diff --git a/FindAsciidoc.cmake b/FindAsciidoc.cmake
index b3fd2ff..cd60952 100644
--- a/FindAsciidoc.cmake
+++ b/FindAsciidoc.cmake
@@ -1,4 +1,4 @@
-cmake_minimum_required (VERSION 3.7)
+cmake_minimum_required (VERSION 3.20.0)
 
 find_program(ASCIIDOC NAMES asciidoc asciidoctor DOC "path to the asciidoc binary")
 mark_as_advanced (ASCIIDOC)