diff --git a/Dockerfile b/Dockerfile
index aaeb107..bf3941c 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -5,7 +5,6 @@ RUN apt install -y git
 RUN apt install -y gcc
 RUN gcc --version
 RUN apt install -y build-essential
-RUN apt install -y python3
 RUN git clone https://github.com/usnistgov/SCTK.git
 WORKDIR SCTK
 RUN make config && make all && make check &&  make install && make doc
diff --git a/calc_metrics.sh b/calc_metrics.sh
index 0fe63ce..06e653e 100755
--- a/calc_metrics.sh
+++ b/calc_metrics.sh
@@ -1,7 +1,7 @@
 #!/usr/bin/env bash
 cut -f2 wikiniews_results.tsv | awk 'BEGIN{FS=OFS="\t"}{print $0,"(sp1_"NR")"}' > hyp.trn
 cut -f3 wikiniews_results.tsv | awk 'BEGIN{FS=OFS="\t"}{print $0,"(sp1_"NR")"}' > ref.trn
-sclite -f 0 -r ref.trn trn -h hyp.trn trn -e utf-8 -i rm -o sum stdout | grep "Sum/Avg" | python3 -c "import sys; import re; print('\t'.join(re.findall(r'(\d+\.\d+)', sys.stdin.read())[-2:]))" > wer_srr.txt
+sclite -f 0 -r ref.trn trn -h hyp.trn trn -e utf-8 -i rm -o sum stdout | grep "Sum/Avg" | python2 -c "import sys; import re; print('\t'.join(re.findall(r'(\d+\.\d+)', sys.stdin.read())[-2:]))" > wer_srr.txt
 cut -f1 wer_srr.txt > wer_total.txt
 cut -f2 wer_srr.txt > srr.txt