diff --git a/README.md b/README.md
index c4540a3..8eba1dd 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,4 @@
-# S3ImageServer [V2.4.4]
+# S3ImageServer [V2.5.0]
 
 ### Browse images from S3 bucket
 
diff --git a/src/config.go b/src/config.go
index 6b183de..89409af 100644
--- a/src/config.go
+++ b/src/config.go
@@ -8,6 +8,7 @@ import (
 	"os"
 	"path"
 	"reflect"
+	"regexp"
 	"strconv"
 	"strings"
 	"time"
@@ -40,19 +41,20 @@ type ImageGroup struct {
 type Config struct {
 	S3 S3Config `yaml:"s3"`
 
-	BasePath               string       `yaml:"basePath"`
-	WindowTitle            string       `yaml:"windowTitle"`
-	ScaleInitialPercentage uint8        `yaml:"scaleInitialPercentage"`
-	PreviewFilename        string       `yaml:"previewFilename"`
-	GeonamesFilename       string       `yaml:"geonamesFilename"`
-	FeaturesExtension      string       `yaml:"featuresExtension"`
-	FeaturesPropertyName   string       `yaml:"featuresPropertyName"`
-	FullProductExtension   string       `yaml:"fullProductExtension"`
-	FullProductProtocol    string       `yaml:"fullProductProtocol"`
-	FullProductRootUrl     string       `yaml:"fullProductRootUrl"`
-	FullProductSignedUrl   bool         `yaml:"fullProductSignedUrl"`
-	ImageGroups            []ImageGroup `yaml:"imageGroups"`
-	imageTypes             []ImageType
+	BasePath                string `yaml:"basePath"`
+	WindowTitle             string `yaml:"windowTitle"`
+	ScaleInitialPercentage  uint8  `yaml:"scaleInitialPercentage"`
+	PreviewFilename         string `yaml:"previewFilename"`
+	GeonamesFilename        string `yaml:"geonamesFilename"`
+	FeaturesExtensionRegexp string `yaml:"featuresExtensionRegexp"`
+	featuresExtensionRegexp *regexp.Regexp
+	FeaturesPropertyName    string       `yaml:"featuresPropertyName"`
+	FullProductExtension    string       `yaml:"fullProductExtension"`
+	FullProductProtocol     string       `yaml:"fullProductProtocol"`
+	FullProductRootUrl      string       `yaml:"fullProductRootUrl"`
+	FullProductSignedUrl    bool         `yaml:"fullProductSignedUrl"`
+	ImageGroups             []ImageGroup `yaml:"imageGroups"`
+	imageTypes              []ImageType
 
 	LogLevel      string                 `yaml:"logLevel"`
 	ColorLogs     bool                   `yaml:"colorLogs"`
@@ -217,6 +219,14 @@ func loadConfigFromFile(filePath string) (Config, error) {
 	if !valid {
 		return Config{}, errors.New(strings.Join(errs, "\n- "))
 	}
+
+	if cfg.FeaturesExtensionRegexp != "" {
+		cfg.featuresExtensionRegexp, err = regexp.Compile(cfg.FeaturesExtensionRegexp)
+		if err != nil {
+			return Config{}, fmt.Errorf("invalid features extension regexp: %w", err)
+		}
+	}
+
 	for _, group := range cfg.ImageGroups {
 		cfg.imageTypes = append(cfg.imageTypes, group.Types...)
 	}
@@ -232,6 +242,8 @@ func (config Config) String() string {
 	result += "scaleInitialPercentage: " + strconv.FormatUint(uint64(config.ScaleInitialPercentage), 10) + "\n"
 	result += "previewFilename: " + config.PreviewFilename + "\n"
 	result += "geonamesFilename: " + config.GeonamesFilename + "\n"
+	result += "featuresExtensionRegexp: " + config.FeaturesExtensionRegexp + "\n"
+	result += "featuresPropertyName: " + config.FeaturesPropertyName + "\n"
 	result += "fullProductExtension: " + config.FullProductExtension + "\n"
 	result += "fullProductProtocol: " + config.FullProductProtocol + "\n"
 	result += "fullProductRootUrl: " + config.FullProductRootUrl + "\n"
diff --git a/src/features.go b/src/features.go
index 4fbe8af..5f8f6c3 100644
--- a/src/features.go
+++ b/src/features.go
@@ -50,6 +50,7 @@ func parseFeatures(filePath string) (Features, error) {
 	features := make(Features)
 	for _, rawFeature := range rawFeatures.Features {
 		detection := strings.Title(rawFeature.Properties[config.FeaturesPropertyName].(string))
+		// TODO: inflection ?
 		if !strings.HasSuffix(detection, "s") {
 			detection += "s"
 		}
diff --git a/src/images.go b/src/images.go
index ea7344e..1b8911a 100644
--- a/src/images.go
+++ b/src/images.go
@@ -49,6 +49,10 @@ func (image S3Image) getAssociatedGeonamesPath() string {
 	return image.FormattedKey[:strings.LastIndex(image.FormattedKey, "@")+1] + config.GeonamesFilename
 }
 
+func (image S3Image) String() string {
+	return image.S3Key
+}
+
 type S3Images []S3Image
 
 func (images S3Images) findImageByKey(key string) (image *S3Image, found bool) {
diff --git a/src/main.go b/src/main.go
index edb226e..5f264a9 100644
--- a/src/main.go
+++ b/src/main.go
@@ -11,7 +11,7 @@ import (
 	"time"
 )
 
-const version = "2.4.4"
+const version = "2.5.0"
 
 const defaultTempDirName = "s3_image_server"
 
diff --git a/src/resources/example_config.yml b/src/resources/example_config.yml
index fdf61f0..beff099 100644
--- a/src/resources/example_config.yml
+++ b/src/resources/example_config.yml
@@ -10,7 +10,7 @@ windowTitle: "S3 Image Viewer"
 scaleInitialPercentage: 50
 previewFilename: "preview.jpg"
 geonamesFilename: "geonames.json"
-featuresExtension: ".features.json"
+featuresExtensionRegexp: "\\.features\\.json$"
 featuresPropertyName: "detection"
 fullProductExtension: "tif"
 fullProductProtocol: "protocol://"
diff --git a/src/s3.go b/src/s3.go
index 363b09b..5938107 100644
--- a/src/s3.go
+++ b/src/s3.go
@@ -177,7 +177,7 @@ func listMetaFiles(minioClient *minio.Client, dirs map[string]string, eventChan
 			ctx, cancel := context.WithTimeout(context.Background(), config.PollingPeriod)
 			defer cancel()
 			printDebug("Looking for meta files in ", dir, " | config.geonamesFilename: ", config.GeonamesFilename)
-			for obj := range minioClient.ListObjects(ctx, config.S3.BucketName, minio.ListObjectsOptions{Prefix: dir, Recursive: true}) {
+			for obj := range minioClient.ListObjects(ctx, config.S3.BucketName, minio.ListObjectsOptions{Prefix: dir + "/", Recursive: true}) {
 				if obj.Err != nil {
 					continue
 				}
@@ -201,7 +201,7 @@ func listMetaFiles(minioClient *minio.Client, dirs map[string]string, eventChan
 				}
 
 				// features
-				if len(config.FeaturesExtension) > 0 && strings.HasSuffix(obj.Key, config.FeaturesExtension) {
+				if config.featuresExtensionRegexp != nil && config.featuresExtensionRegexp.MatchString(obj.Key) {
 					parts := strings.Split(obj.Key, "/")
 					filename := parts[len(parts)-1]
 					formattedFilename := formatFileName(dir + "/" + filename)