diff --git a/cred/manager.go b/cred/manager.go
index 2a39b7b..90ac4ea 100644
--- a/cred/manager.go
+++ b/cred/manager.go
@@ -13,6 +13,7 @@ import (
 
 	"github.com/database64128/shadowsocks-go/maps"
 	"github.com/database64128/shadowsocks-go/mmap"
+	"github.com/database64128/shadowsocks-go/slices"
 	"github.com/database64128/shadowsocks-go/ss2022"
 	"go.uber.org/zap"
 )
@@ -44,6 +45,11 @@ type UserCredential struct {
 	UPSK []byte `json:"uPSK"`
 }
 
+// Less is useful for sorting user credentials by username.
+func (uc UserCredential) Less(other UserCredential) bool {
+	return uc.Name < other.Name
+}
+
 type cachedUserCredential struct {
 	uPSK     []byte
 	uPSKHash [ss2022.IdentityHeaderLength]byte
@@ -60,6 +66,7 @@ func (s *ManagedServer) Credentials() []UserCredential {
 		})
 	}
 	s.mu.RUnlock()
+	slices.SortFunc(ucs, UserCredential.Less)
 	return ucs
 }
 
diff --git a/stats/collector.go b/stats/collector.go
index d8ae453..13b6982 100644
--- a/stats/collector.go
+++ b/stats/collector.go
@@ -3,6 +3,8 @@ package stats
 import (
 	"sync"
 	"sync/atomic"
+
+	"github.com/database64128/shadowsocks-go/slices"
 )
 
 type trafficCollector struct {
@@ -82,6 +84,11 @@ type User struct {
 	Traffic
 }
 
+// Less is useful for sorting users by name.
+func (u User) Less(other User) bool {
+	return u.Name < other.Name
+}
+
 func (uc *userCollector) snapshot(username string) User {
 	return User{
 		Name:    username,
@@ -164,6 +171,7 @@ func (sc *serverCollector) Snapshot() (s Server) {
 		s.Users = append(s.Users, u)
 	}
 	sc.mu.RUnlock()
+	slices.SortFunc(s.Users, User.Less)
 	return
 }
 
@@ -178,6 +186,7 @@ func (sc *serverCollector) SnapshotAndReset() (s Server) {
 		s.Users = append(s.Users, u)
 	}
 	sc.mu.RUnlock()
+	slices.SortFunc(s.Users, User.Less)
 	return
 }