diff --git a/cmd/gluetun/main.go b/cmd/gluetun/main.go
index 49813e0c..3282aff8 100644
--- a/cmd/gluetun/main.go
+++ b/cmd/gluetun/main.go
@@ -16,7 +16,7 @@ import (
 	"github.com/qdm12/dns/pkg/unbound"
 	"github.com/qdm12/gluetun/internal/alpine"
 	"github.com/qdm12/gluetun/internal/cli"
-	"github.com/qdm12/gluetun/internal/configuration/sources"
+	"github.com/qdm12/gluetun/internal/configuration/settings"
 	"github.com/qdm12/gluetun/internal/configuration/sources/env"
 	"github.com/qdm12/gluetun/internal/configuration/sources/files"
 	mux "github.com/qdm12/gluetun/internal/configuration/sources/merge"
@@ -128,7 +128,7 @@ var (
 
 //nolint:gocognit,gocyclo,maintidx
 func _main(ctx context.Context, buildInfo models.BuildInformation,
-	args []string, logger log.LoggerInterface, source sources.Source,
+	args []string, logger log.LoggerInterface, source Source,
 	tun Tun, netLinker netLinker, cmder command.RunStarter,
 	cli clier) error {
 	if len(args) > 1 { // cli operation
@@ -529,8 +529,8 @@ type Linker interface {
 type clier interface {
 	ClientKey(args []string) error
 	FormatServers(args []string) error
-	OpenvpnConfig(logger cli.OpenvpnConfigLogger, source sources.Source) error
-	HealthCheck(ctx context.Context, source sources.Source, warner cli.Warner) error
+	OpenvpnConfig(logger cli.OpenvpnConfigLogger, source cli.Source) error
+	HealthCheck(ctx context.Context, source cli.Source, warner cli.Warner) error
 	Update(ctx context.Context, args []string, logger cli.UpdaterLogger) error
 }
 
@@ -538,3 +538,9 @@ type Tun interface {
 	Check(tunDevice string) error
 	Create(tunDevice string) error
 }
+
+type Source interface {
+	Read() (settings settings.Settings, err error)
+	ReadHealth() (health settings.Health, err error)
+	String() string
+}
diff --git a/internal/cli/healthcheck.go b/internal/cli/healthcheck.go
index 90c13e3d..242bdcc1 100644
--- a/internal/cli/healthcheck.go
+++ b/internal/cli/healthcheck.go
@@ -6,11 +6,10 @@ import (
 	"net/http"
 	"time"
 
-	"github.com/qdm12/gluetun/internal/configuration/sources"
 	"github.com/qdm12/gluetun/internal/healthcheck"
 )
 
-func (c *CLI) HealthCheck(ctx context.Context, source sources.Source, warner Warner) error {
+func (c *CLI) HealthCheck(ctx context.Context, source Source, warner Warner) error {
 	// Extract the health server port from the configuration.
 	config, err := source.ReadHealth()
 	if err != nil {
diff --git a/internal/configuration/sources/source.go b/internal/cli/interfaces.go
similarity index 70%
rename from internal/configuration/sources/source.go
rename to internal/cli/interfaces.go
index bdb434a2..ad5ac64b 100644
--- a/internal/configuration/sources/source.go
+++ b/internal/cli/interfaces.go
@@ -1,9 +1,9 @@
-package sources
+package cli
 
 import "github.com/qdm12/gluetun/internal/configuration/settings"
 
 type Source interface {
 	Read() (settings settings.Settings, err error)
-	ReadHealth() (settings settings.Health, err error)
+	ReadHealth() (health settings.Health, err error)
 	String() string
 }
diff --git a/internal/cli/openvpnconfig.go b/internal/cli/openvpnconfig.go
index 85c1b8cb..e39f5dae 100644
--- a/internal/cli/openvpnconfig.go
+++ b/internal/cli/openvpnconfig.go
@@ -8,7 +8,6 @@ import (
 	"strings"
 	"time"
 
-	"github.com/qdm12/gluetun/internal/configuration/sources"
 	"github.com/qdm12/gluetun/internal/constants"
 	"github.com/qdm12/gluetun/internal/openvpn/extract"
 	"github.com/qdm12/gluetun/internal/provider"
@@ -36,7 +35,7 @@ type IPFetcher interface {
 	FetchMultiInfo(ctx context.Context, ips []net.IP) (data []ipinfo.Response, err error)
 }
 
-func (c *CLI) OpenvpnConfig(logger OpenvpnConfigLogger, source sources.Source) error {
+func (c *CLI) OpenvpnConfig(logger OpenvpnConfigLogger, source Source) error {
 	storage, err := storage.New(logger, constants.ServersData)
 	if err != nil {
 		return err
diff --git a/internal/configuration/sources/env/reader.go b/internal/configuration/sources/env/reader.go
index 17b64a44..725534c6 100644
--- a/internal/configuration/sources/env/reader.go
+++ b/internal/configuration/sources/env/reader.go
@@ -2,11 +2,8 @@ package env
 
 import (
 	"github.com/qdm12/gluetun/internal/configuration/settings"
-	"github.com/qdm12/gluetun/internal/configuration/sources"
 )
 
-var _ sources.Source = (*Reader)(nil)
-
 type Reader struct {
 	warner Warner
 }
diff --git a/internal/configuration/sources/files/reader.go b/internal/configuration/sources/files/reader.go
index 56981574..34166ac4 100644
--- a/internal/configuration/sources/files/reader.go
+++ b/internal/configuration/sources/files/reader.go
@@ -2,11 +2,8 @@ package files
 
 import (
 	"github.com/qdm12/gluetun/internal/configuration/settings"
-	"github.com/qdm12/gluetun/internal/configuration/sources"
 )
 
-var _ sources.Source = (*Reader)(nil)
-
 type Reader struct{}
 
 func New() *Reader {
diff --git a/internal/configuration/sources/merge/reader.go b/internal/configuration/sources/merge/reader.go
index ee9723f5..dc46f209 100644
--- a/internal/configuration/sources/merge/reader.go
+++ b/internal/configuration/sources/merge/reader.go
@@ -5,16 +5,19 @@ import (
 	"strings"
 
 	"github.com/qdm12/gluetun/internal/configuration/settings"
-	"github.com/qdm12/gluetun/internal/configuration/sources"
 )
 
-var _ sources.Source = (*Reader)(nil)
-
-type Reader struct {
-	sources []sources.Source
+type Source interface {
+	Read() (settings settings.Settings, err error)
+	ReadHealth() (settings settings.Health, err error)
+	String() string
 }
 
-func New(sources ...sources.Source) *Reader {
+type Reader struct {
+	sources []Source
+}
+
+func New(sources ...Source) *Reader {
 	return &Reader{
 		sources: sources,
 	}
diff --git a/internal/configuration/sources/secrets/reader.go b/internal/configuration/sources/secrets/reader.go
index 10b4e8a5..e483f6b9 100644
--- a/internal/configuration/sources/secrets/reader.go
+++ b/internal/configuration/sources/secrets/reader.go
@@ -2,13 +2,9 @@ package secrets
 
 import (
 	"github.com/qdm12/gluetun/internal/configuration/settings"
-	"github.com/qdm12/gluetun/internal/configuration/sources"
 )
 
-var _ sources.Source = (*Reader)(nil)
-
-type Reader struct {
-}
+type Reader struct{}
 
 func New() *Reader {
 	return &Reader{}