Bump Tomcat version up to align TomEE snapshot
diff --git a/pom.xml b/pom.xml
index e297f3c..a0b5621 100644
--- a/pom.xml
+++ b/pom.xml
@@ -41,7 +41,7 @@
     <openejb.version>8.0.6-SNAPSHOT</openejb.version>
     <tomee.version>8.0.6-SNAPSHOT</tomee.version>
 
-    <tomcat.version>9.0.39</tomcat.version>
+    <tomcat.version>9.0.40</tomcat.version>
 
     <derby.version>10.7.1.1</derby.version>