diff --git a/lib/feedcellar/command.rb b/lib/feedcellar/command.rb
index <HASH>..<HASH> 100644
--- a/lib/feedcellar/command.rb
+++ b/lib/feedcellar/command.rb
@@ -15,7 +15,7 @@ module Feedcellar
     def register(url)
       @database = GroongaDatabase.new
       @database.open(@work_dir) do |database|
-        database.regist(url)
+        database.register(url)
       end
     end
 
@@ -24,7 +24,7 @@ module Feedcellar
       @database = GroongaDatabase.new
       @database.open(@work_dir) do |database|
         Feedcellar::Opml.parse(opml_xml).each do |resource|
-          database.regist(resource["title"], resource)
+          database.register(resource["title"], resource)
         end
       end
     end
diff --git a/lib/feedcellar/groonga_database.rb b/lib/feedcellar/groonga_database.rb
index <HASH>..<HASH> 100644
--- a/lib/feedcellar/groonga_database.rb
+++ b/lib/feedcellar/groonga_database.rb
@@ -30,7 +30,7 @@ module Feedcellar
       end
     end
 
-    def regist(title, attributes)
+    def register(title, attributes)
       feeds = Groonga["Resources"]
       feeds.add(title, attributes)
     end
Fix English

"regist" is not English... I should use "register".
The word "register" is also a noun and a verb.