diff --git a/CHANGELOG.md b/CHANGELOG.md
index b93f973cf7..c904c00341 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,7 @@
+## [4.1.7] - 2023.10.15
+### Changed
+- `TatumUtils` chainId <-> `Network` mappings always return usable value or throw error for ease of use.
+
 ## [4.1.6] - 2023.10.15
 ### Added
 - `TatumUtils` added with access to chainId <-> `Network` mapping
diff --git a/package.json b/package.json
index 4f1df886e7..0e38a0cdca 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@tatumio/tatum",
-  "version": "4.1.6",
+  "version": "4.1.7",
   "description": "Tatum JS SDK",
   "author": "Tatum",
   "repository": "https://github.com/tatumio/tatum-js",
diff --git a/src/e2e/tatum.spec.ts b/src/e2e/tatum.spec.ts
index 6aca730b3f..f77c8b337e 100644
--- a/src/e2e/tatum.spec.ts
+++ b/src/e2e/tatum.spec.ts
@@ -51,7 +51,7 @@ describe('Network to chainId mapping check', () => {
       const chainId = TatumUtils.getChainId(network)
 
       expect(chainId).toBeGreaterThan(0)
-      expect(TatumUtils.getNetwork(chainId as number)).toBe(network)
+      expect(TatumUtils.getNetwork(chainId)).toBe(network)
     })
   }
 })
diff --git a/src/util/tatum.utils.ts b/src/util/tatum.utils.ts
index 231c8ab52d..1f5e40b3ed 100644
--- a/src/util/tatum.utils.ts
+++ b/src/util/tatum.utils.ts
@@ -2,17 +2,21 @@ import { Network } from '../dto'
 import { Constant } from './constant'
 
 export const TatumUtils = {
-  getChainId: (network: Network): number | undefined => {
+  getChainId: (network: Network): number => {
     if (network in Constant.NETWORK.ChainId) {
       return Constant.NETWORK.ChainId[network as keyof typeof Constant.NETWORK.ChainId]
     }
-    return undefined
+    throw new Error(`Tatum Network to ChainId for network ${network} does not exist`)
   },
-  getNetwork: (chainId: number): keyof typeof Constant.NETWORK.ChainId | undefined => {
+  getNetwork: (chainId: number): Network => {
     if (Object.keys(chainIdToNetworkCache).length === 0) {
       buildChainIdToNetworkCache()
     }
-    return chainIdToNetworkCache[chainId] || undefined
+    const network = chainIdToNetworkCache[chainId]
+    if (!network) {
+      throw new Error(`ChainId to Tatum Network for chainId ${chainId} does not exist`)
+    }
+    return network
   },
 }