diff --git a/packages/rpc-provider/src/coder/decodeResponse.spec.ts b/packages/rpc-provider/src/coder/decodeResponse.spec.ts
index c4198bc423..b08fbb86da 100644
--- a/packages/rpc-provider/src/coder/decodeResponse.spec.ts
+++ b/packages/rpc-provider/src/coder/decodeResponse.spec.ts
@@ -48,6 +48,18 @@ describe('decodeResponse', (): void => {
     ).toThrow(/123: test error: Some random error description/);
   });
 
+  it('allows for number subscription ids', (): void => {
+    expect(
+      coder.decodeResponse({ id: 1, jsonrpc: '2.0', method: 'test', params: { result: 'test result', subscription: 1 } } as JsonRpcResponse)
+    ).toEqual('test result');
+  });
+
+  it('allows for string subscription ids', (): void => {
+    expect(
+      coder.decodeResponse({ id: 1, jsonrpc: '2.0', method: 'test', params: { result: 'test result', subscription: 'abc' } } as JsonRpcResponse)
+    ).toEqual('test result');
+  });
+
   it('returns the result', (): void => {
     expect(
       coder.decodeResponse({ id: 1, jsonrpc: '2.0', result: 'some result' } as JsonRpcResponse)
diff --git a/packages/rpc-provider/src/coder/index.ts b/packages/rpc-provider/src/coder/index.ts
index 34e5c0f895..fc676b57f2 100644
--- a/packages/rpc-provider/src/coder/index.ts
+++ b/packages/rpc-provider/src/coder/index.ts
@@ -30,7 +30,7 @@ export default class RpcCoder {
 
     const isSubscription = !isUndefined(response.params) && !isUndefined(response.method);
 
-    assert(isNumber(response.id) || (isSubscription && isNumber(response.params.subscription)), 'Invalid id field in decoded object');
+    assert(isNumber(response.id) || (isSubscription && (isNumber(response.params.subscription) || isString(response.params.subscription))), 'Invalid id field in decoded object');
 
     this._checkError(response.error);
 
diff --git a/packages/rpc-provider/src/types.ts b/packages/rpc-provider/src/types.ts
index c2e8346a7c..c1f198ace8 100644
--- a/packages/rpc-provider/src/types.ts
+++ b/packages/rpc-provider/src/types.ts
@@ -28,7 +28,7 @@ interface JsonRpcResponseSubscription {
   params: {
     error?: JsonRpcResponseBaseError;
     result: unknown;
-    subscription: number;
+    subscription: number | string;
   };
 }