diff --git a/src/mailpit-java-client/pom.xml b/src/mailpit-java-client/pom.xml
index d9a7c3a..165b04b 100644
--- a/src/mailpit-java-client/pom.xml
+++ b/src/mailpit-java-client/pom.xml
@@ -100,7 +100,7 @@
 		<dependency>
 			<groupId>org.simplejavamail</groupId>
 			<artifactId>simple-java-mail</artifactId>
-			<version>9.3.5</version>
+			<version>9.3.9</version>
 			<scope>test</scope>
 		</dependency>
 	</dependencies>