diff --git a/chromatoR/app.R b/chromatoR/app.R
index dea8a66..390fdcf 100644
--- a/chromatoR/app.R
+++ b/chromatoR/app.R
@@ -1,3 +1,12 @@
+##########################################################
+#                                                        #
+# This app has been written by Marcel Costa-García,      #
+# and has reused some internal functions from sangerseqR #
+# package, including getPeaks and peakvalues             #
+#                                                        #
+##########################################################
+
+
 library(shiny)
 library(tidyverse)
 library(sangerseqR)