diff --git a/package.json b/package.json
index b74397fc..8c99687d 100644
--- a/package.json
+++ b/package.json
@@ -32,12 +32,14 @@
   },
   "peerDependencies": {
     "history": "^4.7.2",
-    "immutable": "^3.8.1 || ^4.0.0-rc.1",
     "lodash.isequalwith": "^4.4.0",
     "react": "^16.4.0",
     "react-redux": "^6.0.0 || ^7.1.0",
     "react-router": "^4.3.1 || ^5.0.0",
-    "redux": "^3.6.0 || ^4.0.0",
+    "redux": "^3.6.0 || ^4.0.0"
+  },
+  "optionalDependencies": {
+    "immutable": "^3.8.1 || ^4.0.0-rc.1",
     "seamless-immutable": "^7.1.3"
   },
   "devDependencies": {
diff --git a/yarn.lock b/yarn.lock
index c4a0da8d..de51bb58 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -3589,7 +3589,7 @@ immutable@^3.8.1:
   resolved "https://registry.yarnpkg.com/immutable/-/immutable-3.8.2.tgz#c2439951455bb39913daf281376f1530e104adf3"
   integrity sha1-wkOZUUVbs5kT2vKBN28VMOEErfM=
 
-immutable@^4.0.0-rc.12:
+"immutable@^3.8.1 || ^4.0.0-rc.1":
   version "4.0.0-rc.12"
   resolved "https://registry.yarnpkg.com/immutable/-/immutable-4.0.0-rc.12.tgz#ca59a7e4c19ae8d9bf74a97bdf0f6e2f2a5d0217"
   integrity sha512-0M2XxkZLx/mi3t8NVwIm1g8nHoEmM9p9UBl/G9k4+hm0kBgOVdMV/B3CY5dQ8qG8qc80NN4gDV4HQv6FTJ5q7A==