update test dependencies
diff --git a/pom.xml b/pom.xml
index abaf903..e0d458e 100644
--- a/pom.xml
+++ b/pom.xml
@@ -299,13 +299,13 @@
     <dependency>
       <groupId>org.mockito</groupId>
       <artifactId>mockito-core</artifactId>
-      <version>4.8.0</version>
+      <version>5.1.1</version>
       <scope>test</scope>
     </dependency>
     <dependency>
       <groupId>com.icegreen</groupId>
       <artifactId>greenmail</artifactId>
-      <version>2.0.0-alpha-2</version>
+      <version>2.0.0</version>
       <scope>test</scope>
     </dependency>
     <dependency>