diff --git a/mobile/openapi/lib/model/system_config_generated_fullsize_image_dto.dart b/mobile/openapi/lib/model/system_config_generated_fullsize_image_dto.dart
index f36105f59..e7111771b 100644
Binary files a/mobile/openapi/lib/model/system_config_generated_fullsize_image_dto.dart and b/mobile/openapi/lib/model/system_config_generated_fullsize_image_dto.dart differ
diff --git a/mobile/openapi/lib/model/system_config_generated_image_dto.dart b/mobile/openapi/lib/model/system_config_generated_image_dto.dart
index 7dd5b2be7..a46fc13d2 100644
Binary files a/mobile/openapi/lib/model/system_config_generated_image_dto.dart and b/mobile/openapi/lib/model/system_config_generated_image_dto.dart differ
diff --git a/open-api/immich-openapi-specs.json b/open-api/immich-openapi-specs.json
index 1129dd486..5f133b4f8 100644
--- a/open-api/immich-openapi-specs.json
+++ b/open-api/immich-openapi-specs.json
@@ -22625,6 +22625,7 @@
             ]
           },
           "progressive": {
+            "default": false,
             "type": "boolean"
           },
           "quality": {
@@ -22636,7 +22637,6 @@
         "required": [
           "enabled",
           "format",
-          "progressive",
           "quality"
         ],
         "type": "object"
@@ -22651,6 +22651,7 @@
             ]
           },
           "progressive": {
+            "default": false,
             "type": "boolean"
           },
           "quality": {
@@ -22665,7 +22666,6 @@
         },
         "required": [
           "format",
-          "progressive",
           "quality",
           "size"
         ],
diff --git a/open-api/typescript-sdk/src/fetch-client.ts b/open-api/typescript-sdk/src/fetch-client.ts
index a6bbf5cdd..52f6621d9 100644
--- a/open-api/typescript-sdk/src/fetch-client.ts
+++ b/open-api/typescript-sdk/src/fetch-client.ts
@@ -1538,12 +1538,12 @@ export type SystemConfigFFmpegDto = {
 export type SystemConfigGeneratedFullsizeImageDto = {
     enabled: boolean;
     format: ImageFormat;
-    progressive: boolean;
+    progressive?: boolean;
     quality: number;
 };
 export type SystemConfigGeneratedImageDto = {
     format: ImageFormat;
-    progressive: boolean;
+    progressive?: boolean;
     quality: number;
     size: number;
 };
diff --git a/server/src/controllers/system-config.controller.spec.ts b/server/src/controllers/system-config.controller.spec.ts
index 48b8c1bcf..bbd1241dc 100644
--- a/server/src/controllers/system-config.controller.spec.ts
+++ b/server/src/controllers/system-config.controller.spec.ts
@@ -70,5 +70,33 @@ describe(SystemConfigController.name, () => {
         expect(body).toEqual(errorDto.badRequest(['nightlyTasks.databaseCleanup must be a boolean value']));
       });
     });
+
+    describe('image', () => {
+      it('should accept config without optional progressive property', async () => {
+        const config = _.cloneDeep(defaults);
+        delete config.image.thumbnail.progressive;
+        delete config.image.preview.progressive;
+        delete config.image.fullsize.progressive;
+        const { status } = await request(ctx.getHttpServer()).put('/system-config').send(config);
+        expect(status).toBe(200);
+      });
+
+      it('should accept config with progressive set to true', async () => {
+        const config = _.cloneDeep(defaults);
+        config.image.thumbnail.progressive = true;
+        config.image.preview.progressive = true;
+        config.image.fullsize.progressive = true;
+        const { status } = await request(ctx.getHttpServer()).put('/system-config').send(config);
+        expect(status).toBe(200);
+      });
+
+      it('should reject invalid progressive value', async () => {
+        const config = _.cloneDeep(defaults);
+        (config.image.thumbnail.progressive as any) = 'invalid';
+        const { status, body } = await request(ctx.getHttpServer()).put('/system-config').send(config);
+        expect(status).toBe(400);
+        expect(body).toEqual(errorDto.badRequest(['image.thumbnail.progressive must be a boolean value']));
+      });
+    });
   });
 });
diff --git a/server/src/dtos/system-config.dto.ts b/server/src/dtos/system-config.dto.ts
index 4301d7193..b0d5a0646 100644
--- a/server/src/dtos/system-config.dto.ts
+++ b/server/src/dtos/system-config.dto.ts
@@ -586,8 +586,8 @@ class SystemConfigGeneratedImageDto {
   @ApiProperty({ type: 'integer' })
   size!: number;
 
-  @ValidateBoolean()
-  progressive!: boolean;
+  @ValidateBoolean({ optional: true, default: false })
+  progressive?: boolean;
 }
 
 class SystemConfigGeneratedFullsizeImageDto {
@@ -604,8 +604,8 @@ class SystemConfigGeneratedFullsizeImageDto {
   @ApiProperty({ type: 'integer' })
   quality!: number;
 
-  @ValidateBoolean()
-  progressive!: boolean;
+  @ValidateBoolean({ optional: true, default: false })
+  progressive?: boolean;
 }
 
 export class SystemConfigImageDto {
diff --git a/server/src/types.ts b/server/src/types.ts
index 9f8c8011e..f851ebd99 100644
--- a/server/src/types.ts
+++ b/server/src/types.ts
@@ -36,14 +36,14 @@ export type FullsizeImageOptions = {
   format: ImageFormat;
   quality: number;
   enabled: boolean;
-  progressive: boolean;
+  progressive?: boolean;
 };
 
 export type ImageOptions = {
   format: ImageFormat;
   quality: number;
   size: number;
-  progressive: boolean;
+  progressive?: boolean;
 };
 
 export type RawImageInfo = {