diff --git a/package.json b/package.json
index a7cb7c8..bd2c558 100644
--- a/package.json
+++ b/package.json
@@ -29,6 +29,6 @@
   },
   "homepage": "https://github.com/ZeekInteractive/heisenberg",
   "dependencies": {
-    "foundation-sites": "^6.1.1"
+    "foundation-sites": "=6.1.1"
   }
 }