diff --git a/R-package/demo/runall.R b/R-package/demo/runall.R
index 7732ecec2..83e873dca 100644
--- a/R-package/demo/runall.R
+++ b/R-package/demo/runall.R
@@ -1,8 +1,8 @@
 # running all scripts in demo folder
-source('basic_walkthrough.R')
-source('custom_objective.R')
-source('boost_from_prediction.R')
-source('predict_first_ntree.R')
-source('generalized_linear_model.R')
-source('cross_validation.R')
+demo(basic_walkthrough)
+demo(custom_objective)
+demo(boost_from_prediction)
+demo(predict_first_ntree)
+demo(generalized_linear_model)
+demo(cross_validation)