diff --git a/package.json b/package.json
index e590100..ce0fec2 100644
--- a/package.json
+++ b/package.json
@@ -53,6 +53,6 @@
     "tape": "4.5.1"
   },
   "dependencies": {
-    "immutable": "^3.7.4"
+    "immutable": "~3.7.4"
   }
 }