diff --git a/jhotdraw-utils/pom.xml b/jhotdraw-utils/pom.xml
index 5b2d2cd2..9c453f96 100644
--- a/jhotdraw-utils/pom.xml
+++ b/jhotdraw-utils/pom.xml
@@ -17,7 +17,7 @@
     <dependency>
       <groupId>org.assertj</groupId>
       <artifactId>assertj-core</artifactId>
-      <version>3.23.1</version>
+      <version>3.27.7</version>
       <scope>test</scope>
     </dependency>
   </dependencies>
diff --git a/pom.xml b/pom.xml
index 7a11fc92..4981943d 100644
--- a/pom.xml
+++ b/pom.xml
@@ -53,7 +53,7 @@
       <dependency>
         <groupId>org.assertj</groupId>
         <artifactId>assertj-core</artifactId>
-        <version>3.25.3</version>
+        <version>3.27.7</version>
         <scope>test</scope>
       </dependency>
     </dependencies>