diff --git a/lib/microcms.rb b/lib/microcms.rb
index a603d59..88055bb 100644
--- a/lib/microcms.rb
+++ b/lib/microcms.rb
@@ -161,7 +161,7 @@ def initialize(status_code:, body:)
       @status_code = status_code
       @body = parse_body(body)
 
-      message = @body['message'] || 'Unknown error occured.'
+      message = @body['message'] || 'Unknown error occurred.'
       super(message)
     end