diff --git a/pom.xml b/pom.xml
index 535a7b53181..1398bb07aba 100644
--- a/pom.xml
+++ b/pom.xml
@@ -111,7 +111,7 @@
 
     <!-- Shared properties with plugins and version numbers across submodules-->
     <asciidoctorj.version>2.5.3</asciidoctorj.version>
-    <bootstrap.version>3.4.1</bootstrap.version>
+    <bootstrap.version>4.0.0</bootstrap.version>
     <cglib.version>2.2</cglib.version>
     <!-- do not update necessary for lesson -->
     <checkstyle.version>3.1.2</checkstyle.version>