diff --git a/docs/proto/promo.proto b/docs/proto/promo.proto
index 296fc65..8d9540c 100644
--- a/docs/proto/promo.proto
+++ b/docs/proto/promo.proto
@@ -4,15 +4,13 @@ package codeword;
 
 option go_package = "./codeword_rpc";
 
-import "google/protobuf/empty.proto";
-
 message Time {
   int64 from = 1;
   int64 to = 2;
 }
 
 service PromoCodeService {
-  rpc GetAllPromoActivations(google.protobuf.Empty) returns (PromoActivationResp);
+  rpc GetAllPromoActivations(Time) returns (PromoActivationResp);
 }
 
 message PromoActivationResp {
diff --git a/internal/proto/codeword/promo.pb.go b/internal/proto/codeword/promo.pb.go
index 6666ec0..f8e1484 100644
--- a/internal/proto/codeword/promo.pb.go
+++ b/internal/proto/codeword/promo.pb.go
@@ -9,7 +9,6 @@ package codeword_rpc
 import (
 	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
 	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
-	emptypb "google.golang.org/protobuf/types/known/emptypb"
 	reflect "reflect"
 	sync "sync"
 )
@@ -229,40 +228,38 @@ var File_promo_proto protoreflect.FileDescriptor
 
 var file_promo_proto_rawDesc = []byte{
 	0x0a, 0x0b, 0x70, 0x72, 0x6f, 0x6d, 0x6f, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x12, 0x08, 0x63,
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+	0x70, 0x63, 0x62, 0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
 }
 
 var (
@@ -284,13 +281,12 @@ var file_promo_proto_goTypes = []interface{}{
 	(*PromoActivationResp_UserTime)(nil),    // 2: codeword.PromoActivationResp.UserTime
 	(*PromoActivationResp_Activations)(nil), // 3: codeword.PromoActivationResp.Activations
 	nil,                                     // 4: codeword.PromoActivationResp.ResponseEntry
-	(*emptypb.Empty)(nil),                   // 5: google.protobuf.Empty
 }
 var file_promo_proto_depIdxs = []int32{
 	4, // 0: codeword.PromoActivationResp.response:type_name -> codeword.PromoActivationResp.ResponseEntry
 	2, // 1: codeword.PromoActivationResp.Activations.values:type_name -> codeword.PromoActivationResp.UserTime
 	3, // 2: codeword.PromoActivationResp.ResponseEntry.value:type_name -> codeword.PromoActivationResp.Activations
-	5, // 3: codeword.PromoCodeService.GetAllPromoActivations:input_type -> google.protobuf.Empty
+	0, // 3: codeword.PromoCodeService.GetAllPromoActivations:input_type -> codeword.Time
 	1, // 4: codeword.PromoCodeService.GetAllPromoActivations:output_type -> codeword.PromoActivationResp
 	4, // [4:5] is the sub-list for method output_type
 	3, // [3:4] is the sub-list for method input_type
diff --git a/internal/proto/codeword/promo_grpc.pb.go b/internal/proto/codeword/promo_grpc.pb.go
index 1fabd5e..9e225c9 100644
--- a/internal/proto/codeword/promo_grpc.pb.go
+++ b/internal/proto/codeword/promo_grpc.pb.go
@@ -7,7 +7,6 @@ import (
 	grpc "google.golang.org/grpc"
 	codes "google.golang.org/grpc/codes"
 	status "google.golang.org/grpc/status"
-	emptypb "google.golang.org/protobuf/types/known/emptypb"
 )
 
 // This is a compile-time assertion to ensure that this generated file
@@ -19,7 +18,7 @@ const _ = grpc.SupportPackageIsVersion7
 //
 // For semantics around ctx use and closing/ending streaming RPCs, please refer to https://pkg.go.dev/google.golang.org/grpc/?tab=doc#ClientConn.NewStream.
 type PromoCodeServiceClient interface {
-	GetAllPromoActivations(ctx context.Context, in *emptypb.Empty, opts ...grpc.CallOption) (*PromoActivationResp, error)
+	GetAllPromoActivations(ctx context.Context, in *Time, opts ...grpc.CallOption) (*PromoActivationResp, error)
 }
 
 type promoCodeServiceClient struct {
@@ -30,7 +29,7 @@ func NewPromoCodeServiceClient(cc grpc.ClientConnInterface) PromoCodeServiceClie
 	return &promoCodeServiceClient{cc}
 }
 
-func (c *promoCodeServiceClient) GetAllPromoActivations(ctx context.Context, in *emptypb.Empty, opts ...grpc.CallOption) (*PromoActivationResp, error) {
+func (c *promoCodeServiceClient) GetAllPromoActivations(ctx context.Context, in *Time, opts ...grpc.CallOption) (*PromoActivationResp, error) {
 	out := new(PromoActivationResp)
 	err := c.cc.Invoke(ctx, "/codeword.PromoCodeService/GetAllPromoActivations", in, out, opts...)
 	if err != nil {
@@ -43,7 +42,7 @@ func (c *promoCodeServiceClient) GetAllPromoActivations(ctx context.Context, in
 // All implementations must embed UnimplementedPromoCodeServiceServer
 // for forward compatibility
 type PromoCodeServiceServer interface {
-	GetAllPromoActivations(context.Context, *emptypb.Empty) (*PromoActivationResp, error)
+	GetAllPromoActivations(context.Context, *Time) (*PromoActivationResp, error)
 	mustEmbedUnimplementedPromoCodeServiceServer()
 }
 
@@ -51,7 +50,7 @@ type PromoCodeServiceServer interface {
 type UnimplementedPromoCodeServiceServer struct {
 }
 
-func (UnimplementedPromoCodeServiceServer) GetAllPromoActivations(context.Context, *emptypb.Empty) (*PromoActivationResp, error) {
+func (UnimplementedPromoCodeServiceServer) GetAllPromoActivations(context.Context, *Time) (*PromoActivationResp, error) {
 	return nil, status.Errorf(codes.Unimplemented, "method GetAllPromoActivations not implemented")
 }
 func (UnimplementedPromoCodeServiceServer) mustEmbedUnimplementedPromoCodeServiceServer() {}
@@ -68,7 +67,7 @@ func RegisterPromoCodeServiceServer(s grpc.ServiceRegistrar, srv PromoCodeServic
 }
 
 func _PromoCodeService_GetAllPromoActivations_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
-	in := new(emptypb.Empty)
+	in := new(Time)
 	if err := dec(in); err != nil {
 		return nil, err
 	}
@@ -80,7 +79,7 @@ func _PromoCodeService_GetAllPromoActivations_Handler(srv interface{}, ctx conte
 		FullMethod: "/codeword.PromoCodeService/GetAllPromoActivations",
 	}
 	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
-		return srv.(PromoCodeServiceServer).GetAllPromoActivations(ctx, req.(*emptypb.Empty))
+		return srv.(PromoCodeServiceServer).GetAllPromoActivations(ctx, req.(*Time))
 	}
 	return interceptor(ctx, in, info, handler)
 }