diff --git a/pom.xml b/pom.xml
index ef10862..ff2a2be 100644
--- a/pom.xml
+++ b/pom.xml
@@ -38,7 +38,7 @@
         <dependency>
             <groupId>org.eclipse.californium</groupId>
             <artifactId>californium-core</artifactId>
-            <version>2.1.0</version>
+            <version>2.7.3</version>
         </dependency>
         <dependency>
             <groupId>org.eclipse.californium</groupId>