diff --git a/services/api/grpc/handlers/receiver/abort.go b/services/api/grpc/handlers/receiver/abort.go
index d0464e0..3e4bdd1 100644
--- a/services/api/grpc/handlers/receiver/abort.go
+++ b/services/api/grpc/handlers/receiver/abort.go
@@ -1,4 +1,4 @@
-// Copyright © 2020 Attestant Limited.
+// Copyright © 2020, 2024 Attestant Limited.
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
 // You may obtain a copy of the License at
@@ -17,13 +17,13 @@ import (
 	context "context"
 
 	"github.com/attestantio/dirk/services/api/grpc/interceptors"
-	"github.com/golang/protobuf/ptypes/empty"
 	"github.com/pkg/errors"
 	pb "github.com/wealdtech/eth2-signer-api/pb/v1"
+	"google.golang.org/protobuf/types/known/emptypb"
 )
 
 // Abort handles the Abort() grpc call.
-func (h *Handler) Abort(ctx context.Context, req *pb.AbortRequest) (*empty.Empty, error) {
+func (h *Handler) Abort(ctx context.Context, req *pb.AbortRequest) (*emptypb.Empty, error) {
 	senderID := h.senderID(ctx)
 	if senderID == 0 {
 		log.Warn().Interface("client", ctx.Value(&interceptors.ClientName{})).Msg("Failed to obtain participant ID of sender")
@@ -37,5 +37,5 @@ func (h *Handler) Abort(ctx context.Context, req *pb.AbortRequest) (*empty.Empty
 	}
 
 	log.Trace().Msg("Completed abort successfully")
-	return &empty.Empty{}, nil
+	return &emptypb.Empty{}, nil
 }
diff --git a/services/api/grpc/handlers/receiver/execute.go b/services/api/grpc/handlers/receiver/execute.go
index 26c2bf6..b0b3365 100644
--- a/services/api/grpc/handlers/receiver/execute.go
+++ b/services/api/grpc/handlers/receiver/execute.go
@@ -1,4 +1,4 @@
-// Copyright © 2020 Attestant Limited.
+// Copyright © 2020, 2024 Attestant Limited.
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
 // You may obtain a copy of the License at
@@ -17,13 +17,13 @@ import (
 	context "context"
 
 	"github.com/attestantio/dirk/services/api/grpc/interceptors"
-	"github.com/golang/protobuf/ptypes/empty"
 	"github.com/pkg/errors"
 	pb "github.com/wealdtech/eth2-signer-api/pb/v1"
+	"google.golang.org/protobuf/types/known/emptypb"
 )
 
 // Execute handles the Execute() grpc call.
-func (h *Handler) Execute(ctx context.Context, req *pb.ExecuteRequest) (*empty.Empty, error) {
+func (h *Handler) Execute(ctx context.Context, req *pb.ExecuteRequest) (*emptypb.Empty, error) {
 	senderID := h.senderID(ctx)
 	if senderID == 0 {
 		log.Warn().Interface("client", ctx.Value(&interceptors.ClientName{})).Msg("Failed to obtain participant ID of sender")
@@ -38,5 +38,5 @@ func (h *Handler) Execute(ctx context.Context, req *pb.ExecuteRequest) (*empty.E
 	}
 
 	log.Trace().Msg("Completed execution successfully")
-	return &empty.Empty{}, nil
+	return &emptypb.Empty{}, nil
 }
diff --git a/services/api/grpc/handlers/receiver/prepare.go b/services/api/grpc/handlers/receiver/prepare.go
index eae6890..ffe8267 100644
--- a/services/api/grpc/handlers/receiver/prepare.go
+++ b/services/api/grpc/handlers/receiver/prepare.go
@@ -1,4 +1,4 @@
-// Copyright © 2020 Attestant Limited.
+// Copyright © 2020, 2024 Attestant Limited.
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
 // You may obtain a copy of the License at
@@ -19,13 +19,13 @@ import (
 
 	"github.com/attestantio/dirk/core"
 	"github.com/attestantio/dirk/services/api/grpc/interceptors"
-	"github.com/golang/protobuf/ptypes/empty"
 	"github.com/pkg/errors"
 	pb "github.com/wealdtech/eth2-signer-api/pb/v1"
+	"google.golang.org/protobuf/types/known/emptypb"
 )
 
