diff --git a/README.md b/README.md
index 78f9b10a..ca7ff3b3 100644
--- a/README.md
+++ b/README.md
@@ -116,7 +116,7 @@ with:
 Inputs supported by this GitHub Action.
 
 - php-version `required`
-- extension `optional`
+- extensions `optional`
 - ini-values `optional`
 - coverage `optional`
 - pecl `optional`