diff --git a/docker-compose.yml b/docker-compose.yml
index 445d546..292640e 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -21,6 +21,7 @@ services:
       - ./aria-data/ssh:/root/.ssh:ro               # SSH Keys fuer VM-Zugriff (aria-wohnung)
     environment:
       - HOST=0.0.0.0
+      - SHELL=/bin/sh                               # Claude Code Bash-Tool braucht SHELL-Variable
       - CLAUDE_CODE_BUBBLEWRAP=1                    # Erlaubt --dangerously-skip-permissions als root
     restart: unless-stopped
     networks: