diff --git a/things/api/http/channels.go b/things/api/http/channels.go
index a965d8343..0cad86004 100644
--- a/things/api/http/channels.go
+++ b/things/api/http/channels.go
@@ -21,7 +21,7 @@ import (
 	"go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp"
 )
 
-func groupsHandler(svc groups.Service, r *chi.Mux, logger logger.Logger) http.Handler {
+func groupsHandler(svc groups.Service, r *chi.Mux, logger logger.Logger) *chi.Mux {
 	opts := []kithttp.ServerOption{
 		kithttp.ServerErrorEncoder(apiutil.LoggingErrorEncoder(logger, api.EncodeError)),
 	}
diff --git a/things/api/http/clients.go b/things/api/http/clients.go
index 8695a7569..546c3f0f1 100644
--- a/things/api/http/clients.go
+++ b/things/api/http/clients.go
@@ -20,7 +20,7 @@ import (
 	"go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp"
 )
 
-func clientsHandler(svc things.Service, r *chi.Mux, logger mglog.Logger) http.Handler {
+func clientsHandler(svc things.Service, r *chi.Mux, logger mglog.Logger) *chi.Mux {
 	opts := []kithttp.ServerOption{
 		kithttp.ServerErrorEncoder(apiutil.LoggingErrorEncoder(logger, api.EncodeError)),
 	}
diff --git a/things/api/http/transport.go b/things/api/http/transport.go
index 6c0fb4131..8f111a837 100644
--- a/things/api/http/transport.go
+++ b/things/api/http/transport.go
@@ -16,8 +16,8 @@ import (
 
 // MakeHandler returns a HTTP handler for Things and Groups API endpoints.
 func MakeHandler(tsvc things.Service, grps groups.Service, mux *chi.Mux, logger mglog.Logger, instanceID string) http.Handler {
-	clientsHandler(tsvc, mux, logger)
-	groupsHandler(grps, mux, logger)
+	mux = clientsHandler(tsvc, mux, logger)
+	mux = groupsHandler(grps, mux, logger)
 
 	mux.Get("/health", magistrala.Health("things", instanceID))
 	mux.Handle("/metrics", promhttp.Handler())
diff --git a/users/api/clients.go b/users/api/clients.go
index 3948abdbc..a647b794a 100644
--- a/users/api/clients.go
+++ b/users/api/clients.go
@@ -22,7 +22,7 @@ import (
 )
 
 // MakeHandler returns a HTTP handler for API endpoints.
-func clientsHandler(svc users.Service, r *chi.Mux, logger mglog.Logger) http.Handler {
+func clientsHandler(svc users.Service, r *chi.Mux, logger mglog.Logger) *chi.Mux {
 	opts := []kithttp.ServerOption{
 		kithttp.ServerErrorEncoder(apiutil.LoggingErrorEncoder(logger, api.EncodeError)),
 	}
diff --git a/users/api/groups.go b/users/api/groups.go
index f7e3e0bf9..8dc337520 100644
--- a/users/api/groups.go
+++ b/users/api/groups.go
@@ -22,7 +22,7 @@ import (
 )
 
 // MakeHandler returns a HTTP handler for Groups API endpoints.
-func groupsHandler(svc groups.Service, r *chi.Mux, logger logger.Logger) http.Handler {
+func groupsHandler(svc groups.Service, r *chi.Mux, logger logger.Logger) *chi.Mux {
 	opts := []kithttp.ServerOption{
 		kithttp.ServerErrorEncoder(apiutil.LoggingErrorEncoder(logger, api.EncodeError)),
 	}
diff --git a/users/api/transport.go b/users/api/transport.go
index 2bb91595d..43fe55fdf 100644
--- a/users/api/transport.go
+++ b/users/api/transport.go
@@ -16,8 +16,8 @@ import (
 
 // MakeHandler returns a HTTP handler for Users and Groups API endpoints.
 func MakeHandler(cls users.Service, grps groups.Service, mux *chi.Mux, logger mglog.Logger, instanceID string) http.Handler {
-	clientsHandler(cls, mux, logger)
-	groupsHandler(grps, mux, logger)
+	mux = clientsHandler(cls, mux, logger)
+	mux = groupsHandler(grps, mux, logger)
 
 	mux.Get("/health", magistrala.Health("users", instanceID))
 	mux.Handle("/metrics", promhttp.Handler())