diff --git a/config/_default/params.toml b/config/_default/params.toml
index 6d093f8..f054061 100644
--- a/config/_default/params.toml
+++ b/config/_default/params.toml
@@ -57,7 +57,7 @@ show_categories = true
 [announcement]
 enable = true
 expire_days = 7
-content = "We're Going Underground [Goodbye, Open Web](/memos/HMC-Memo-010-Going-Underground.pdf)"
+content = "We're Going Underground ([Goodbye, Open Web](/memos/HMC-Memo-010-Going-Underground.pdf))"
 
 # seo meta data for OpenGraph / Twitter Card
 # seo module: https://github.com/gethugothemes/hugo-modules/tree/master/seo-tools/basic-seo