diff --git a/packages/redux-devtools-serialize/package.json b/packages/redux-devtools-serialize/package.json
index 9c8e7474..f99fba1e 100644
--- a/packages/redux-devtools-serialize/package.json
+++ b/packages/redux-devtools-serialize/package.json
@@ -35,6 +35,7 @@
     "jsan": "^3.1.13"
   },
   "devDependencies": {
+    "@types/jsan": "^3.1.0",
     "immutable": "^4.0.0-rc.12"
   },
   "peerDependencies": {
diff --git a/packages/redux-devtools-serialize/src/jsan.ts b/packages/redux-devtools-serialize/src/jsan.ts
deleted file mode 100644
index 9b295e7b..00000000
--- a/packages/redux-devtools-serialize/src/jsan.ts
+++ /dev/null
@@ -1,30 +0,0 @@
-declare module 'jsan' {
-  export interface Options {
-    date?: boolean;
-    function?: boolean;
-    regex?: boolean;
-    undefined?: boolean;
-    error?: boolean;
-    symbol?: boolean;
-    map?: boolean;
-    set?: boolean;
-    nan?: boolean;
-    infinity?: boolean;
-    refs?: boolean;
-  }
-
-  export function stringify(
-    value: unknown,
-    replacer?: (
-      key: string,
-      value: unknown
-    ) => unknown | (number | string)[] | null,
-    space?: string | number,
-    _options?: Options | boolean
-  ): string;
-
-  export function parse(
-    text: string,
-    reviver?: (key: string, value: unknown) => unknown
-  ): unknown;
-}
diff --git a/yarn.lock b/yarn.lock
index 009a2c8d..91b29d61 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -3190,6 +3190,11 @@
     jest-diff "^25.2.1"
     pretty-format "^25.2.1"
 
+"@types/jsan@^3.1.0":
+  version "3.1.0"
+  resolved "https://registry.yarnpkg.com/@types/jsan/-/jsan-3.1.0.tgz#128fdb14a102134ede764b11682e795d1b380c43"
+  integrity sha512-V5wfm0++TqM92D0ZkAhl9MDQHPTi88fXhMNVin5LV/Y3RnuU/FUv6wML4Vt/amZmPN9WaFTmDhKW+h58kAFmIg==
+
 "@types/json-schema@^7.0.3", "@types/json-schema@^7.0.4":
   version "7.0.5"
   resolved "https://registry.yarnpkg.com/@types/json-schema/-/json-schema-7.0.5.tgz#dcce4430e64b443ba8945f0290fb564ad5bac6dd"