diff --git a/my-samples/auth-server-05-oauth2-login/pom.xml b/my-samples/auth-server-05-oauth2-login/pom.xml
index 7fd44bc..b78a490 100644
--- a/my-samples/auth-server-05-oauth2-login/pom.xml
+++ b/my-samples/auth-server-05-oauth2-login/pom.xml
@@ -37,7 +37,7 @@
         <dependency>
             <groupId>org.webjars</groupId>
             <artifactId>bootstrap</artifactId>
-            <version>5.3.5</version>
+            <version>5.3.8</version>
         </dependency>
         <dependency>
             <groupId>org.webjars</groupId>
diff --git a/my-samples/auth-server-06-oauth2-login/pom.xml b/my-samples/auth-server-06-oauth2-login/pom.xml
index df99895..4cd1c5f 100644
--- a/my-samples/auth-server-06-oauth2-login/pom.xml
+++ b/my-samples/auth-server-06-oauth2-login/pom.xml
@@ -43,7 +43,7 @@
         <dependency>
             <groupId>org.webjars</groupId>
             <artifactId>bootstrap</artifactId>
-            <version>5.3.5</version>
+            <version>5.3.8</version>
         </dependency>
         <dependency>
             <groupId>org.webjars</groupId>
diff --git a/spring-official-samples/demo-client/pom.xml b/spring-official-samples/demo-client/pom.xml
index 62d3372..bad352a 100644
--- a/spring-official-samples/demo-client/pom.xml
+++ b/spring-official-samples/demo-client/pom.xml
@@ -48,7 +48,7 @@
         <dependency>
             <groupId>org.webjars</groupId>
             <artifactId>bootstrap</artifactId>
-            <version>5.3.5</version>
+            <version>5.3.8</version>
         </dependency>
         <dependency>
             <groupId>org.webjars</groupId>