diff --git a/solutions/system_design/mint/mint_snippets.py b/solutions/system_design/mint/mint_snippets.py
index cc5d228b..e2b9810d 100644
--- a/solutions/system_design/mint/mint_snippets.py
+++ b/solutions/system_design/mint/mint_snippets.py
@@ -9,6 +9,7 @@ class DefaultCategories(Enum):
     FOOD = 1
     GAS = 2
     SHOPPING = 3
+    GAS = 4
     # ...