diff --git a/modules/openapi-generator/src/main/resources/typescript/model/ObjectSerializer.mustache b/modules/openapi-generator/src/main/resources/typescript/model/ObjectSerializer.mustache
index e208ed076120..d4cc5ce27ed1 100644
--- a/modules/openapi-generator/src/main/resources/typescript/model/ObjectSerializer.mustache
+++ b/modules/openapi-generator/src/main/resources/typescript/model/ObjectSerializer.mustache
@@ -24,6 +24,9 @@ let primitives = [
 
 const supportedMediaTypes: { [mediaType: string]: number } = {
   "application/json": Infinity,
+  "application/json-patch+json": 1,
+  "application/merge-patch+json": 1,
+  "application/strategic-merge-patch+json": 1,
   "application/octet-stream": 0,
   "application/x-www-form-urlencoded": 0
 }
@@ -225,7 +228,7 @@ export class ObjectSerializer {
             return String(data);
         }
 
-        if (mediaType === "application/json") {
+        if (mediaType === "application/json" || mediaType === "application/json-patch+json" || mediaType === "application/merge-patch+json" || mediaType === "application/strategic-merge-patch+json") {
             return JSON.stringify(data);
         }
 
@@ -244,7 +247,7 @@ export class ObjectSerializer {
             return rawData;
         }
 
-        if (mediaType === "application/json") {
+        if (mediaType === "application/json" || mediaType === "application/json-patch+json" || mediaType === "application/merge-patch+json" || mediaType === "application/strategic-merge-patch+json") {
             return JSON.parse(rawData);
         }
 
diff --git a/samples/client/others/typescript/builds/with-unique-items/models/ObjectSerializer.ts b/samples/client/others/typescript/builds/with-unique-items/models/ObjectSerializer.ts
index 9961638ce229..6d4db8b98668 100644
--- a/samples/client/others/typescript/builds/with-unique-items/models/ObjectSerializer.ts
+++ b/samples/client/others/typescript/builds/with-unique-items/models/ObjectSerializer.ts
@@ -16,6 +16,9 @@ let primitives = [
 
 const supportedMediaTypes: { [mediaType: string]: number } = {
   "application/json": Infinity,
+  "application/json-patch+json": 1,
+  "application/merge-patch+json": 1,
+  "application/strategic-merge-patch+json": 1,
   "application/octet-stream": 0,
   "application/x-www-form-urlencoded": 0
 }
@@ -197,7 +200,7 @@ export class ObjectSerializer {
             return String(data);
         }
 
-        if (mediaType === "application/json") {
+        if (mediaType === "application/json" || mediaType === "application/json-patch+json" || mediaType === "application/merge-patch+json" || mediaType === "application/strategic-merge-patch+json") {
             return JSON.stringify(data);
         }
 
@@ -216,7 +219,7 @@ export class ObjectSerializer {
             return rawData;
         }
 
-        if (mediaType === "application/json") {
+        if (mediaType === "application/json" || mediaType === "application/json-patch+json" || mediaType === "application/merge-patch+json" || mediaType === "application/strategic-merge-patch+json") {
             return JSON.parse(rawData);
         }
 
diff --git a/samples/openapi3/client/petstore/typescript/builds/browser/models/ObjectSerializer.ts b/samples/openapi3/client/petstore/typescript/builds/browser/models/ObjectSerializer.ts
index c2f808acfe5d..d93655eca068 100644
--- a/samples/openapi3/client/petstore/typescript/builds/browser/models/ObjectSerializer.ts
+++ b/samples/openapi3/client/petstore/typescript/builds/browser/models/ObjectSerializer.ts
@@ -26,6 +26,9 @@ let primitives = [
 
 const supportedMediaTypes: { [mediaType: string]: number } = {
   "application/json": Infinity,
+  "application/json-patch+json": 1,
+  "application/merge-patch+json": 1,
+  "application/strategic-merge-patch+json": 1,
   "application/octet-stream": 0,
   "application/x-www-form-urlencoded": 0
 }
@@ -214,7 +217,7 @@ export class ObjectSerializer {
             return String(data);
         }
 
-        if (mediaType === "application/json") {
+        if (mediaType === "application/json" || mediaType === "application/json-patch+json" || mediaType === "application/merge-patch+json" || mediaType === "application/strategic-merge-patch+json") {
             return JSON.stringify(data);
         }
 
@@ -233,7 +236,7 @@ export class ObjectSerializer {
             return rawData;
         }
 
