Upgrade to Spring 4 (#3)

diff --git a/pom.xml b/pom.xml
index f87ee2d..090b918 100644
--- a/pom.xml
+++ b/pom.xml
@@ -84,7 +84,7 @@
       <dependency>
         <groupId>org.springframework</groupId>
         <artifactId>spring-context</artifactId>
-        <version>3.0.5.RELEASE</version>
+        <version>4.3.24.RELEASE</version>
         <exclusions>
           <exclusion>
             <groupId>commons-logging</groupId>
@@ -96,7 +96,7 @@
       <dependency>
         <groupId>org.springframework</groupId>
         <artifactId>spring-webmvc</artifactId>
-        <version>3.0.5.RELEASE</version>
+        <version>4.3.24.RELEASE</version>
         <exclusions>
           <exclusion>
             <groupId>commons-logging</groupId>