diff --git a/definitions/07-Hiro-Inventory.json b/definitions/07-Hiro-Inventory.json
index 68cb33a..101d88c 100644
--- a/definitions/07-Hiro-Inventory.json
+++ b/definitions/07-Hiro-Inventory.json
@@ -33,5 +33,10 @@
           "prop2": 456
         }
       }
+    },
+    "limits": {
+      "categories": {
+        "category1": 10
+      }
     }
 }
diff --git a/inventory.go b/inventory.go
index 479827a..130436f 100644
--- a/inventory.go
+++ b/inventory.go
@@ -22,6 +22,7 @@ import (
 
 type InventoryConfig struct {
 	Items    map[string]*InventoryConfigItem `json:"items,omitempty"`
+	Limits   *InventoryConfigLimits          `json:"limits,omitempty"`
 	ItemSets map[string]map[string]bool      `json:"-"` // Auto-computed when the config is read or personalized.
 }
 
@@ -40,6 +41,11 @@ type InventoryConfigItem struct {
 	KeepZero          bool                 `json:"keep_zero,omitempty"`
 }
 
+type InventoryConfigLimits struct {
+	Categories map[string]int64 `json:"categories,omitempty"`
+	ItemSets   map[string]int64 `json:"item_sets,omitempty"`
+}
+
 // The InventorySystem provides a gameplay system which can manage a player's inventory.
 //
 // A player can have items added via economy rewards, or directly.
diff --git a/schemas/07-Hiro-Inventory.json b/schemas/07-Hiro-Inventory.json
index 09833de..bd653ae 100644
--- a/schemas/07-Hiro-Inventory.json
+++ b/schemas/07-Hiro-Inventory.json
@@ -70,6 +70,29 @@
         }
       },
       "type": "object"
+    },
+    "limits": {
+      "properties": {
+        "categories": {
+          "patternProperties": {
+            ".+": {
+              "minimum": 0,
+              "type": "number"
+            }
+          },
+          "type": "object"
+        },
+        "item_sets": {
+          "patternProperties": {
+            ".+": {
+              "minimum": 0,
+              "type": "number"
+            }
+          },
+          "type": "object"
+        }
+      },
+      "type": "object"
     }
   },
   "type": "object"