-        if (mediaType === "application/json") {
+        if (mediaType === "application/json" || mediaType === "application/json-patch+json" || mediaType === "application/merge-patch+json" || mediaType === "application/strategic-merge-patch+json") {
             return JSON.parse(rawData);
         }
 
diff --git a/samples/openapi3/client/petstore/typescript/builds/composed-schemas/models/ObjectSerializer.ts b/samples/openapi3/client/petstore/typescript/builds/composed-schemas/models/ObjectSerializer.ts
index 42ea776f16cf..b1beacef71f0 100644
--- a/samples/openapi3/client/petstore/typescript/builds/composed-schemas/models/ObjectSerializer.ts
+++ b/samples/openapi3/client/petstore/typescript/builds/composed-schemas/models/ObjectSerializer.ts
@@ -28,6 +28,9 @@ let primitives = [
 
 const supportedMediaTypes: { [mediaType: string]: number } = {
   "application/json": Infinity,
+  "application/json-patch+json": 1,
+  "application/merge-patch+json": 1,
+  "application/strategic-merge-patch+json": 1,
   "application/octet-stream": 0,
   "application/x-www-form-urlencoded": 0
 }
@@ -219,7 +222,7 @@ export class ObjectSerializer {
             return String(data);
         }
 
-        if (mediaType === "application/json") {
+        if (mediaType === "application/json" || mediaType === "application/json-patch+json" || mediaType === "application/merge-patch+json" || mediaType === "application/strategic-merge-patch+json") {
             return JSON.stringify(data);
         }
 
@@ -238,7 +241,7 @@ export class ObjectSerializer {
             return rawData;
         }
 
-        if (mediaType === "application/json") {
+        if (mediaType === "application/json" || mediaType === "application/json-patch+json" || mediaType === "application/merge-patch+json" || mediaType === "application/strategic-merge-patch+json") {
             return JSON.parse(rawData);
         }
 
diff --git a/samples/openapi3/client/petstore/typescript/builds/default/models/ObjectSerializer.ts b/samples/openapi3/client/petstore/typescript/builds/default/models/ObjectSerializer.ts
index c2f808acfe5d..d93655eca068 100644
--- a/samples/openapi3/client/petstore/typescript/builds/default/models/ObjectSerializer.ts
+++ b/samples/openapi3/client/petstore/typescript/builds/default/models/ObjectSerializer.ts
@@ -26,6 +26,9 @@ let primitives = [
 
 const supportedMediaTypes: { [mediaType: string]: number } = {
   "application/json": Infinity,
+  "application/json-patch+json": 1,
+  "application/merge-patch+json": 1,
+  "application/strategic-merge-patch+json": 1,
   "application/octet-stream": 0,
   "application/x-www-form-urlencoded": 0
 }
@@ -214,7 +217,7 @@ export class ObjectSerializer {
             return String(data);
         }
 
-        if (mediaType === "application/json") {
+        if (mediaType === "application/json" || mediaType === "application/json-patch+json" || mediaType === "application/merge-patch+json" || mediaType === "application/strategic-merge-patch+json") {
             return JSON.stringify(data);
         }
 
@@ -233,7 +236,7 @@ export class ObjectSerializer {
             return rawData;
         }
 
-        if (mediaType === "application/json") {
+        if (mediaType === "application/json" || mediaType === "application/json-patch+json" || mediaType === "application/merge-patch+json" || mediaType === "application/strategic-merge-patch+json") {
             return JSON.parse(rawData);
         }
 
diff --git a/samples/openapi3/client/petstore/typescript/builds/deno/models/ObjectSerializer.ts b/samples/openapi3/client/petstore/typescript/builds/deno/models/ObjectSerializer.ts
index fb17977f530d..1fff95395cd9 100644
--- a/samples/openapi3/client/petstore/typescript/builds/deno/models/ObjectSerializer.ts
+++ b/samples/openapi3/client/petstore/typescript/builds/deno/models/ObjectSerializer.ts
@@ -26,6 +26,9 @@ let primitives = [
 
 const supportedMediaTypes: { [mediaType: string]: number } = {
   "application/json": Infinity,
+  "application/json-patch+json": 1,
+  "application/merge-patch+json": 1,
+  "application/strategic-merge-patch+json": 1,
   "application/octet-stream": 0,
   "application/x-www-form-urlencoded": 0
 }
@@ -214,7 +217,7 @@ export class ObjectSerializer {
             return String(data);
         }
 
-        if (mediaType === "application/json") {
+        if (mediaType === "application/json" || mediaType === "application/json-patch+json" || mediaType === "application/merge-patch+json" || mediaType === "application/strategic-merge-patch+json") {
             return JSON.stringify(data);
         }
 
@@ -233,7 +236,7 @@ export class ObjectSerializer {
             return rawData;
         }
 
