diff --git a/main.go b/main.go
index 12756ceed..a8b7792df 100644
--- a/main.go
+++ b/main.go
@@ -47,7 +47,8 @@ const (
 )
 
 var (
-	version = "" // Must not be const, set using ldflags at build time
+	version            = "" // Must not be const, set using ldflags at build time
+	validFeatureNameRe = regexp.MustCompile(`^([-.\w]*)?[A-Za-z0-9]$`)
 )
 
 // package loggers
@@ -355,6 +356,12 @@ func getFeatureLabels(source source.FeatureSource) (labels Labels, err error) {
 		return nil, err
 	}
 	for k := range features {
+		// Validate label
+		if !validFeatureNameRe.MatchString(k) {
+			stderrLogger.Printf("Invalid feature name '%s', ignoring...", k)
+			continue
+		}
+
 		prefix := source.Name() + "-"
 		switch source.(type) {
 		case local.Source: