diff --git a/pom.xml b/pom.xml
index 52deb7f..f401fc9 100644
--- a/pom.xml
+++ b/pom.xml
@@ -11,7 +11,7 @@
 
     <properties>
         <java.version>15</java.version>
-        <vaadin.version>20.0.0.alpha6</vaadin.version>
+        <vaadin.version>21.0.0.alpha5</vaadin.version>
     </properties>
 
     <parent>