diff --git a/calc_metrics.sh b/calc_metrics.sh
index 62cf781..7e233bd 100755
--- a/calc_metrics.sh
+++ b/calc_metrics.sh
@@ -5,7 +5,7 @@ cut -f3 wikiniews_results.tsv | awk 'BEGIN{FS=OFS="\t"}{print $0,"(sp1_"NR")"}'
 sclite -f 0 -r ref.trn trn -h hyp.trn trn -e utf-8 -i rm -o pra stdout | grep "Scores:" | sed 's/Scores: (#C #S #D #I) // ' | awk '{ c=$1; s=$2; d=$3; i=$4; print ($s+$d+$i)/($s+$d+$c)}' > wer_all.txt
 awk '{ sum += $1; n++ } END { print sum / n; }' < wer_all.txt >> wer.txt
 
-python -c "print(`grep -c '^0$' wer_all.txt`/`cat wer_all.txt | wc -l`)" >> srr.txt
+python3 -c "print(`grep -c '^0$' wer_all.txt`/`cat wer_all.txt | wc -l`)" >> srr.txt
 paste wikiniews_results.tsv wer.txt > wikinews_results.tsv
 rm wikiniews_results.tsv