diff --git a/app/modules/tools/surge.py b/app/modules/tools/surge.py
index 5aedb2b..6c987a8 100644
--- a/app/modules/tools/surge.py
+++ b/app/modules/tools/surge.py
@@ -59,4 +59,4 @@ def generateStructures(molecular_formula: str):
             smiles.append(line.decode("utf-8").rstrip())
         return smiles
     else:
-        return "The molecular formula contains more heavy atoms than allowed."
+        return "The molecular formula contains more heavy atoms than allowed (10 Heavy Atoms max)."