diff --git a/mudi/interp/aucell.py b/mudi/interp/aucell.py
index d601848..9d2530c 100644
--- a/mudi/interp/aucell.py
+++ b/mudi/interp/aucell.py
@@ -1,5 +1,5 @@
 from pyscenic.aucell import aucell
-from pyscenic.genesig import GeneSignature
+from ctxcore.genesig import GeneSignature
 import pandas as pd
 import matplotlib.pyplot as plt
 import seaborn as sns
diff --git a/setup.py b/setup.py
index b534c33..244c96d 100644
--- a/setup.py
+++ b/setup.py
@@ -48,7 +48,8 @@
         "ipywidgets", # Added for scanpy,
         "agutil",
         "tqdm",
-        "pyscenic"
+        "pyscenic",
+        "ctxcore"
     ],
     package_data = {
     "":[