diff --git a/package.json b/package.json
index 838e48a..bd2f8c6 100644
--- a/package.json
+++ b/package.json
@@ -40,7 +40,7 @@
     "simplify"
   ],
   "dependencies": {
-    "@netcracker/qubership-apihub-json-crawl": "1.0.4",
+    "@netcracker/qubership-apihub-json-crawl": "feature-support-oas-extension-changes-classification",
     "object-hash": "3.0.0",
     "fast-equals": "4.0.3"
   },
diff --git a/src/rules/openapi.ts b/src/rules/openapi.ts
index 3baccd5..d4bd02b 100644
--- a/src/rules/openapi.ts
+++ b/src/rules/openapi.ts
@@ -244,21 +244,17 @@ const OPEN_API_COMPONENTS_REPLACES: Record<string, ReplaceMapping> = {
   [OPEN_API_PROPERTY_EXAMPLES]: TO_EMPTY_OBJECT_MAPPING,
 }
 
-const openApiExtensionRulesFunction: (elseRules: NormalizationRules | (() => NormalizationRules)) => NormalizationRules = (elseRules) => ({
-  '/*': (ctx) => {
-    const { key } = ctx
-    return typeof key === 'string' && key.startsWith('x-')
-      ? {
-        isExtension: true,
-        validate: checkType(...TYPE_JSON_ANY),
-        merge: resolvers.last,
-        '/**': { validate: checkType(...TYPE_JSON_ANY) },
-      }
-      : typeof elseRules === 'function' ? elseRules() : elseRules
-  },
-})
-
-const openApiExtensionRules: NormalizationRules = openApiExtensionRulesFunction({ validate: () => false })
+const openApiSpecificationExtensionRules = {
+  '/^': {
+    'x-': {
+      isExtension: true,
+      validate: checkType(...TYPE_JSON_ANY),
+      merge: resolvers.last,
+      '/*': { validate: checkType(...TYPE_JSON_ANY) },
+      '/**': { validate: checkType(...TYPE_JSON_ANY) },
+    },
+  },  
+} as NormalizationRules
 
 const openApiExternalDocsRules: NormalizationRules = {
   '/externalDocs': {
@@ -266,7 +262,7 @@ const openApiExternalDocsRules: NormalizationRules = {
     merge: resolvers.last,
     '/description': { validate: checkType(TYPE_STRING) },
     '/url': { validate: checkType(TYPE_STRING) },
-    ...openApiExtensionRules,
+    ...openApiSpecificationExtensionRules,
   },
 }
 
@@ -282,9 +278,8 @@ const openApiExamplesRules: NormalizationRules = {
     validate: checkType(TYPE_OBJECT),
     merge: resolvers.last,
     '/*': {
-      ...openApiExtensionRulesFunction({
-        validate: checkType(...TYPE_JSON_ANY),
-      }),
+      '/*': { validate: checkType(...TYPE_JSON_ANY) },
+      ...openApiSpecificationExtensionRules,
     },
     '/**': { validate: checkType(...TYPE_JSON_ANY) },
   },
@@ -306,12 +301,12 @@ const openApiServerRules: NormalizationRules = {
       },
       '/default': { validate: checkType(TYPE_STRING) },
       '/description': { validate: checkType(TYPE_STRING) },
-      ...openApiExtensionRules,
+      ...openApiSpecificationExtensionRules,
       validate: checkType(TYPE_OBJECT),
     },
     validate: checkType(TYPE_OBJECT),
   },
-  ...openApiExtensionRules,
+  ...openApiSpecificationExtensionRules,
   validate: checkType(TYPE_OBJECT),
 }
 
