diff --git a/countlines-metrics.sh b/countlines-metrics.sh
index d4786e7..ed535d6 100644
--- a/countlines-metrics.sh
+++ b/countlines-metrics.sh
@@ -21,5 +21,9 @@ paste wikiniews_results.tsv wer.tsv > wikiniews_results.tsv
 awk 'BEGIN{FS=OFS="\t"}{ bad = bad + $1; all++ }END{ print bad/all }' < wer.tsv >> wer.txt 
 awk 'BEGIN{FS=OFS="\t"}{ if ( $1 == 0 ) good++; all++ }END{ print good/all }' < wer.tsv >> srr.txt
 
-tail -n 50 wer.txt | sponge wer.txt
-tail -n 50 srr.txt | sponge srr.txt
\ No newline at end of file
+tail -n 50 wer.txt > wer1.txt
+tail -n 50 srr.txt > srr1.txt
+rm wer.txt
+rm srr.txt
+mv wer1.txt wer.txt
+mv srr1.txt srr.txt
\ No newline at end of file