diff --git a/pypath/inputs/ramp/_mapping.py b/pypath/inputs/ramp/_mapping.py
index 043fc196a..58ee9910f 100644
--- a/pypath/inputs/ramp/_mapping.py
+++ b/pypath/inputs/ramp/_mapping.py
@@ -19,6 +19,8 @@
 
 from __future__ import annotations
 
+import pandas as pd
+
 from ._sqlite import ramp_raw
 
 __all__ = ['ramp_mapping']