@@ -350,7 +345,7 @@ const openApiLinksRules: NormalizationRules = {
     },
     '/description': { validate: checkType(TYPE_STRING) },
     '/server': openApiServerRules,
-    ...openApiExtensionRules,
+    ...openApiSpecificationExtensionRules,
     validate: checkType(TYPE_OBJECT),
   },
   validate: checkType(TYPE_OBJECT),
@@ -363,8 +358,9 @@ const openApiJsonSchemaExtensionRules = (): NormalizationRules => ({
     unify: [
       valueDefaults(OPEN_API_XML_DEFAULTS),
     ],
-    ...openApiExtensionRulesFunction({ validate: checkType(...TYPE_JSON_ANY) }),
+    '/*': { validate: checkType(...TYPE_JSON_ANY) },    
     '/**': { validate: checkType(...TYPE_JSON_ANY) },
+    ...openApiSpecificationExtensionRules,
   },
   '/discriminator': {
     validate: checkType(TYPE_OBJECT),
@@ -383,7 +379,7 @@ const openApiJsonSchemaExtensionRules = (): NormalizationRules => ({
     },
   },
   ...openApiExternalDocsRules,
-  ...openApiExtensionRules,
+  ...openApiSpecificationExtensionRules,
 })
 
 const customFor30JsonSchemaRulesFactory = (): NormalizationRules => {
@@ -488,11 +484,11 @@ const openApiMediaTypesRules = (version: OpenApiSpecVersion): NormalizationRules
           valueReplaces(OPEN_API_ENCODING_REPLACES),
         ],
         validate: checkType(TYPE_OBJECT),
-        ...openApiExtensionRules,
+        ...openApiSpecificationExtensionRules,
       },
       validate: checkType(TYPE_OBJECT),
     },
-    ...openApiExtensionRules,
+    ...openApiSpecificationExtensionRules,
     unify: [
       valueDefaults(OPEN_API_MEDIA_TYPE_DEFAULTS),
       valueReplaces(OPEN_API_MEDIA_TYPE_REPLACES),
@@ -520,7 +516,7 @@ const openApiHeadersRules = (version: OpenApiSpecVersion): NormalizationRules =>
     ...openApiExampleRules,
     ...openApiExamplesRules,
     '/schema': openApiJsonSchemaRules(version),
-    ...openApiExtensionRules,
+    ...openApiSpecificationExtensionRules,
     validate: checkType(TYPE_OBJECT),
     unify: [
       valueDefaults(OPEN_API_HEADER_DEFAULTS),
@@ -580,7 +576,7 @@ const openApiParametersRules = (version: OpenApiSpecVersion): NormalizationRules
       ...openApiJsonSchemaRules(version),
       newDataLayer: true,
     }),
-    ...openApiExtensionRules,
+    ...openApiSpecificationExtensionRules,
     validate: checkType(TYPE_OBJECT),
     unify: [
       valueDefaults(OPEN_API_PARAMETER_DEFAULTS),
@@ -596,7 +592,7 @@ const openApiRequestRules = (version: OpenApiSpecVersion): NormalizationRules =>
   '/description': { validate: checkType(TYPE_STRING) },
   '/required': { validate: checkType(TYPE_BOOLEAN) },
   '/content': openApiMediaTypesRules(version),
-  ...openApiExtensionRules,
+  ...openApiSpecificationExtensionRules,
   unify: [
     valueDefaults(OPEN_API_REQUEST_BODY_DEFAULTS),
   ],
@@ -607,12 +603,12 @@ const openApiRequestRules = (version: OpenApiSpecVersion): NormalizationRules =>
 })
 
