diff --git a/random/random.go b/random/random.go
index 282241b..aac04d8 100644
--- a/random/random.go
+++ b/random/random.go
@@ -43,6 +43,10 @@ func New() *Random {
 }
 
 func (r *Random) String(length uint8, charsets ...string) string {
+	if length == 0 {
+		return ""
+	}
+
 	charset := strings.Join(charsets, "")
 	if charset == "" {
 		charset = Alphanumeric
diff --git a/random/random_test.go b/random/random_test.go
index 5927dcf..0b26f9b 100644
--- a/random/random_test.go
+++ b/random/random_test.go
@@ -28,6 +28,10 @@ func TestRandomString(t *testing.T) {
 			name:       "ok, 32",
 			whenLength: 32,
 		},
+		{
+			name:       "ok, 0",
+			whenLength: 0,
+		},
 	}
 
 	for _, tc := range testCases {