diff --git a/CHANGES.txt b/CHANGES.txt
index 9c8c840..f0d5cf8 100644
--- a/CHANGES.txt
+++ b/CHANGES.txt
@@ -1,3 +1,6 @@
+1.11.1 (May XX, 2024)
+ - Bugfixing - Fixed error when calling `selectTreatmentValue` and `selectTreatmentWithConfig` selectors with an object as a key, caused by the key not being stringified correctly.
+
 1.11.0 (April 3, 2024)
  - Added `sideEffects: false` property in the package.json file to allow tree shaking.
  - Updated Redux-Thunk peer dependency range to include redux-thunk@3.x.x.
diff --git a/package-lock.json b/package-lock.json
index 76d7aff..da60e1b 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "@splitsoftware/splitio-redux",
-  "version": "1.11.0",
+  "version": "1.11.1-rc.0",
   "lockfileVersion": 2,
   "requires": true,
   "packages": {
     "": {
       "name": "@splitsoftware/splitio-redux",
-      "version": "1.11.0",
+      "version": "1.11.1-rc.0",
       "license": "Apache-2.0",
       "dependencies": {
         "@splitsoftware/splitio": "10.25.2",
diff --git a/package.json b/package.json
index 87d07c6..eb8e732 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@splitsoftware/splitio-redux",
-  "version": "1.11.0",
+  "version": "1.11.1-rc.0",
   "description": "A library to easily use Split JS SDK with Redux and React Redux",
   "main": "lib/index.js",
   "module": "es/index.js",
diff --git a/src/__tests__/selectors.test.ts b/src/__tests__/selectors.test.ts
index d7deec3..f2a1fbf 100644
--- a/src/__tests__/selectors.test.ts
+++ b/src/__tests__/selectors.test.ts
@@ -20,6 +20,9 @@ describe('selectTreatmentValue', () => {
   it('returns the treatment value of the given feature flag name and key', () => {
     /** The treatment value for the USER_1 key for SPLIT_1 is 'off' */
     expect(selectTreatmentValue(STATE_READY.splitio, SPLIT_2, USER_1)).toBe(OFF);
+    // Using a key object
+    expect(selectTreatmentValue(STATE_READY.splitio, SPLIT_2, { matchingKey: USER_1, bucketingKey: 'some_bucket' })).toBe(OFF); // @ts-expect-error bucketingKey is not in SplitKey type, but it's not used in the selector
+    expect(selectTreatmentValue(STATE_READY.splitio, SPLIT_2, { matchingKey: USER_1 })).toBe(OFF);
   });
 
   it('returns "control" value if the given feature flag name or key are invalid (were not evaluated with getTreatment, or returned "control"', () => {
@@ -46,6 +49,8 @@ describe('selectTreatmentWithConfig', () => {
 
   it('returns the treatment of the given feature flag name and key', () => {
     expect(selectTreatmentWithConfig(STATE_READY.splitio, SPLIT_2, USER_1)).toBe(STATE_READY.splitio.treatments[SPLIT_2][USER_1]);
+    // Using a key object
+    expect(selectTreatmentWithConfig(STATE_READY.splitio, SPLIT_2, { matchingKey: USER_1, bucketingKey: 'some_bucket' })).toBe(STATE_READY.splitio.treatments[SPLIT_2][USER_1]);
   });
 
   it('returns "control" treatment if the given feature flag name or key are invalid (were not evaluated with getTreatment, or returned "control")', () => {
@@ -54,7 +59,7 @@ describe('selectTreatmentWithConfig', () => {
   });
 
   it('returns the passed default treatment insteaad of "control" if the given feature flag name or key are invalid', () => {
-    const DEFAULT_TREATMENT = {treatment: 'some_value', config: 'some_config'};
+    const DEFAULT_TREATMENT = { treatment: 'some_value', config: 'some_config' };
 
     expect(selectTreatmentWithConfig(STATE_READY.splitio, SPLIT_1, USER_INVALID, DEFAULT_TREATMENT)).toBe(DEFAULT_TREATMENT);
     expect(selectTreatmentWithConfig(STATE_READY.splitio, SPLIT_INVALID, USER_1, DEFAULT_TREATMENT)).toBe(DEFAULT_TREATMENT);
diff --git a/src/selectors.ts b/src/selectors.ts
index ef0683f..25ca3d0 100644
--- a/src/selectors.ts
+++ b/src/selectors.ts
@@ -1,5 +1,6 @@
 import { ISplitState } from './types';
 import { CONTROL, CONTROL_WITH_CONFIG, DEFAULT_SPLIT_STATE_SLICE, ERROR_SELECTOR_NO_SPLITSTATE } from './constants';
+import { matching } from './utils';
 
 export const getStateSlice = (sliceName: string) => (state: any) => state[sliceName];
 
@@ -30,7 +31,7 @@ export function selectTreatmentWithConfig(splitState: ISplitState, featureFlagNa
   const treatment =
     splitTreatments ?
       key ?
-        splitTreatments[key.toString()] :
+        splitTreatments[matching(key)] :
         Object.values(splitTreatments)[0] :
       undefined;