diff --git a/cdf_compare.py b/cdf_compare.py
index 6b09604..69906e8 100755
--- a/cdf_compare.py
+++ b/cdf_compare.py
@@ -65,6 +65,7 @@ def plot_cdf(dataframe, column_name, axis=None):
         stats_df.plot(x=column_name, y=["CDF"], grid=True, ax=axis)
     else:
         stats_df.plot(x=column_name, y=["CDF"], grid=True)
+    del stats_df
 
 
 if __name__ == "__main__":