-        if (mediaType === "application/json") {
+        if (mediaType === "application/json" || mediaType === "application/json-patch+json" || mediaType === "application/merge-patch+json" || mediaType === "application/strategic-merge-patch+json") {
             return JSON.parse(rawData);
         }
 
diff --git a/samples/openapi3/client/petstore/typescript/builds/inversify/models/ObjectSerializer.ts b/samples/openapi3/client/petstore/typescript/builds/inversify/models/ObjectSerializer.ts
index c2f808acfe5d..d93655eca068 100644
--- a/samples/openapi3/client/petstore/typescript/builds/inversify/models/ObjectSerializer.ts
+++ b/samples/openapi3/client/petstore/typescript/builds/inversify/models/ObjectSerializer.ts
@@ -26,6 +26,9 @@ let primitives = [
 
 const supportedMediaTypes: { [mediaType: string]: number } = {
   "application/json": Infinity,
+  "application/json-patch+json": 1,
+  "application/merge-patch+json": 1,
+  "application/strategic-merge-patch+json": 1,
   "application/octet-stream": 0,
   "application/x-www-form-urlencoded": 0
 }
@@ -214,7 +217,7 @@ export class ObjectSerializer {
             return String(data);
         }
 
-        if (mediaType === "application/json") {
+        if (mediaType === "application/json" || mediaType === "application/json-patch+json" || mediaType === "application/merge-patch+json" || mediaType === "application/strategic-merge-patch+json") {
             return JSON.stringify(data);
         }
 
@@ -233,7 +236,7 @@ export class ObjectSerializer {
             return rawData;
         }
 
-        if (mediaType === "application/json") {
+        if (mediaType === "application/json" || mediaType === "application/json-patch+json" || mediaType === "application/merge-patch+json" || mediaType === "application/strategic-merge-patch+json") {
             return JSON.parse(rawData);
         }
 
diff --git a/samples/openapi3/client/petstore/typescript/builds/jquery/models/ObjectSerializer.ts b/samples/openapi3/client/petstore/typescript/builds/jquery/models/ObjectSerializer.ts
index c2f808acfe5d..d93655eca068 100644
--- a/samples/openapi3/client/petstore/typescript/builds/jquery/models/ObjectSerializer.ts
+++ b/samples/openapi3/client/petstore/typescript/builds/jquery/models/ObjectSerializer.ts
@@ -26,6 +26,9 @@ let primitives = [
 
 const supportedMediaTypes: { [mediaType: string]: number } = {
   "application/json": Infinity,
+  "application/json-patch+json": 1,
+  "application/merge-patch+json": 1,
+  "application/strategic-merge-patch+json": 1,
   "application/octet-stream": 0,
   "application/x-www-form-urlencoded": 0
 }
@@ -214,7 +217,7 @@ export class ObjectSerializer {
             return String(data);
         }
 
-        if (mediaType === "application/json") {
+        if (mediaType === "application/json" || mediaType === "application/json-patch+json" || mediaType === "application/merge-patch+json" || mediaType === "application/strategic-merge-patch+json") {
             return JSON.stringify(data);
         }
 
@@ -233,7 +236,7 @@ export class ObjectSerializer {
             return rawData;
         }
 
-        if (mediaType === "application/json") {
+        if (mediaType === "application/json" || mediaType === "application/json-patch+json" || mediaType === "application/merge-patch+json" || mediaType === "application/strategic-merge-patch+json") {
             return JSON.parse(rawData);
         }
 
diff --git a/samples/openapi3/client/petstore/typescript/builds/object_params/models/ObjectSerializer.ts b/samples/openapi3/client/petstore/typescript/builds/object_params/models/ObjectSerializer.ts
index c2f808acfe5d..d93655eca068 100644
--- a/samples/openapi3/client/petstore/typescript/builds/object_params/models/ObjectSerializer.ts
+++ b/samples/openapi3/client/petstore/typescript/builds/object_params/models/ObjectSerializer.ts
@@ -26,6 +26,9 @@ let primitives = [
 
 const supportedMediaTypes: { [mediaType: string]: number } = {
   "application/json": Infinity,
+  "application/json-patch+json": 1,
+  "application/merge-patch+json": 1,
+  "application/strategic-merge-patch+json": 1,
   "application/octet-stream": 0,
   "application/x-www-form-urlencoded": 0
 }
@@ -214,7 +217,7 @@ export class ObjectSerializer {
             return String(data);
         }
 
-        if (mediaType === "application/json") {
+        if (mediaType === "application/json" || mediaType === "application/json-patch+json" || mediaType === "application/merge-patch+json" || mediaType === "application/strategic-merge-patch+json") {
             return JSON.stringify(data);
         }
 
@@ -233,7 +236,7 @@ export class ObjectSerializer {
             return rawData;
         }
 
-        if (mediaType === "application/json") {
+        if (mediaType === "application/json" || mediaType === "application/json-patch+json" || mediaType === "application/merge-patch+json" || mediaType === "application/strategic-merge-patch+json") {
             return JSON.parse(rawData);
         }