diff --git a/pom.xml b/pom.xml
index a21e50b..f959d4c 100644
--- a/pom.xml
+++ b/pom.xml
@@ -45,7 +45,7 @@
         <dependency>
             <groupId>org.eclipse.californium</groupId>
             <artifactId>californium-core</artifactId>
-            <version>2.0.0</version>
+            <version>2.7.3</version>
         </dependency>
         <dependency>
             <groupId>org.eclipse.californium</groupId>