diff --git a/mtf2json/equipment.py b/mtf2json/equipment.py
index 3c4b0e6..584c9eb 100644
--- a/mtf2json/equipment.py
+++ b/mtf2json/equipment.py
@@ -60,4 +60,7 @@
     {"Talons": ["Talons"]},
 ]
 
-storage = ["Liquid Storage", "Cargo"]
+storage: list[dict[str, list[str]]] = [
+    {"Liquid Storage": ["Liquid Storage"]},
+    {"Cargo": ["Cargo"]},
+]