diff --git a/py4DSTEM/process/diffraction/crystal.py b/py4DSTEM/process/diffraction/crystal.py
index be4e32ddc..6be8b4b86 100644
--- a/py4DSTEM/process/diffraction/crystal.py
+++ b/py4DSTEM/process/diffraction/crystal.py
@@ -434,9 +434,7 @@ def from_prismatic(filepath):
 
         # check if ase is installed
         if find_spec("ase") is None:
-            raise ImportWarning(
-                "Could not import ASE, please install, and try again"
-            )
+            raise ImportWarning("Could not import ASE, please install, and try again")
         else:
             from ase.io import read