diff --git a/Dockerfile b/Dockerfile
index 77f97d5..10d0695 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,5 @@
 FROM python:3.10
+SHELL ["/bin/bash", "-c"]
 RUN sed -i 's/ main/ main non-free/' /etc/apt/sources.list.d/debian.sources \
     && apt-get update && apt-get install -y \
     p7zip-full \