diff --git a/pom.xml b/pom.xml
index a496a5f..51dcd28 100644
--- a/pom.xml
+++ b/pom.xml
@@ -129,7 +129,7 @@
         <dependency>
             <groupId>org.springframework</groupId>
             <artifactId>spring-expression</artifactId>
-            <version>5.3.27</version>
+            <version>5.3.39</version>
         </dependency>
         <dependency>
             <groupId>ch.qos.logback</groupId>
@@ -141,6 +141,11 @@
             <artifactId>xmlunit-core</artifactId>
             <version>2.10.0</version>
         </dependency>
+        <dependency>
+            <groupId>org.apache.tomcat.embed</groupId>
+            <artifactId>tomcat-embed-websocket</artifactId>
+            <version>9.0.86</version>
+        </dependency>
     </dependencies>
     <build>
         <plugins>