diff --git a/javalin-demo/gradle.properties b/javalin-demo/gradle.properties
index 8309842..90406cb 100644
--- a/javalin-demo/gradle.properties
+++ b/javalin-demo/gradle.properties
@@ -13,7 +13,7 @@ commonsEmail=1.6.0
 
 # Testing
 junitVersion=5.10.2
-assertjVersion=3.26.0
+assertjVersion=3.26.3
 mockitoVersion=5.12.0
 seleniumChromeVersion=4.18.1
 seleniumHttpJdkVersion=4.13.0