diff --git a/package-lock.json b/package-lock.json
index 5162942..183eccc 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -9,12 +9,10 @@
       "version": "1.4.6",
       "license": "SEE LICENSE IN LICENSE.txt",
       "dependencies": {
-        "lodash.isequal": "4.5.0",
         "lodash.omit": "4.5.0",
         "vscode-extension-telemetry": "^0.1.7"
       },
       "devDependencies": {
-        "@types/lodash.isequal": "^4.5.5",
         "@types/lodash.omit": "^4.5.6",
         "@types/mocha": "^10.0.10",
         "@types/node": "^22.0.0",
@@ -570,16 +568,6 @@
       "dev": true,
       "license": "MIT"
     },
-    "node_modules/@types/lodash.isequal": {
-      "version": "4.5.5",
-      "resolved": "https://registry.npmjs.org/@types/lodash.isequal/-/lodash.isequal-4.5.5.tgz",
-      "integrity": "sha512-4IKbinG7MGP131wRfceK6W4E/Qt3qssEFLF30LnJbjYiSfHGGRU/Io8YxXrZX109ir+iDETC8hw8QsDijukUVg==",
-      "dev": true,
-      "license": "MIT",
-      "dependencies": {
-        "@types/lodash": "*"
-      }
-    },
     "node_modules/@types/lodash.omit": {
       "version": "4.5.6",
       "resolved": "https://registry.npmjs.org/@types/lodash.omit/-/lodash.omit-4.5.6.tgz",
@@ -2383,11 +2371,6 @@
       "dev": true,
       "license": "MIT"
     },
-    "node_modules/lodash.isequal": {
-      "version": "4.5.0",
-      "resolved": "https://registry.npmjs.org/lodash.isequal/-/lodash.isequal-4.5.0.tgz",
-      "license": "MIT"
-    },
     "node_modules/lodash.omit": {
       "version": "4.5.0",
       "resolved": "https://registry.npmjs.org/lodash.omit/-/lodash.omit-4.5.0.tgz",
diff --git a/package.json b/package.json
index 4d2f1dd..83212c8 100644
--- a/package.json
+++ b/package.json
@@ -193,7 +193,6 @@
     "vscode:postpublish": "./tools/tag-release/main.sh"
   },
   "dependencies": {
-    "lodash.isequal": "4.5.0",
     "lodash.omit": "4.5.0",
     "vscode-extension-telemetry": "^0.1.7"
   },
@@ -204,7 +203,6 @@
     }
   },
   "devDependencies": {
-    "@types/lodash.isequal": "^4.5.5",
     "@types/lodash.omit": "^4.5.6",
     "@types/mocha": "^10.0.10",
     "@types/node": "^22.0.0",
diff --git a/src/lib/normalisation-rule-store.ts b/src/lib/normalisation-rule-store.ts
index 68ef1ec..0581d0b 100644
--- a/src/lib/normalisation-rule-store.ts
+++ b/src/lib/normalisation-rule-store.ts
@@ -1,6 +1,6 @@
 import WorkspaceAdaptor from './adaptors/workspace';
 import {LoadedNormalisationRule, SavedNormalisationRule} from './types/normalisation-rule';
-const isEqual = require('lodash.isequal');
+import {isDeepStrictEqual} from 'util';
 const omit = require('lodash.omit');
 
 const clone = (value: any) => JSON.parse(JSON.stringify(value));
@@ -28,7 +28,7 @@ export default class NormalisationRuleStore {
 
     getAllRules(): LoadedNormalisationRule[] {
         const newBaseRules = this.workspace.get<SavedNormalisationRule[]>('preComparisonTextNormalizationRules');
-        if (!isEqual(newBaseRules, this.baseRules)) {
+        if (!isDeepStrictEqual(clone(newBaseRules), this.baseRules)) {
             this.setupRules(newBaseRules);
         }
         return this.rules!;