diff --git a/exec/heatmap_example.R b/exec/heatmap_example.R
index 9f32763..6f65148 100644
--- a/exec/heatmap_example.R
+++ b/exec/heatmap_example.R
@@ -8,6 +8,7 @@ source("../R/transformation.R")
 source("../R/heatmap.R")
 source("../R/label.R")
 source("../R/limit.R")
+source("../R/global.R")
 
 ####Test Data
 data <- data.table::as.data.table(mtcars, keep.rowname = "id")