diff --git a/openapi-generator-annotations/lib/src/openapi_generator_annotations_base.dart b/openapi-generator-annotations/lib/src/openapi_generator_annotations_base.dart
index d7c73ac..866bf55 100644
--- a/openapi-generator-annotations/lib/src/openapi_generator_annotations_base.dart
+++ b/openapi-generator-annotations/lib/src/openapi_generator_annotations_base.dart
@@ -111,6 +111,9 @@ class Openapi {
   /// Include in depth logging output from run commands.
   final bool debugLogging;
 
+  /// Whether to disable updating the timestamp in the annotated file.
+  final bool updateAnnotatedFileTimestamp;
+
   const Openapi({
     this.additionalProperties,
     this.skipSpecValidation = false,
@@ -129,6 +132,7 @@ class Openapi {
     this.cachePath,
     this.projectPubspecPath,
     this.debugLogging = false,
+    this.updateAnnotatedFileTimestamp = true,
   });
 }
 
diff --git a/openapi-generator/lib/src/models/generator_arguments.dart b/openapi-generator/lib/src/models/generator_arguments.dart
index 2cbcbba..2c26da8 100644
--- a/openapi-generator/lib/src/models/generator_arguments.dart
+++ b/openapi-generator/lib/src/models/generator_arguments.dart
@@ -84,6 +84,9 @@ class GeneratorArguments {
   /// Customizes the way inline schema are handled.
   final InlineSchemaOptions? inlineSchemaOptions;
 
+  /// Whether to update the timestamp in the annotated file
+  final bool updateAnnotatedFileTimestamp;
+
   GeneratorArguments({required src_gen.ConstantReader annotations})
       : templateDirectory = annotations.readPropertyOrNull('templateDirectory'),
         generator =
@@ -112,7 +115,9 @@ class GeneratorArguments {
             '${Directory.current.path}${Platform.pathSeparator}pubspec.yaml'),
         isDebug = annotations.readPropertyOrDefault('debugLogging', false),
         inputSpec =
-            annotations.readPropertyOrDefault('inputSpec', InputSpec.json());
+            annotations.readPropertyOrDefault('inputSpec', InputSpec.json()),
+        updateAnnotatedFileTimestamp = annotations.readPropertyOrDefault(
+            'updateAnnotatedFileTimestamp', true);
 
   /// The stringified name of the [Generator].
   String get generatorName => generator == Generator.dart
diff --git a/openapi-generator/lib/src/openapi_generator_runner.dart b/openapi-generator/lib/src/openapi_generator_runner.dart
index c92a140..a4f72ea 100755
--- a/openapi-generator/lib/src/openapi_generator_runner.dart
+++ b/openapi-generator/lib/src/openapi_generator_runner.dart
@@ -220,24 +220,27 @@ class OpenapiGenerator extends GeneratorForAnnotation<annots.Openapi> {
           ),
         ),
       );
-      await updateAnnotatedFile(annotatedPath: annotatedPath).then(
-        (_) => logOutputMessage(
-          log: log,
-          communication: OutputMessage(
-            message: 'Successfully updated annotated file.',
-            level: Level.CONFIG,
+
+      if (args.updateAnnotatedFileTimestamp) {
+        await updateAnnotatedFile(annotatedPath: annotatedPath).then(
+          (_) => logOutputMessage(
+            log: log,
+            communication: OutputMessage(
+              message: 'Successfully updated annotated file.',
+              level: Level.CONFIG,
+            ),
           ),
-        ),
-        onError: (e, st) => logOutputMessage(
-          log: log,
-          communication: OutputMessage(
-            message: 'Failed to update annotated class file.',
-            level: Level.WARNING,
-            additionalContext: e,
-            stackTrace: st,
+          onError: (e, st) => logOutputMessage(
+            log: log,
+            communication: OutputMessage(
+              message: 'Failed to update annotated class file.',
+              level: Level.WARNING,
+              additionalContext: e,
+              stackTrace: st,
+            ),
           ),
-        ),
-      );
+        );
+      }
     }
     return '';
   }