diff --git a/src/index.ts b/src/index.ts
index 8fdf6d4..26444ac 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -2,7 +2,12 @@ import wildcard from "wildcard";
 import mergeWith from "./merge-with";
 import joinArrays from "./join-arrays";
 import unique from "./unique";
-import { CustomizeRule, ICustomizeOptions, Key } from "./types";
+import {
+  CustomizeRule,
+  CustomizeRuleString,
+  ICustomizeOptions,
+  Key,
+} from "./types";
 import { isPlainObject, isUndefined } from "./utils";
 
 function merge<Configuration extends object>(
@@ -68,7 +73,9 @@ function mergeWithCustomize<Configuration extends object>(
   };
 }
 
-function customizeArray(rules: { [s: string]: CustomizeRule }) {
+function customizeArray(rules: {
+  [s: string]: CustomizeRule | CustomizeRuleString;
+}) {
   return (a: any, b: any, key: Key) => {
     const matchedRule =
       Object.keys(rules).find((rule) => wildcard(rule, key)) || "";
@@ -87,12 +94,12 @@ function customizeArray(rules: { [s: string]: CustomizeRule }) {
   };
 }
 
-type Rules = { [s: string]: CustomizeRule | Rules };
+type Rules = { [s: string]: CustomizeRule | CustomizeRuleString | Rules };
 
 function mergeWithRules(rules: Rules) {
   return mergeWithCustomize({
     customizeArray: (a: any, b: any, key: Key) => {
-      let currentRule: CustomizeRule | Rules = rules;
+      let currentRule: CustomizeRule | CustomizeRuleString | Rules = rules;
 
       key.split(".").forEach((k) => {
         if (!currentRule) {
@@ -122,7 +129,7 @@ function mergeWithRule({
   a,
   b,
 }: {
-  currentRule: CustomizeRule | Rules;
+  currentRule: CustomizeRule | CustomizeRuleString | Rules;
   a: any;
   b: any;
 }) {
@@ -159,10 +166,10 @@ function mergeWithRule({
       return matches;
     });
 
-    if(!isPlainObject(ao)){
+    if (!isPlainObject(ao)) {
       return ao;
     }
-    
+
     Object.entries(ao).forEach(([k, v]) => {
       const rule = currentRule;
 
@@ -278,7 +285,9 @@ function last(arr) {
   return arr[arr.length - 1];
 }
 
-function customizeObject(rules: { [s: string]: CustomizeRule }) {
+function customizeObject(rules: {
+  [s: string]: CustomizeRule | CustomizeRuleString;
+}) {
   return (a: any, b: any, key: Key) => {
     switch (rules[key]) {
       case CustomizeRule.Prepend:
diff --git a/src/types.ts b/src/types.ts
index 166ee67..99ef752 100644
--- a/src/types.ts
+++ b/src/types.ts
@@ -14,3 +14,10 @@ export enum CustomizeRule {
   Prepend = "prepend",
   Replace = "replace",
 }
+
+export type CustomizeRuleString =
+  | "match"
+  | "merge"
+  | "append"
+  | "prepend"
+  | "replace";
diff --git a/test/customize.test.ts b/test/customize.test.ts
index cc89eca..cd4f74d 100644
--- a/test/customize.test.ts
+++ b/test/customize.test.ts
@@ -19,6 +19,54 @@ describe("Merge strategy", function () {
 });
 
 function mergeStrategySpecificTests(merge) {
+  it("should work with nested arrays and string for append", function () {
+    const a = {
+      module: {
+        loaders: [
+          {
+            test: /.jsx?$/,
+            loaders: ["babel"],
+            exclude: /node_modules/,
+          },
+        ],
+      },
+    };
+    const b = {
+      module: {
+        loaders: [
+          {
+            test: /.jsx?$/,
+            loaders: ["react-hot"],
+            exclude: /node_modules/,
+          },
+        ],
+      },
+    };
+    const result = {
+      module: {
+        loaders: [
+          {
+            test: /.jsx?$/,
+            loaders: ["babel"],
+            exclude: /node_modules/,
+          },
+          {
+            test: /.jsx?$/,
+            loaders: ["react-hot"],
+            exclude: /node_modules/,
+          },
+        ],
+      },
+    };
+
+    assert.deepStrictEqual(
+      merge({
+        "module.loaders": "append",
+      })(a, b),
+      result
+    );
+  });
+
   it("should work with nested arrays and prepend", function () {
     const a = {
       module: {
@@ -67,6 +115,54 @@ function mergeStrategySpecificTests(merge) {
     );
   });
 
+  it("should work with nested arrays and string for prepend", function () {
+    const a = {
+      module: {
+        loaders: [
+          {
+            test: /.jsx?$/,
+            loaders: ["babel"],
+            exclude: /node_modules/,
+          },
+        ],
+      },
+    };
+    const b = {
+      module: {
+        loaders: [
+          {
+            test: /.jsx?$/,
+            loaders: ["react-hot"],
+            exclude: /node_modules/,
+          },
+        ],
+      },
+    };
+    const result = {
+      module: {
+        loaders: [
+          {
+            test: /.jsx?$/,
+            loaders: ["react-hot"],
+            exclude: /node_modules/,
+          },
+          {
+            test: /.jsx?$/,
+            loaders: ["babel"],
+            exclude: /node_modules/,
+          },
+        ],
+      },
+    };
+
+    assert.deepStrictEqual(
+      merge({
+        "module.loaders": "prepend",
+      })(a, b),
+      result
+    );
+  });
+
   it("should work with array wildcards", function () {
     const a = {
       entry: {
@@ -95,4 +191,33 @@ function mergeStrategySpecificTests(merge) {
       result
     );
   });
+
+  it("should work with array wildcards and string for replace", function () {
+    const a = {
+      entry: {
+        main: ["./src\\config\\main.ts"],
+        polyfills: ["./src\\config\\polyfills.ts"],
+        styles: ["./src\\assets\\styles\\styles.sass"],
+      },
+    };
+    const b = {
+      entry: {
+        main: ["./src\\config\\main.playground.ts"],
+      },
+    };
+    const result = {
+      entry: {
+        main: ["./src\\config\\main.playground.ts"],
+        polyfills: ["./src\\config\\polyfills.ts"],
+        styles: ["./src\\assets\\styles\\styles.sass"],
+      },
+    };
+
+    assert.deepStrictEqual(
+      merge({
+        "entry.*": "replace",
+      })(a, b),
+      result
+    );
+  });
 }