diff --git a/package.json b/package.json
index 70c5246a66..76e828d993 100644
--- a/package.json
+++ b/package.json
@@ -62,5 +62,14 @@
     "sequence",
     "iteration"
   ],
-  "license": "BSD"
-}
\ No newline at end of file
+  "license": "BSD",
+  "spm": {
+    "main": "dist/immutable.js",
+    "ignore": [
+      "__tests__",
+      "contrib",
+      "resources",
+      "type-definitions"
+    ]
+  }
+}