diff --git a/bin/2.2_motif_estimation/get_best_motif.py b/bin/2.2_motif_estimation/get_best_motif.py
index 7f9589d..532a1f3 100644
--- a/bin/2.2_motif_estimation/get_best_motif.py
+++ b/bin/2.2_motif_estimation/get_best_motif.py
@@ -1,3 +1,5 @@
+#!/usr/bin/env python
+
 '''
 parses arguments using argparse
 @return args list of all parameters
diff --git a/bin/2.2_motif_estimation/get_motif_seq.R b/bin/2.2_motif_estimation/get_motif_seq.R
index 6f298b3..dda4bd3 100644
--- a/bin/2.2_motif_estimation/get_motif_seq.R
+++ b/bin/2.2_motif_estimation/get_motif_seq.R
@@ -32,7 +32,7 @@ read_data <- function(path){
 #' @param output Output JSON-file
 #' @param num Get best (num) motifs.
 #'
-#' @author Ren� Wiegandt <Rene.Wiegandt(at)mpi-bn.mpg.de>
+#' @author René Wiegandt <Rene.Wiegandt(at)mpi-bn.mpg.de>
 create_seq_json <- function(input, output, num, tmp_path, cluster_id) {
 
   if (!file.exists(input)) {
diff --git a/bin/2.2_motif_estimation/motif_estimation.nf b/bin/2.2_motif_estimation/motif_estimation.nf
index 430040e..f0eb530 100644
--- a/bin/2.2_motif_estimation/motif_estimation.nf
+++ b/bin/2.2_motif_estimation/motif_estimation.nf
@@ -1,3 +1,4 @@
+#!/usr/bin/env nextflow
 
 params.bed = ""
 params.out = ""