 // Prepare handles the Prepare() grpc call.
-func (h *Handler) Prepare(ctx context.Context, req *pb.PrepareRequest) (*empty.Empty, error) {
+func (h *Handler) Prepare(ctx context.Context, req *pb.PrepareRequest) (*emptypb.Empty, error) {
 	senderID := h.senderID(ctx)
 	if senderID == 0 {
 		log.Warn().Interface("client", ctx.Value(&interceptors.ClientName{})).Msg("Failed to obtain participant ID of sender")
@@ -48,5 +48,5 @@ func (h *Handler) Prepare(ctx context.Context, req *pb.PrepareRequest) (*empty.E
 	}
 
 	log.Trace().Msg("Completed preparation successfully")
-	return &empty.Empty{}, nil
+	return &emptypb.Empty{}, nil
 }
diff --git a/services/api/grpc/interceptors/clientinfo.go b/services/api/grpc/interceptors/clientinfo.go
index 104a92d..d316e2a 100644
--- a/services/api/grpc/interceptors/clientinfo.go
+++ b/services/api/grpc/interceptors/clientinfo.go
@@ -28,7 +28,7 @@ type ClientName struct{}
 
 // ClientInfoInterceptor adds the client certificate common name to incoming requests.
 func ClientInfoInterceptor() grpc.UnaryServerInterceptor {
-	return func(ctx context.Context, req interface{}, info *grpc.UnaryServerInfo, handler grpc.UnaryHandler) (interface{}, error) {
+	return func(ctx context.Context, req interface{}, _ *grpc.UnaryServerInfo, handler grpc.UnaryHandler) (interface{}, error) {
 		grpcPeer, ok := peer.FromContext(ctx)
 		if !ok {
 			return nil, status.Error(codes.Internal, "Failure")
diff --git a/services/api/grpc/interceptors/reqid.go b/services/api/grpc/interceptors/reqid.go
index 09b0c06..bc47a34 100644
--- a/services/api/grpc/interceptors/reqid.go
+++ b/services/api/grpc/interceptors/reqid.go
@@ -26,7 +26,7 @@ type RequestID struct{}
 
 // RequestIDInterceptor adds a request ID to incoming requests.
 func RequestIDInterceptor() grpc.UnaryServerInterceptor {
-	return func(ctx context.Context, req interface{}, info *grpc.UnaryServerInfo, handler grpc.UnaryHandler) (interface{}, error) {
+	return func(ctx context.Context, req interface{}, _ *grpc.UnaryServerInfo, handler grpc.UnaryHandler) (interface{}, error) {
 		// #nosec G404
 		newCtx := context.WithValue(ctx, &RequestID{}, fmt.Sprintf("%02x", rand.Int31()))
 		return handler(newCtx, req)
diff --git a/services/api/grpc/interceptors/sourceip.go b/services/api/grpc/interceptors/sourceip.go
index ea0af67..fd52df8 100644
--- a/services/api/grpc/interceptors/sourceip.go
+++ b/services/api/grpc/interceptors/sourceip.go
@@ -28,7 +28,7 @@ type ExternalIP struct{}
 
 // SourceIPInterceptor adds the source IP address to incoming requests.
 func SourceIPInterceptor() grpc.UnaryServerInterceptor {
-	return func(ctx context.Context, req interface{}, info *grpc.UnaryServerInfo, handler grpc.UnaryHandler) (interface{}, error) {
+	return func(ctx context.Context, req interface{}, _ *grpc.UnaryServerInfo, handler grpc.UnaryHandler) (interface{}, error) {
 		grpcPeer, ok := peer.FromContext(ctx)
 		if !ok {
 			return nil, status.Error(codes.Internal, "Failure")
diff --git a/services/sender/grpc/service.go b/services/sender/grpc/service.go
index bd9a314..c394b93 100644
--- a/services/sender/grpc/service.go
+++ b/services/sender/grpc/service.go
@@ -222,7 +222,7 @@ func (s *Service) obtainConnection(_ context.Context, address string) (*puddle.R
 	s.connectionPoolsMutex.Lock()
 	pool, exists := s.connectionPools[address]
 	if !exists {
-		constructor := func(ctx context.Context) (interface{}, error) {
+		constructor := func(_ context.Context) (interface{}, error) {
 			return grpc.Dial(address, []grpc.DialOption{
 				grpc.WithTransportCredentials(s.credentials),
 			}...)