diff --git a/src/app/spreed-webrtc-server/random.go b/src/app/spreed-webrtc-server/random.go
index a884cd5b..c498c7e5 100644
--- a/src/app/spreed-webrtc-server/random.go
+++ b/src/app/spreed-webrtc-server/random.go
@@ -28,7 +28,7 @@ import (
 )
 
 const (
-	dict = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVW0123456789"
+	dict = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"
 )
 
 func NewRandomString(length int) string {