diff --git a/README.md b/README.md
index c4deb56ea..d5b6c125c 100644
--- a/README.md
+++ b/README.md
@@ -48,7 +48,7 @@ You need the following tools to build the library with the provided makefiles:
 
 * GNU Make or a build tool that CMake supports.
 * A C99 toolchain (compiler, linker, archiver). We actively test with GCC 5.4, Clang 3.8, IAR8 and Visual Studio 2013. More recent versions should work. Slightly older versions may work.
-* Python 3 to generate the test code.
+* Python 3.6 or later to generate the test code.
 * Perl to run the tests.
 
 ### Make