diff --git a/sia/__main__.py b/sia/__main__.py
index 199eb88..3da918f 100644
--- a/sia/__main__.py
+++ b/sia/__main__.py
@@ -15,7 +15,7 @@ async def run_web_server():
     base_dir = Path(__file__).parent.parent
 
     # Load system prompt and action schema
-    system_prompt = (base_dir / "system_prompt.txt").read_text()
+    system_prompt = (base_dir / "system_prompt.md").read_text()
     action_schema = (base_dir / "action_schema.xsd").read_text()
 
     # Initialize core components
diff --git a/system_prompt.txt b/system_prompt.md
similarity index 100%
rename from system_prompt.txt
rename to system_prompt.md