diff --git a/build.gradle b/build.gradle
index c121f77..4667549 100644
--- a/build.gradle
+++ b/build.gradle
@@ -28,7 +28,7 @@ dependencies {
     implementation 'net.sourceforge.plantuml:plantuml-mit:1.2024.4'
     implementation 'org.jetbrains.kotlinx:kotlinx-coroutines-core:1.9.0'
 
-    testImplementation 'org.assertj:assertj-core:3.25.3'
+    testImplementation 'org.assertj:assertj-core:3.26.3'
     testImplementation 'com.approvaltests:approvaltests:24.5.0'
     testImplementation 'org.junit.jupiter:junit-jupiter-api:5.11.0'
     testImplementation 'org.junit.jupiter:junit-jupiter-params:5.11.0'