>compile</scope>
         </dependency>
+        <dependency>
+            <groupId>commons-lang</groupId>
+            <artifactId>commons-lang</artifactId>
+            <version>2.3</version>
+        </dependency>
+
+        <!-- testing -->
         <dependency>
             <groupId>junit</groupId>
-            <artifactId>junit</artifactId>
-            <version>4.9</version>
+            <artifactId>junit-dep</artifactId>
+            <version>4.10</version>
+            <scope>test</scope>
+            <exclusions>
+                <exclusion>
+                    <artifactId>hamcrest-core</artifactId>
+                    <groupId>org.hamcrest</groupId>
+                </exclusion>
+            </exclusions>
+        </dependency>
+        <dependency>
+            <groupId>org.hamcrest</groupId>
+            <artifactId>hamcrest-library</artifactId>
+            <version>1.2.1</version>
             <scope>test</scope>
         </dependency>
     </dependencies>