diff --git a/frangiPANe/snakefiles/plot_mapping.smk b/frangiPANe/snakefiles/plot_mapping.smk
index 9876bd24522dc20a43a50cc3eaf560d15cacb54a..70ac8306ebe114082ae2e8f08f8ee736ae03dd1c 100644
--- a/frangiPANe/snakefiles/plot_mapping.smk
+++ b/frangiPANe/snakefiles/plot_mapping.smk
@@ -19,6 +19,7 @@ rule plot_mapping:
 """
     run:
         import pandas as pd
+        import matplotlib.pyplot as plt
         import seaborn as sns
 
         df_bam_stat = pd.read_csv(input.csv,index_col=False,sep=",")