diff --git a/tp_herwig/Dockerfile b/tp_herwig/Dockerfile
index e3b828b5b2a550badec8e688da909aff3a00ce71..496b1c8a691a19be97d222f199136c818e63036c 100644
--- a/tp_herwig/Dockerfile
+++ b/tp_herwig/Dockerfile
@@ -4,4 +4,5 @@ WORKDIR /herwig
 FROM jeppelt/etp_basis:latest
 COPY --from=herwig /herwig .
 
+RUN python3 -m pip install bash_kernel