diff --git a/build.gradle b/build.gradle
index 077ca9f..dac343d 100644
--- a/build.gradle
+++ b/build.gradle
@@ -161,7 +161,7 @@ dependencies {
     testImplementation 'junit:junit:4.13.2'
     testImplementation 'com.github.tomakehurst:wiremock:3.0.1'
     testImplementation 'com.unboundid:unboundid-ldapsdk:7.0.5'
-    testImplementation 'com.icegreen:greenmail:1.6.15'
+    testImplementation 'com.icegreen:greenmail:2.1.9'
 }
 
 jar {