diff --git a/Test22-JPA/pom.xml b/Test22-JPA/pom.xml
index a0522fe3..90ee44ba 100644
--- a/Test22-JPA/pom.xml
+++ b/Test22-JPA/pom.xml
@@ -14,7 +14,7 @@
 	<parent>
 		<groupId>org.springframework.boot</groupId>
 		<artifactId>spring-boot-starter-parent</artifactId>
-		<version>1.4.3.RELEASE</version>
+		<version>1.5.9.RELEASE</version>
 		<relativePath/> <!-- lookup parent from repository -->
 	</parent>
 
diff --git a/Test23-REST/pom.xml b/Test23-REST/pom.xml
index 2e44ac09..ebd8919d 100644
--- a/Test23-REST/pom.xml
+++ b/Test23-REST/pom.xml
@@ -14,7 +14,7 @@
 	<parent>
 		<groupId>org.springframework.boot</groupId>
 		<artifactId>spring-boot-starter-parent</artifactId>
-		<version>1.4.3.RELEASE</version>
+		<version>1.5.9.RELEASE</version>
 		<relativePath/> <!-- lookup parent from repository -->
 	</parent>
 
diff --git a/Test24-Transaction/pom.xml b/Test24-Transaction/pom.xml
index 75f6f1f2..dfcef06a 100644
--- a/Test24-Transaction/pom.xml
+++ b/Test24-Transaction/pom.xml
@@ -14,7 +14,7 @@
 	<parent>
 		<groupId>org.springframework.boot</groupId>
 		<artifactId>spring-boot-starter-parent</artifactId>
-		<version>1.4.3.RELEASE</version>
+		<version>1.5.9.RELEASE</version>
 		<relativePath/> <!-- lookup parent from repository -->
 	</parent>
 
diff --git a/Test25-Cache/pom.xml b/Test25-Cache/pom.xml
index f752314b..d1a708b3 100644
--- a/Test25-Cache/pom.xml
+++ b/Test25-Cache/pom.xml
@@ -14,7 +14,7 @@
 	<parent>
 		<groupId>org.springframework.boot</groupId>
 		<artifactId>spring-boot-starter-parent</artifactId>
-		<version>1.4.3.RELEASE</version>
+		<version>1.5.9.RELEASE</version>
 		<relativePath/> <!-- lookup parent from repository -->
 	</parent>
 
diff --git a/Test26-Security/pom.xml b/Test26-Security/pom.xml
index abcd5a77..28736282 100644
--- a/Test26-Security/pom.xml
+++ b/Test26-Security/pom.xml
@@ -14,7 +14,7 @@
     <parent>
         <groupId>org.springframework.boot</groupId>
         <artifactId>spring-boot-starter-parent</artifactId>
-        <version>1.4.3.RELEASE</version>
+        <version>1.5.9.RELEASE</version>
         <relativePath/> <!-- lookup parent from repository -->
     </parent>