diff --git a/doc/SEC.md b/doc/SEC.md
index 5a00c96..8148ce8 100644
--- a/doc/SEC.md
+++ b/doc/SEC.md
@@ -128,7 +128,7 @@ July 17th, 2014. Release announcement:
 * https://lwn.net/Articles/605933/
 
 
-There were 25 Kernel 3.10.49 vulnerabilities disclosed in 2021:
+There were twenty-five Kernel 3.10.49 vulnerabilities disclosed in 2021:
 
 * http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-4083