diff --git a/bigdata/pom.xml b/bigdata/pom.xml
index 69fa8af9..5cf9fea2 100644
--- a/bigdata/pom.xml
+++ b/bigdata/pom.xml
@@ -30,7 +30,7 @@
         <dependency>
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-starter-web</artifactId>
-            <version>2.3.4.RELEASE</version>
+            <version>2.5.12</version>
         </dependency>
         <dependency>
             <groupId>org.apache.spark</groupId>
diff --git a/container-all/pom.xml b/container-all/pom.xml
index 5e39ab91..41efdc7b 100644
--- a/container-all/pom.xml
+++ b/container-all/pom.xml
@@ -32,7 +32,7 @@
                     <artifactId>spring-boot-starter-tomcat</artifactId>
                 </exclusion>
             </exclusions>
-            <version>2.3.4.RELEASE</version>
+            <version>2.5.12</version>
         </dependency>
         <dependency>
             <groupId>org.springframework.boot</groupId>
diff --git a/guides-parent/pom.xml b/guides-parent/pom.xml
index 1ac46146..c3ee6284 100644
--- a/guides-parent/pom.xml
+++ b/guides-parent/pom.xml
@@ -14,7 +14,7 @@
 
     <properties>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-        <spring-boot.version>2.3.4.RELEASE</spring-boot.version>
+        <spring-boot.version>2.5.12</spring-boot.version>
         <java.version>1.8</java.version>
         <version.jackson.core>2.10.0</version.jackson.core>
     </properties>