diff --git a/chopper_generator/CHANGELOG.md b/chopper_generator/CHANGELOG.md
index c6c3e8aa..41173021 100644
--- a/chopper_generator/CHANGELOG.md
+++ b/chopper_generator/CHANGELOG.md
@@ -1,5 +1,10 @@
 # Changelog
 
+## 4.0.2
+
+- Analyzer dependency upgrade
+- PartValueFile nullability fix
+
 ## 4.0.1
 
 - Fix for the null safety support
diff --git a/chopper_generator/lib/src/generator.dart b/chopper_generator/lib/src/generator.dart
index cadcfcbc..40f722f6 100644
--- a/chopper_generator/lib/src/generator.dart
+++ b/chopper_generator/lib/src/generator.dart
@@ -456,7 +456,7 @@ class ChopperGenerator extends GeneratorForAnnotation<chopper.ChopperApi> {
       ];
 
       list.add(
-        refer('PartValueFile<${p.type.getDisplayString(withNullability: false)}>')
+        refer('PartValueFile<${p.type.getDisplayString(withNullability: p.type.isNullable)}>')
             .newInstance(params),
       );
     });
diff --git a/chopper_generator/pubspec.yaml b/chopper_generator/pubspec.yaml
index f399b818..708c683c 100644
--- a/chopper_generator/pubspec.yaml
+++ b/chopper_generator/pubspec.yaml
@@ -1,6 +1,6 @@
 name: chopper_generator
 description: Chopper is an http client generator using source_gen, inspired by Retrofit
-version: 4.0.1
+version: 4.0.2
 documentation: https://hadrien-lejard.gitbook.io/chopper
 repository: https://github.com/lejard-h/chopper
 author: Hadrien Lejard <hadrien.lejard@gmail.com>
@@ -9,7 +9,7 @@ environment:
   sdk: ">=2.12.0 <3.0.0"
 
 dependencies:
-  analyzer: ^1.2.0
+  analyzer: ^2.0.0
   build: ^2.0.0
   built_collection: ^5.0.0
   chopper: ^4.0.0