diff --git a/src/void_tools/cli.py b/src/void_tools/cli.py
index add6206..d3b1425 100644
--- a/src/void_tools/cli.py
+++ b/src/void_tools/cli.py
@@ -204,6 +204,15 @@ def cmd_dispatch(args):
                 continue
                 
             target_uri = mapping[target_id]
+            
+            # Convert AT-URI to bsky.app HTTP URL for Margin compatibility
+            if target_uri.startswith("at://"):
+                parts = target_uri.replace("at://", "").split("/")
+                if len(parts) >= 3:
+                    repo = parts[0]
+                    rkey = parts[2]
+                    target_uri = f"https://bsky.app/profile/{repo}/post/{rkey}"
+                    
             print(f"Dispatching annotation to {target_uri}...")
             
             try: