diff --git a/src/flair/flair_diffExp.py b/src/flair/flair_diffExp.py
index f3c595e1..cd5ef1d6 100755
--- a/src/flair/flair_diffExp.py
+++ b/src/flair/flair_diffExp.py
@@ -26,7 +26,6 @@
 
 from flair import FlairError, FlairInputDataError, set_unix_path
 
-os.environ['OPENBLAS_NUM_THREADS'] = '1'
 import numpy as np