diff --git a/junit5-assertj-sample/pom.xml b/junit5-assertj-sample/pom.xml
index 2afffb8..d741e8d 100644
--- a/junit5-assertj-sample/pom.xml
+++ b/junit5-assertj-sample/pom.xml
@@ -14,7 +14,7 @@
         <maven.compiler.source>17</maven.compiler.source>
         <maven.compiler.target>17</maven.compiler.target>
         <junit.version>5.9.2</junit.version>
-        <assertj-core.version>3.24.2</assertj-core.version>
+        <assertj-core.version>3.27.5</assertj-core.version>
     </properties>
 
     <dependencyManagement>
diff --git a/junit5-maven-sample/pom.xml b/junit5-maven-sample/pom.xml
index e038329..46e4134 100644
--- a/junit5-maven-sample/pom.xml
+++ b/junit5-maven-sample/pom.xml
@@ -14,7 +14,7 @@
         <maven.compiler.source>17</maven.compiler.source>
         <maven.compiler.target>17</maven.compiler.target>
         <junit.version>5.9.2</junit.version>
-        <assertj-core.version>3.24.2</assertj-core.version>
+        <assertj-core.version>3.27.5</assertj-core.version>
     </properties>
 
     <dependencyManagement>
diff --git a/junit5-mockito-sample/pom.xml b/junit5-mockito-sample/pom.xml
index 9f86d76..fd16333 100644
--- a/junit5-mockito-sample/pom.xml
+++ b/junit5-mockito-sample/pom.xml
@@ -14,7 +14,7 @@
         <maven.compiler.source>17</maven.compiler.source>
         <maven.compiler.target>17</maven.compiler.target>
         <junit.version>5.9.2</junit.version>
-        <assertj-core.version>3.24.2</assertj-core.version>
+        <assertj-core.version>3.27.5</assertj-core.version>
         <mockito-core.version>5.2.0</mockito-core.version>
     </properties>