diff --git a/.spmignore b/.spmignore
new file mode 100644
index 0000000..0cf3928
--- /dev/null
+++ b/.spmignore
@@ -0,0 +1,2 @@
+css
+test
diff --git a/package.json b/package.json
index ebc4b3f..a94f52c 100644
--- a/package.json
+++ b/package.json
@@ -47,5 +47,8 @@
   "scripts": {
     "test": "grunt test"
   },
-  "main": "js/md5.js"
+  "main": "js/md5.js",
+  "spm": {
+    "main": "js/md5.js"
+  }
 }