diff --git a/lectures/build.gradle b/lectures/build.gradle
index 94ec6b78ea0c9f2d8518e03d92093dab28b3b941..2aa92bc14492ba53c6b05c24587d903429da3749 100644
--- a/lectures/build.gradle
+++ b/lectures/build.gradle
@@ -39,7 +39,7 @@ asciidoctorj {
     }
     // useIntermediateWorkDir = true
     attributes toc: 'left',
-    	'source-highlighter': 'highlight.js'
+    	'source-highlighter': 'highlightjs'
 
     /*	
 	extensions {
@@ -90,7 +90,7 @@ asciidoctorRevealJs {
 }
 
 revealjs {
-	version '2.0.0' // why not '3.8.0' 
+	version '2.0.0' //  why not '3.8.0' 
 	templateGitHub {
    		organisation = 'hakimel'
     	repository = 'reveal.js'