 const openApiResponsesRules = (version: OpenApiSpecVersion): NormalizationRules => ({
-  ...openApiExtensionRulesFunction({
+  '/*': {
     '/description': { validate: checkType(TYPE_STRING) },
     '/headers': openApiHeadersRules(version),
     '/content': openApiMediaTypesRules(version),
     '/links': openApiLinksRules,
-    ...openApiExtensionRules,
+    ...openApiSpecificationExtensionRules,
     unify: [
       valueDefaults(OPEN_API_RESPONSE_DEFAULTS),
       valueReplaces(OPEN_API_RESPONSE_REPLACES),
@@ -621,7 +617,8 @@ const openApiResponsesRules = (version: OpenApiSpecVersion): NormalizationRules
     deprecation: {
       inlineDescriptionSuffixCalculator: ctx => `${ctx.suffix} '${ctx.key.toString()}'`,
     },
-  }),
+  },
+  ...openApiSpecificationExtensionRules,
   deprecation: { inlineDescriptionSuffixCalculator: () => 'in response' },
   validate: checkType(TYPE_OBJECT),
 })
@@ -634,7 +631,7 @@ const openApiPathItemRules = (version: OpenApiSpecVersion): NormalizationRules =
     '/*': openApiServerRules,
     validate: checkType(TYPE_ARRAY),
   },
-  ...openApiExtensionRulesFunction({
+  '/*': {
     deprecation: {
       deprecationResolver: (ctx) => OPEN_API_DEPRECATION_RESOLVER(ctx),
       descriptionCalculator: ctx => `[Deprecated] operation ${ctx.key.toString().toUpperCase()} ${ctx.suffix}`,
@@ -648,8 +645,9 @@ const openApiPathItemRules = (version: OpenApiSpecVersion): NormalizationRules =
     ...openApiExternalDocsRules,
     '/operationId': { validate: checkType(TYPE_STRING) },
     '/callbacks': {
-      '/*': {
-        ...openApiExtensionRulesFunction(() => openApiPathItemRules(version)),
+      '/*': {        
+        '/*': () => openApiPathItemRules(version),
+        ...openApiSpecificationExtensionRules,
       },
     },
     '/deprecated': { validate: checkType(TYPE_BOOLEAN) },
@@ -658,13 +656,14 @@ const openApiPathItemRules = (version: OpenApiSpecVersion): NormalizationRules =
     '/parameters': openApiParametersRules(version),
     '/requestBody': openApiRequestRules(version),
     '/responses': openApiResponsesRules(version),
-    ...openApiExtensionRules,
+    ...openApiSpecificationExtensionRules,
     unify: [
       valueDefaults(OPEN_API_OPERATION_DEFAULTS),
       valueReplaces(OPEN_API_OPERATION_REPLACES),
     ],
     validate: checkType(TYPE_OBJECT),
-  }),
+  },
+  ...openApiSpecificationExtensionRules,
   '/parameters': openApiParametersRules(version),
   validate: checkType(TYPE_OBJECT),
   unify: pathItemsUnification,
@@ -681,17 +680,17 @@ export const openApiRules = (version: OpenApiSpecVersion): NormalizationRules =>
       '/name': { validate: checkType(TYPE_STRING) },
       '/url': { validate: checkType(TYPE_STRING) },
       '/email': { validate: checkType(TYPE_STRING) },
-      ...openApiExtensionRules,
+      ...openApiSpecificationExtensionRules,
       validate: checkType(TYPE_OBJECT),
     },
     '/license': {
       '/name': { validate: checkType(TYPE_STRING) },
       '/url': { validate: checkType(TYPE_STRING) },
-      ...openApiExtensionRules,
+      ...openApiSpecificationExtensionRules,
       validate: checkType(TYPE_OBJECT),
     },
     '/version': { validate: checkType(TYPE_STRING) },
-    ...openApiExtensionRules,
+    ...openApiSpecificationExtensionRules,
     validate: checkType(TYPE_OBJECT),
   },
   ...openApiExternalDocsRules,
@@ -702,13 +701,14 @@ export const openApiRules = (version: OpenApiSpecVersion): NormalizationRules =>
       '/name': { validate: checkType(TYPE_STRING) },
       '/description': { validate: checkType(TYPE_STRING) },
       ...openApiExternalDocsRules,
-      ...openApiExtensionRules,
+      ...openApiSpecificationExtensionRules,
       validate: checkType(TYPE_OBJECT),
     },
     validate: checkType(TYPE_ARRAY),
   },
   '/paths': {
