diff --git a/spring-docs-ui/pom.xml b/spring-docs-ui/pom.xml
index a72e23b..4887ae5 100644
--- a/spring-docs-ui/pom.xml
+++ b/spring-docs-ui/pom.xml
@@ -32,7 +32,7 @@
         <dependency>
             <groupId>org.webjars</groupId>
             <artifactId>bootstrap</artifactId>
-            <version>3.3.6</version>
+            <version>4.5.2</version>
             <scope>runtime</scope>
         </dependency>
         <dependency>