diff --git a/server.py b/server.py
index 2f3b438bb..1a6332fb3 100644
--- a/server.py
+++ b/server.py
@@ -890,11 +890,19 @@ class PromptServer():
         async def get_history(request):
             max_items = request.rel_url.query.get("max_items", None)
             if max_items is not None:
-                max_items = int(max_items)
-
+                try:
+                    max_items = int(max_items)
+                    if max_items <= 0:
+                        return web.json_response({"error": "max_items must be a positive integer"}, status=400)
+                except (ValueError, TypeError):
+                    return web.json_response({"error": "max_items must be an integer"}, status=400)
+            
             offset = request.rel_url.query.get("offset", None)
             if offset is not None:
-                offset = int(offset)
+                try:
+                    offset = int(offset)
+                except (ValueError, TypeError):
+                    return web.json_response({"error": "offset must be an integer"}, status=400)
             else:
                 offset = -1