diff --git a/src/types/configuration.ts b/src/types/configuration.ts
index f87686d..d5cad86 100644
--- a/src/types/configuration.ts
+++ b/src/types/configuration.ts
@@ -15,6 +15,7 @@ export interface Configuration {
 
 export const enum BackdropSizes {
   W300 = 'w300',
+  W500 = 'w500',
   W780 = 'w780',
   W1280 = 'w1280',
   ORIGINAL = 'original',