diff --git a/dpdata/cp2k/output.py b/dpdata/cp2k/output.py
index bc70efaf6..808387a3b 100644
--- a/dpdata/cp2k/output.py
+++ b/dpdata/cp2k/output.py
@@ -3,7 +3,7 @@
 import re
 from collections import OrderedDict
 
-from scipy.constants.constants import R
+from scipy.constants import R
 from .cell import cell_to_low_triangle
 from ..unit import EnergyConversion, LengthConversion, ForceConversion, PressureConversion