diff --git a/index.js b/index.js
index 4f6c2f3..050016a 100644
--- a/index.js
+++ b/index.js
@@ -7,6 +7,7 @@ const statusCodeCacheableByDefault = new Set([
     206,
     300,
     301,
+    308,
     404,
     405,
     410,