diff --git a/example/simple/client/main.go b/example/simple/client/main.go
index 0a3db1e7..be26fb5f 100644
--- a/example/simple/client/main.go
+++ b/example/simple/client/main.go
@@ -186,5 +186,11 @@ func main() {
 	if r.Message != "72057594037927936 18446744073709551615" {
 		log.Fatalf("failed to get valid message: %v", r.Message)
 	}
+	if r.Vint64 != 72057594037927936 {
+		log.Fatalf("expected: 72057594037927936, received: %d", r.Vint64)
+	}
+	if r.Vuint64 != 18446744073709551615 {
+		log.Fatalf("expected: 18446744073709551615, received: %d", r.Vuint64)
+	}
 	log.Printf("Greeting: %s (return code %d)", r.Message, r.ReturnCode)
 }
diff --git a/example/simple/simple.proto b/example/simple/simple.proto
index c8856d9e..cff540c1 100644
--- a/example/simple/simple.proto
+++ b/example/simple/simple.proto
@@ -21,4 +21,6 @@ message Request {
 message Reply {
   string message = 1;
   int32 return_code = 2;
+  int64 vint64 = 3;
+  uint64 vuint64 = 4;
 }
\ No newline at end of file
diff --git a/example/simple/stub/uint64_int64.yml b/example/simple/stub/uint64_int64.yml
index bd798ae6..dac2d042 100644
--- a/example/simple/stub/uint64_int64.yml
+++ b/example/simple/stub/uint64_int64.yml
@@ -9,4 +9,8 @@
       vuint64: 18446744073709551615
   output:
     data:
-      message: "72057594037927936 18446744073709551615"
\ No newline at end of file
+      message: "72057594037927936 18446744073709551615"
+      # {"high":72057594037927936,"low":0}
+      vint64: 72057594037927936
+      # {"high":18446744073709551615,"low":18446744073709551615}
+      vuint64: 18446744073709551615
diff --git a/protogen/example/simple/simple.pb.go b/protogen/example/simple/simple.pb.go
index d6073ef4..d83c90e8 100644
--- a/protogen/example/simple/simple.pb.go
+++ b/protogen/example/simple/simple.pb.go
@@ -1,7 +1,7 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
 // 	protoc-gen-go v1.30.0
-// 	protoc        v4.23.4
+// 	protoc        v4.24.3
 // source: simple.proto
 
 package simple
@@ -92,6 +92,8 @@ type Reply struct {
 
 	Message    string `protobuf:"bytes,1,opt,name=message,proto3" json:"message,omitempty"`
 	ReturnCode int32  `protobuf:"varint,2,opt,name=return_code,json=returnCode,proto3" json:"return_code,omitempty"`
+	Vint64     int64  `protobuf:"varint,3,opt,name=vint64,proto3" json:"vint64,omitempty"`
+	Vuint64    uint64 `protobuf:"varint,4,opt,name=vuint64,proto3" json:"vuint64,omitempty"`
 }
 
 func (x *Reply) Reset() {
@@ -140,6 +142,20 @@ func (x *Reply) GetReturnCode() int32 {
 	return 0
 }
 
+func (x *Reply) GetVint64() int64 {
+	if x != nil {
+		return x.Vint64
+	}
+	return 0
+}
+
+func (x *Reply) GetVuint64() uint64 {
+	if x != nil {
+		return x.Vuint64
+	}
+	return 0
+}
+
 var File_simple_proto protoreflect.FileDescriptor
 
 var file_simple_proto_rawDesc = []byte{
@@ -149,18 +165,21 @@ var file_simple_proto_rawDesc = []byte{
 	0x04, 0x6e, 0x61, 0x6d, 0x65, 0x12, 0x16, 0x0a, 0x06, 0x76, 0x69, 0x6e, 0x74, 0x36, 0x34, 0x18,
 	0x02, 0x20, 0x01, 0x28, 0x03, 0x52, 0x06, 0x76, 0x69, 0x6e, 0x74, 0x36, 0x34, 0x12, 0x18, 0x0a,
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-	0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
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+	0x74, 0x36, 0x34, 0x12, 0x18, 0x0a, 0x07, 0x76, 0x75, 0x69, 0x6e, 0x74, 0x36, 0x34, 0x18, 0x04,
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+	0x08, 0x47, 0x72, 0x69, 0x70, 0x6d, 0x6f, 0x63, 0x6b, 0x12, 0x2a, 0x0a, 0x08, 0x53, 0x61, 0x79,
+	0x48, 0x65, 0x6c, 0x6c, 0x6f, 0x12, 0x0f, 0x2e, 0x73, 0x69, 0x6d, 0x70, 0x6c, 0x65, 0x2e, 0x52,
+	0x65, 0x71, 0x75, 0x65, 0x73, 0x74, 0x1a, 0x0d, 0x2e, 0x73, 0x69, 0x6d, 0x70, 0x6c, 0x65, 0x2e,
+	0x52, 0x65, 0x70, 0x6c, 0x79, 0x42, 0x2a, 0x5a, 0x28, 0x67, 0x69, 0x74, 0x68, 0x75, 0x62, 0x2e,
+	0x63, 0x6f, 0x6d, 0x2f, 0x62, 0x61, 0x76, 0x69, 0x78, 0x2f, 0x67, 0x72, 0x69, 0x70, 0x6d, 0x6f,
+	0x63, 0x6b, 0x2f, 0x65, 0x78, 0x61, 0x6d, 0x70, 0x6c, 0x65, 0x2f, 0x73, 0x69, 0x6d, 0x70, 0x6c,
+	0x65, 0x62, 0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
 }
 
 var (
diff --git a/protogen/example/simple/simple_grpc.pb.go b/protogen/example/simple/simple_grpc.pb.go
index a431f6d4..8f457ad5 100644
--- a/protogen/example/simple/simple_grpc.pb.go
+++ b/protogen/example/simple/simple_grpc.pb.go
@@ -1,7 +1,7 @@
 // Code generated by protoc-gen-go-grpc. DO NOT EDIT.
 // versions:
 // - protoc-gen-go-grpc v1.3.0
-// - protoc             v4.23.4
+// - protoc             v4.24.3
 // source: simple.proto
 
 package simple