diff --git a/.github/actions/spelling/expect/software.txt b/.github/actions/spelling/expect/software.txt
index 8ed24f0..239fdd2 100644
--- a/.github/actions/spelling/expect/software.txt
+++ b/.github/actions/spelling/expect/software.txt
@@ -6,3 +6,4 @@ cspell
 NUnit
 reportgenerator
 Toolpackage
+markdownlint