diff --git a/gitdeps.schema.json b/gitdeps.schema.json
new file mode 100644
index 0000000..0456be8
--- /dev/null
+++ b/gitdeps.schema.json
@@ -0,0 +1,39 @@
+{
+  "$schema": "https://json-schema.org/draft/2020-12/schema",
+  "$id": "https://raw.githubusercontent.com/Nelonn/gitdeps/main/gitdeps.schema.json",
+  "title": "gitdeps",
+  "description": "Simplified git submodules",
+  "type": "object",
+  "additionalProperties": {
+    "type": "object",
+    "properties": {
+      "url": {
+        "type": "string",
+        "format": "uri"
+      },
+      "branch": {
+        "type": "string"
+      },
+      "tag": {
+        "type": "string"
+      },
+      "commit": {
+        "type": "string",
+        "pattern": "^[0-9a-f]{40}$"
+      }
+    },
+    "required": ["url"],
+    "oneOf": [
+      {
+        "required": ["branch"]
+      },
+      {
+        "required": ["tag"]
+      },
+      {
+        "required": ["commit"]
+      }
+    ],
+    "additionalProperties": false
+  }
+}
\ No newline at end of file