diff --git a/app/pom.xml b/app/pom.xml
index 96890a6..85b451e 100644
--- a/app/pom.xml
+++ b/app/pom.xml
@@ -32,7 +32,7 @@
         <dependency>
             <groupId>com.github.untisapi</groupId>
             <artifactId>untis4j</artifactId>
-            <version>v1.3.3</version>
+            <version>v1.3.4</version>
         </dependency>
         <dependency>
             <groupId>org.mnode.ical4j</groupId>