diff --git a/pom.xml b/pom.xml
index 62acb5a..edd1909 100644
--- a/pom.xml
+++ b/pom.xml
@@ -57,7 +57,7 @@
             <dependency>
                 <groupId>org.assertj</groupId>
                 <artifactId>assertj-core</artifactId>
-                <version>3.18.0</version>
+                <version>3.27.7</version>
             </dependency>
             <dependency>
                 <groupId>org.leadpony</groupId>