diff --git a/tool/birdwch/README.md b/tool/birdwch/README.md
index 1c41b794..3e8d36d8 100644
--- a/tool/birdwch/README.md
+++ b/tool/birdwch/README.md
@@ -52,7 +52,7 @@ so the bot is appreciated.
 
 ### Database
 
-- toot_cfsaid: Tweet URL which CF link was observed
+- tweet_cfsaid: Tweet URL which CF link was observed
 ```
 id	varchar(40) UNIQUE
 who	varchar(80) INDEX
@@ -60,13 +60,13 @@ url	varchar(200) INDEX
 ym	int(6) INDEX
 ```
 
-- toot_notcf_fqdn: Unknown FQDN which was not listed as Cloudflare
+- tweet_notcf_fqdn: Unknown FQDN which was not listed as Cloudflare
 ```
 fqdn	varchar(200) UNIQUE
 dl	int(1) INDEX
 ```
 
-- toot_scanned: To make sure not to analyze same tweet again
+- tweet_scanned: To make sure not to analyze same tweet again
 ```
 id	varchar(40) UNIQUE
 who	varchar(80) INDEX
@@ -74,7 +74,7 @@ iscf	int(1) INDEX
 ym	int(6) INDEX
 ```
 
-- toot_sharefqdn: Just for counting FQDN
+- tweet_sharefqdn: Just for counting FQDN
 ```
 id	varchar(40) UNIQUE
 fqdn	varchar(200) INDEX