diff --git a/csst_common/pipeline.py b/csst_common/pipeline.py
index bc07096919664acc27e2c513e88e50ac752910a6..aec9333d07217176ffe951ac425700100e2f5775 100644
--- a/csst_common/pipeline.py
+++ b/csst_common/pipeline.py
@@ -59,6 +59,8 @@ class Pipeline:
         if filter_warnings:
             self.filter_warnings()
 
+        self.ban_multithreading()
+
     def ban_multithreading(self):
         os.environ["OMP_NUM_THREADS"] = "1"
         os.environ["MKL_NUM_THREADS"] = "1"