diff --git a/jupyterhub/base-cuda12.2-cudnn8-py3.11/Dockerfile b/jupyterhub/base-cuda12.2-cudnn8-py3.11/Dockerfile
index 687af53..70d94da 100644
--- a/jupyterhub/base-cuda12.2-cudnn8-py3.11/Dockerfile
+++ b/jupyterhub/base-cuda12.2-cudnn8-py3.11/Dockerfile
@@ -97,7 +97,7 @@ USER ${NB_UID}
 
 RUN chsh -s /bin/zsh
 
-SHELL ["/bin/zsh", "-o", "pipefail", "-c"]
+SHELL ["/bin/bash", "-o", "pipefail", "-c"]
 
 RUN <<EOF
     echo "alias ls='eza'" >> ~/.bashrc
diff --git a/jupyterhub/base-py3.11/Dockerfile b/jupyterhub/base-py3.11/Dockerfile
index c4ffdc8..8216d07 100644
--- a/jupyterhub/base-py3.11/Dockerfile
+++ b/jupyterhub/base-py3.11/Dockerfile
@@ -97,7 +97,7 @@ USER ${NB_UID}
 
 RUN chsh -s /bin/zsh
 
-SHELL ["/bin/zsh", "-o", "pipefail", "-c"]
+SHELL ["/bin/bash", "-o", "pipefail", "-c"]
 
 RUN <<EOF
     echo "alias ls='eza'" >> ~/.bashrc