diff --git a/docs/Modders/Type-checking.md b/docs/Modders/Type-checking.md
index b36b26f097..84b4c7818a 100644
--- a/docs/Modders/Type-checking.md
+++ b/docs/Modders/Type-checking.md
@@ -41,6 +41,12 @@ Tada! Now Android Studio will recognize all Buildings.json files as belonging to
               "*/Nations.json"
             ],
             "url": "https://raw.githubusercontent.com/yairm210/Unciv/master/docs/Modders/schemas/nations.json"
+        },
+        {
+            "fileMatch": [
+              "*/TileImprovements.json"
+            ],
+            "url": "https://raw.githubusercontent.com/yairm210/Unciv/master/docs/Modders/schemas/tileImprovements.json"
         }
     ]
 ```
diff --git a/docs/Modders/schemas/buildings.json b/docs/Modders/schemas/buildings.json
index 4773c70871..4d06c0d122 100644
--- a/docs/Modders/schemas/buildings.json
+++ b/docs/Modders/schemas/buildings.json
@@ -18,9 +18,9 @@
           "civilopediaText": { "$ref": "https://raw.githubusercontent.com/yairm210/Unciv/master/docs/Modders/schemas/civilopediaText.json" },
 
           "requiredTech": { "type": "string" },
-          "cost": { "type": "number" },
+          "cost": { "type": "integer" },
           "maintenance": {
-              "type": "number",
+              "type": "integer",
               "description": "Gold upkeep per turn for this building"
           },
           "percentStatBonus": { "$ref": "https://raw.githubusercontent.com/yairm210/Unciv/master/docs/Modders/schemas/stats.json" },
@@ -44,8 +44,8 @@
               "items": { "type": "string" },
               "uniqueItems": true
           },
-          "cityStrength": { "type": "number" },
-          "cityHealth": { "type": "number" },
+          "cityStrength": { "type": "integer" },
+          "cityHealth": { "type": "integer" },
 
           "uniqueTo": {
               "type": "string",
diff --git a/docs/Modders/schemas/tileImprovements.json b/docs/Modders/schemas/tileImprovements.json
new file mode 100644
index 0000000000..d024c9aec1
--- /dev/null
+++ b/docs/Modders/schemas/tileImprovements.json
@@ -0,0 +1,38 @@
+{
+  "$schema": "http://json-schema.org/draft-07/schema",
+  "type": "array",
+  "items": {
+      "type": "object",
+      "properties": {
+          "name": { "type": "string" },
+          "terrainsCanBeBuiltOn": {
+              "type": "array",
+              "items": { "type": "string" },
+              "uniqueItems": true,
+          },
+          "turnsToBuild": { "type": "integer" },
+          "techRequired": { "type": "string" },
+          "uniqueTo": { "type": "string" },
+          "shortcutKey": {
+              "type": "string",
+              "maxLength": 1
+          },
+
+          "production": { "type": "number" },
+          "food": { "type": "number" },
+          "gold": { "type": "number" },
+          "science": { "type": "number" },
+          "culture": { "type": "number" },
+          "happiness": { "type": "number" },
+          "faith": { "type": "number" },
+
+          "uniques": { "$ref": "https://raw.githubusercontent.com/yairm210/Unciv/master/docs/Modders/schemas/uniques.json" },
+
+          "civilopediaText": { "$ref": "https://raw.githubusercontent.com/yairm210/Unciv/master/docs/Modders/schemas/civilopediaText.json" }
+      },
+      "required": [
+          "name",
+      ],
+      "additionalProperties": false
+  }
+}