diff --git a/scripts/bam2bigwig.sh b/scripts/bam2bigwig.sh
index cd7a7d63c649a12030bd9ea8497e76121b5bd998..a02fbb644cf22539ebca1e26a8548751299bd83c 100755
--- a/scripts/bam2bigwig.sh
+++ b/scripts/bam2bigwig.sh
@@ -35,12 +35,18 @@
 
 load_tools ()
 {
-     command -v || module load bedops/2.4.36
-     command -v || module load Python/3.7.2
+     command -v bedmap || module load bedops/2.4.36
+     # command -v bedmap || module load bedops/2.4.37
+     command -v python3 || module load Python/3.7.2
+     # command -v python3 || module load Python/3.8.1
      command -v samtools || module load samtools/1.9
+     # command -v samtools || module load samtools/1.10
      command -v bedtools || module load bedtools/2.25.0
+     # command -v bedtools || module load bedtools/2.29.2
      command -v niceload || module load parallel/20170122
+     # command -v niceload || module load parallel/20200222
      command -v bedGraphToBigWig || module load UCSC-tools/v373
+     # command -v bedGraphToBigWig || module load UCSC-tools/v390
 }
 
 workdir=$(mktemp -d)