diff --git a/internal/conf/authmethod.go b/internal/conf/authmethod.go
index 5866fcbc..6c0d2257 100644
--- a/internal/conf/authmethod.go
+++ b/internal/conf/authmethod.go
@@ -3,6 +3,7 @@ package conf
 import (
 	"encoding/json"
 	"fmt"
+	"sort"
 	"strings"
 
 	"github.com/aler9/gortsplib/pkg/headers"
@@ -13,18 +14,20 @@ type AuthMethods []headers.AuthMethod
 
 // MarshalJSON marshals a AuthMethods into JSON.
 func (d AuthMethods) MarshalJSON() ([]byte, error) {
-	var out []string
+	out := make([]string, len(d))
 
-	for _, v := range d {
+	for i, v := range d {
 		switch v {
 		case headers.AuthBasic:
-			out = append(out, "basic")
+			out[i] = "basic"
 
 		default:
-			out = append(out, "digest")
+			out[i] = "digest"
 		}
 	}
 
+	sort.Strings(out)
+
 	return json.Marshal(out)
 }
 
diff --git a/internal/conf/ipsornets.go b/internal/conf/ipsornets.go
index cf5c5799..81c7df53 100644
--- a/internal/conf/ipsornets.go
+++ b/internal/conf/ipsornets.go
@@ -4,6 +4,7 @@ import (
 	"encoding/json"
 	"fmt"
 	"net"
+	"sort"
 	"strings"
 )
 
@@ -18,6 +19,8 @@ func (d IPsOrNets) MarshalJSON() ([]byte, error) {
 		out[i] = v.(fmt.Stringer).String()
 	}
 
+	sort.Strings(out)
+
 	return json.Marshal(out)
 }
 
diff --git a/internal/conf/logdestination.go b/internal/conf/logdestination.go
index d324ef0a..5715d667 100644
--- a/internal/conf/logdestination.go
+++ b/internal/conf/logdestination.go
@@ -3,6 +3,7 @@ package conf
 import (
 	"encoding/json"
 	"fmt"
+	"sort"
 	"strings"
 
 	"github.com/aler9/rtsp-simple-server/internal/logger"
@@ -34,6 +35,8 @@ func (d LogDestinations) MarshalJSON() ([]byte, error) {
 		i++
 	}
 
+	sort.Strings(out)
+
 	return json.Marshal(out)
 }
 
diff --git a/internal/conf/protocol.go b/internal/conf/protocol.go
index c09df72c..0843b011 100644
--- a/internal/conf/protocol.go
+++ b/internal/conf/protocol.go
@@ -3,6 +3,7 @@ package conf
 import (
 	"encoding/json"
 	"fmt"
+	"sort"
 	"strings"
 )
 
@@ -42,6 +43,8 @@ func (d Protocols) MarshalJSON() ([]byte, error) {
 		i++
 	}
 
+	sort.Strings(out)
+
 	return json.Marshal(out)
 }