diff --git a/gpt_engineer/steps.py b/gpt_engineer/steps.py
index 11cfc0f..60fea23 100644
--- a/gpt_engineer/steps.py
+++ b/gpt_engineer/steps.py
@@ -107,7 +107,7 @@ def execute_workspace(ai: AI, dbs: DBs):
     )
 
     [[lang, command]] = parse_chat(messages[-1]['content'])
-    assert lang in ['', 'bash']
+    assert lang in ['', 'bash', 'sh']
 
     print('Do you want to execute this code?')
     print(command)