-    ...openApiExtensionRulesFunction(openApiPathItemRules(version)),
+    '/*': openApiPathItemRules(version),
+    ...openApiSpecificationExtensionRules,
     validate: checkType(TYPE_OBJECT),
   },
   '/components': {
@@ -725,21 +725,21 @@ export const openApiRules = (version: OpenApiSpecVersion): NormalizationRules =>
             '/authorizationUrl': { validate: checkType(TYPE_STRING) },
             '/refreshUrl': { validate: checkType(TYPE_STRING) },
             '/scopes': openApiOAuthScopesRules,
-            ...openApiExtensionRules,
+            ...openApiSpecificationExtensionRules,
             validate: checkType(TYPE_OBJECT),
           },
           '/password': {
             '/tokenUrl': { validate: checkType(TYPE_STRING) },
             '/refreshUrl': { validate: checkType(TYPE_STRING) },
             '/scopes': openApiOAuthScopesRules,
-            ...openApiExtensionRules,
+            ...openApiSpecificationExtensionRules,
             validate: checkType(TYPE_OBJECT),
           },
           '/clientCredentials': {
             '/tokenUrl': { validate: checkType(TYPE_STRING) },
             '/refreshUrl': { validate: checkType(TYPE_STRING) },
             '/scopes': openApiOAuthScopesRules,
-            ...openApiExtensionRules,
+            ...openApiSpecificationExtensionRules,
             validate: checkType(TYPE_OBJECT),
           },
           '/authorizationCode': {
@@ -747,15 +747,15 @@ export const openApiRules = (version: OpenApiSpecVersion): NormalizationRules =>
             '/tokenUrl': { validate: checkType(TYPE_STRING) },
             '/refreshUrl': { validate: checkType(TYPE_STRING) },
             '/scopes': openApiOAuthScopesRules,
-            ...openApiExtensionRules,
+            ...openApiSpecificationExtensionRules,
             validate: checkType(TYPE_OBJECT),
           },
-          ...openApiExtensionRules,
+          ...openApiSpecificationExtensionRules,
           validate: checkType(TYPE_OBJECT),
         },
         '/openIdConnectUrl': { validate: checkType(TYPE_STRING) },
         validate: checkType(TYPE_OBJECT),
-        ...openApiExtensionRules,
+        ...openApiSpecificationExtensionRules,
       },
       validate: checkType(TYPE_OBJECT),
     },
@@ -776,18 +776,19 @@ export const openApiRules = (version: OpenApiSpecVersion): NormalizationRules =>
     '/headers': openApiHeadersRules(version),
     '/callbacks': {
       '/*': {
-        ...openApiExtensionRulesFunction(() => openApiPathItemRules(version)),
+        '/*': () => openApiPathItemRules(version),
+        ...openApiSpecificationExtensionRules,
       },
     },
     ...openApiExamplesRules,
-    ...openApiExtensionRules,
+    ...openApiSpecificationExtensionRules,
     validate: checkType(TYPE_OBJECT),
     unify: [
       valueDefaults(OPEN_API_COMPONENTS_DEFAULTS),
       valueReplaces(OPEN_API_COMPONENTS_REPLACES),
     ],
   },
-  ...openApiExtensionRules,
+  ...openApiSpecificationExtensionRules,
   unify: [
     valueDefaults(OPEN_API_ROOT_DEFAULTS),
     valueReplaces(OPEN_API_ROOT_REPLACES),
diff --git a/test/oas/validate.test.ts b/test/oas/validate.test.ts
index 4ca578f..1a99b4a 100644
--- a/test/oas/validate.test.ts
+++ b/test/oas/validate.test.ts
@@ -650,4 +650,23 @@ describe('OAS 3.1 Type validations: array of types', () => {
 
     expect(result).toHaveProperty([...schemaPath, 'type'], 'string')
   })
+
+  it('validates OAS extensions of Paths Object with complex values', () => {
+    const spec = {
+      openapi: "3.0.4",
+      info: {
+        title: "Test API", 
+        version: "1.0.0"
+      },
+      paths: {
+        "x-custom-extension": {
+          key: "value"
+        }
+      }
+    }
+
+    const result = validate(spec, { validate: true, })
+
+    expect(result).toMatchObject(spec)
+  })
 })
\ No newline at end of file