diff --git a/detector.py b/detector.py
index f67d2b2..c95d25a 100644
--- a/detector.py
+++ b/detector.py
@@ -7,10 +7,8 @@
 import shlex
 
 
-BLAST_MODULE = 'biotools/ncbi-blast-2.3.0+'
-
 BUILD_DB_CMD = 'makeblastdb -dbtype prot -in %s -out %s'
-RUN_BLAST_CMD = 'blastp -query %s -db %s -out %s -outfmt 6'
+RUN_BLAST_CMD = 'blastp -query %s -db %s -out %s -outfmt 6 -num_threads %d'
 
 
 def read_blast_line(line):
@@ -86,10 +84,11 @@ def build(path, db):
 
 
 @cli.command()
+@click.option('--threads', default=1)
 @click.argument('fasta', type=click.Path())
 @click.argument('db')
 @click.argument('output', type=click.Path())
-def blast(fasta, db, output):
+def blast(fasta, db, output, threads):
     """
     Runs Blast.
 
@@ -100,7 +99,7 @@ def blast(fasta, db, output):
 
     click.secho("Running BLASTP... ", fg='green', bold=True)
 
-    cmd = RUN_BLAST_CMD % (fasta, db, output)
+    cmd = RUN_BLAST_CMD % (fasta, db, output, threads)
     click.echo("Executing command: %s" % cmd)
     subprocess.call(shlex.split(cmd))