diff --git a/reference-nbi/pom.xml b/reference-nbi/pom.xml
old mode 100755
new mode 100644
index 439c2be..58f6c44
--- a/reference-nbi/pom.xml
+++ b/reference-nbi/pom.xml
@@ -186,7 +186,7 @@
         <dependency>
             <groupId>org.webjars</groupId>
             <artifactId>bootstrap</artifactId>
-            <version>3.3.7</version>
+            <version>3.4.0</version>
         </dependency>
         <dependency>
             <groupId>org.webjars</groupId>