diff --git a/src/index.ts b/src/index.ts
index ea918b4..f65a51f 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -2,5 +2,5 @@ export * from './generators'
 export * from './random'
 export { default } from './random'
 export * from './rng'
-export * from './rng-factory'
 export type * from './types'
+export * from './utils'
diff --git a/src/random.ts b/src/random.ts
index 99bf5a4..14c5dee 100644
--- a/src/random.ts
+++ b/src/random.ts
@@ -14,7 +14,7 @@ import { uniform } from './distributions/uniform'
 import { uniformBoolean } from './distributions/uniform-boolean'
 import { uniformInt } from './distributions/uniform-int'
 import { MathRandomRNG } from './generators/math-random'
-import { RNGFactory } from './rng-factory'
+import { createRNG } from './utils'
 
 /**
  * Distribution function
@@ -47,8 +47,9 @@ export class Random {
   protected readonly _cache: {
     [k: string]: ICacheEntry<any>
   } = {}
+
   constructor(seedOrRNG: SeedOrRNG = new MathRandomRNG()) {
-    this._rng = RNGFactory(seedOrRNG)
+    this._rng = createRNG(seedOrRNG)
   }
 
   /**
@@ -81,7 +82,7 @@ export class Random {
    * ```
    */
   use(seedOrRNG: SeedOrRNG) {
-    this._rng = RNGFactory(seedOrRNG)
+    this._rng = createRNG(seedOrRNG)
   }
 
   // --------------------------------------------------------------------------
diff --git a/src/rng-factory.ts b/src/rng-factory.ts
deleted file mode 100644
index 6d9592f..0000000
--- a/src/rng-factory.ts
+++ /dev/null
@@ -1,22 +0,0 @@
-import type { SeedOrRNG } from './types'
-import { ARC4RNG } from './generators/arc4'
-import { FunctionRNG } from './generators/function'
-import { RNG } from './rng'
-
-export const RNGFactory = (seedOrRNG?: SeedOrRNG) => {
-  switch (typeof seedOrRNG) {
-    case 'object':
-      if (seedOrRNG instanceof RNG) {
-        return seedOrRNG
-      }
-      break
-
-    case 'function':
-      return new FunctionRNG(seedOrRNG)
-
-    default:
-      return new ARC4RNG(seedOrRNG)
-  }
-
-  throw new Error(`invalid RNG seed or instance "${seedOrRNG}"`)
-}
diff --git a/src/utils.ts b/src/utils.ts
index 727e2bd..9312c44 100644
--- a/src/utils.ts
+++ b/src/utils.ts
@@ -1,4 +1,25 @@
-import type { Seed } from './types'
+import type { Seed, SeedOrRNG } from './types'
+import { ARC4RNG } from './generators/arc4'
+import { FunctionRNG } from './generators/function'
+import { RNG } from './rng'
+
+export function createRNG(seedOrRNG?: SeedOrRNG) {
+  switch (typeof seedOrRNG) {
+    case 'object':
+      if (seedOrRNG instanceof RNG) {
+        return seedOrRNG
+      }
+      break
+
+    case 'function':
+      return new FunctionRNG(seedOrRNG)
+
+    default:
+      return new ARC4RNG(seedOrRNG)
+  }
+
+  throw new Error(`invalid RNG seed or instance "${seedOrRNG}"`)
+}
 
 export function processSeed(seed?: Seed): number {
   if (seed === undefined) {