diff --git a/packages/apps-config/src/api/chain/galois.ts b/packages/apps-config/src/api/chain/galois.ts
deleted file mode 100644
index 3ceba2b664..0000000000
--- a/packages/apps-config/src/api/chain/galois.ts
+++ /dev/null
@@ -1,53 +0,0 @@
-// Copyright 2017-2021 @polkadot/apps-config authors & contributors
-// SPDX-License-Identifier: Apache-2.0
-
-// structs need to be in order
-/* eslint-disable sort-keys */
-
-export default {
-  Address: 'MultiAddress',
-  LookupSource: 'MultiAddress',
-  RefCount: 'u8',
-  Account: {
-    nonce: 'U256',
-    balance: 'U256'
-  },
-  Transaction: {
-    nonce: 'U256',
-    action: 'String',
-    gas_price: 'u64',
-    gas_limit: 'u64',
-    value: 'U256',
-    input: 'Vec<u8>',
-    signature: 'Signature'
-  },
-  Signature: {
-    v: 'u64',
-    r: 'H256',
-    s: 'H256'
-  },
-  ExitReason: 'U256',
-  AccountServiceEnum: {
-    _enum: {
-      Nickname: 'String',
-      Ethereum: 'H160'
-    }
-  },
-  MultiAddressDetails: {
-    nickname: 'AccountServiceEnum',
-    ethereum: 'AccountServiceEnum'
-  },
-  Nickname: 'String',
-  Ethereum: 'H160',
-  TransferAmountInfo: {
-    date: 'u64',
-    daily_info: 'Balance',
-    monthly_info: 'Balance',
-    yearly_info: 'Balance'
-  },
-  AccountLimit: {
-    daily_limit: 'Balance',
-    monthly_limit: 'Balance',
-    yearly_limit: 'Balance'
-  }
-};
diff --git a/packages/apps-config/src/api/chain/index.ts b/packages/apps-config/src/api/chain/index.ts
index 96a43259f6..30df06da64 100644
--- a/packages/apps-config/src/api/chain/index.ts
+++ b/packages/apps-config/src/api/chain/index.ts
@@ -1,11 +1,9 @@
 // Copyright 2017-2021 @polkadot/apps-config authors & contributors
 // SPDX-License-Identifier: Apache-2.0
 
-import Galois from './galois';
 import Phala from './phala';
 
 // alphabetical, based on the actual displayed name
 export default {
-  Galois: Galois,
   'Phala PoC-3': Phala
 };
diff --git a/packages/apps-config/src/api/spec/galois.ts b/packages/apps-config/src/api/spec/galois.ts
new file mode 100644
index 0000000000..212fb6e96d
--- /dev/null
+++ b/packages/apps-config/src/api/spec/galois.ts
@@ -0,0 +1,66 @@
+// Copyright 2017-2021 @polkadot/apps-config authors & contributors
+// SPDX-License-Identifier: Apache-2.0
+
+import type { OverrideBundleDefinition } from '@polkadot/types/types';
+
+// structs need to be in order
+/* eslint-disable sort-keys */
+
+const definitions: OverrideBundleDefinition = {
+  types: [
+    {
+      // on all versions
+      minmax: [0, undefined],
+      types: {
+        Address: 'MultiAddress',
+        LookupSource: 'MultiAddress',
+        Balance: 'u128',
+        RefCount: 'u32',
+        Account: {
+          nonce: 'U256',
+          balance: 'U256'
+        },
+        Transaction: {
+          nonce: 'U256',
+          action: 'String',
+          gas_price: 'u64',
+          gas_limit: 'u64',
+          value: 'U256',
+          input: 'Vec<u8>',
+          signature: 'Signature'
+        },
+        Signature: {
+          v: 'u64',
+          r: 'H256',
+          s: 'H256'
+        },
+        ExitReason: 'U256',
+        AccountServiceEnum: {
+          _enum: {
+            Nickname: 'String',
+            Ethereum: 'H160'
+          }
+        },
+        MultiAddressDetails: {
+          nickname: 'AccountServiceEnum',
+          ethereum: 'AccountServiceEnum'
+        },
+        Nickname: 'String',
+        Ethereum: 'H160',
+        TransferAmountInfo: {
+          date: 'u64',
+          daily_info: 'Balance',
+          monthly_info: 'Balance',
+          yearly_info: 'Balance'
+        },
+        AccountLimit: {
+          daily_limit: 'Balance',
+          monthly_limit: 'Balance',
+          yearly_limit: 'Balance'
+        }
+      }
+    }
+  ]
+};
+
+export default definitions;
diff --git a/packages/apps-config/src/api/spec/index.ts b/packages/apps-config/src/api/spec/index.ts
index ffbbcfd56d..f3446e4ab5 100644
--- a/packages/apps-config/src/api/spec/index.ts
+++ b/packages/apps-config/src/api/spec/index.ts
@@ -28,6 +28,7 @@ import encointerNodeNotee from './encointer-node-notee';
 import encointerNodeTeeproxy from './encointer-node-teeproxy';
 import encointerPara from './encointer-para';
 import equilibrium from './equilibrium';
+import galois from './galois';
 import hanonycash from './hanonycash';
 import hydrate from './hydrate';
 import idavoll from './idavoll';
@@ -105,6 +106,7 @@ const spec: Record<string, OverrideBundleDefinition> = {
   litentry,
   mandala: acala,
   'mashnet-node': kilt,
+  'mathchain-galois': galois,
   'moonbase-alphanet': moonbeam,
   moonbeam,
   'moonbeam-standalone': moonbeam,