diff --git a/DockerfileRocket b/DockerfileRocket
index 59e6a4c7..ed06a2cc 100644
--- a/DockerfileRocket
+++ b/DockerfileRocket
@@ -20,7 +20,7 @@ SHELL ["/bin/bash", "-lc"]
 # install asdf to manage all the thingz!!!
 RUN git clone https://github.com/asdf-vm/asdf.git ~/.asdf --branch v0.13.1 && \
     echo ". $HOME/.asdf/asdf.sh" >> /root/.bashrc && \
-    echo ". $HOME/.asdf/asdf.sh" >> /root/.zshrc
+    . $HOME/.asdf/asdf.sh
 
 # install Scarb
 RUN asdf plugin add scarb