diff --git a/pkg/config/config.go b/pkg/config/config.go
index 6f289df2..9e43e5a5 100644
--- a/pkg/config/config.go
+++ b/pkg/config/config.go
@@ -59,10 +59,10 @@ type Custom struct {
 type Tokens struct {
 	// YouTube API key.
 	// See https://developers.google.com/youtube/registering_an_application
-	YouTube string `toml:"youtube"`
+	YouTube StringSlice `toml:"youtube"`
 	// Vimeo developer key.
 	// See https://developer.vimeo.com/api/guides/start#generate-access-token
-	Vimeo string `toml:"vimeo"`
+	Vimeo StringSlice `toml:"vimeo"`
 }
 
 type Server struct {
diff --git a/pkg/config/config_test.go b/pkg/config/config_test.go
index 7660615b..b2372018 100644
--- a/pkg/config/config_test.go
+++ b/pkg/config/config_test.go
@@ -16,7 +16,10 @@ func TestLoadConfig(t *testing.T) {
 	const file = `
 [tokens]
 youtube = "123"
-vimeo = "321"
+vimeo = [
+  "321",
+  "456"
+]
 
 [server]
 port = 80
@@ -51,8 +54,11 @@ self_update = true
 
 	assert.Equal(t, "/home/user/db/", config.Database.Dir)
 
-	assert.Equal(t, "123", config.Tokens.YouTube)
-	assert.Equal(t, "321", config.Tokens.Vimeo)
+	require.Len(t, config.Tokens.YouTube, 1)
+	assert.Equal(t, "123", config.Tokens.YouTube[0])
+	require.Len(t, config.Tokens.Vimeo, 2)
+	assert.Equal(t, "321", config.Tokens.Vimeo[0])
+	assert.Equal(t, "456", config.Tokens.Vimeo[1])
 
 	assert.Len(t, config.Feeds, 1)
 	feed, ok := config.Feeds["XYZ"]
@@ -75,6 +81,28 @@ self_update = true
 	assert.True(t, config.Downloader.SelfUpdate)
 }
 
+func TestLoadEmptyKeyList(t *testing.T) {
+	const file = `
+[tokens]
+vimeo = []
+
+[server]
+data_dir = "/data"
+[feeds]
+  [feeds.A]
+  url = "https://youtube.com/watch?v=ygIUF678y40"
+`
+	path := setup(t, file)
+	defer os.Remove(path)
+
+	config, err := LoadConfig(path)
+	assert.NoError(t, err)
+	require.NotNil(t, config)
+
+	require.Len(t, config.Tokens.YouTube, 0)
+	require.Len(t, config.Tokens.Vimeo, 0)
+}
+
 func TestApplyDefaults(t *testing.T) {
 	const file = `
 [server]
diff --git a/pkg/config/toml.go b/pkg/config/toml.go
index 474a98cc..bdcf7717 100644
--- a/pkg/config/toml.go
+++ b/pkg/config/toml.go
@@ -2,6 +2,8 @@ package config
 
 import (
 	"time"
+
+	"github.com/pkg/errors"
 )
 
 type Duration struct {
@@ -17,3 +19,23 @@ func (d *Duration) UnmarshalText(text []byte) error {
 	*d = Duration{res}
 	return nil
 }
+
+// StringSlice is a toml extension that lets you to specify either a string
+// value (a slice with just one element) or a string slice.
+type StringSlice []string
+
+func (s *StringSlice) UnmarshalTOML(decode func(interface{}) error) error {
+	var single string
+	if err := decode(&single); err == nil {
+		*s = []string{single}
+		return nil
+	}
+
+	var slice []string
+	if err := decode(&slice); err == nil {
+		*s = slice
+		return nil
+	}
+
+	return errors.New("failed to decode string (slice) field")
+}
diff --git a/pkg/feed/common.go b/pkg/feed/common.go
index eca7be6b..debaf51d 100644
--- a/pkg/feed/common.go
+++ b/pkg/feed/common.go
@@ -26,9 +26,9 @@ func New(ctx context.Context, cfg *config.Feed, tokens config.Tokens) (Builder,
 
 	switch info.Provider {
 	case model.ProviderYoutube:
-		provider, err = NewYouTubeBuilder(tokens.YouTube)
+		provider, err = NewYouTubeBuilder(tokens.YouTube[0])
 	case model.ProviderVimeo:
-		provider, err = NewVimeoBuilder(ctx, tokens.Vimeo)
+		provider, err = NewVimeoBuilder(ctx, tokens.Vimeo[0])
 	default:
 		return nil, errors.Errorf("unsupported provider %q", info.Provider)
 	}