diff --git a/workflow/rna-seq.nf b/workflow/rna-seq.nf
index 7d5e1d397a9dd74ce0b5a90605dfa90a04af3e2c..2c5e6fdab5c910ae3c7337515fcd3abdd0bf79d9 100644
--- a/workflow/rna-seq.nf
+++ b/workflow/rna-seq.nf
@@ -304,11 +304,11 @@ process trimData {
     echo -e "LOG: trimming ${ends}" >> ${repRID}.trimData.log
     if [ "${ends}" == "se" ]
     then
-      trim_galore --gzip -q 25 --illumina --length 35 --basename ${repRID} -j `nproc` ${fastq[0]}
+      trim_galore --gzip -q 25 --length 35 --basename ${repRID} -j 4 ${fastq[0]}
       readLength=\$(zcat *_trimmed.fq.gz | awk '{if(NR%4==2) print length(\$1)}' | sort -n | awk '{a[NR]=\$0}END{print(NR%2==1)?a[int(NR/2)+1]:(a[NR/2]+a[NR/2+1])/2}')
     elif [ "${ends}" == "pe" ]
     then
-      trim_galore --gzip -q 25 --illumina --length 35 --paired --basename ${repRID} -j `nproc` ${fastq[0]} ${fastq[1]}
+      trim_galore --gzip -q 25 --length 35 --paired --basename ${repRID} -j 4 ${fastq[0]} ${fastq[1]}
       readLength=\$(zcat *_1.fq.gz | awk '{if(NR%4==2) print length(\$1)}' | sort -n | awk '{a[NR]=\$0}END{print(NR%2==1)?a[int(NR/2)+1]:(a[NR/2]+a[NR/2+1])/2}')
     fi
     echo -e "LOG: trimmed" >> ${repRID}.trimData.log