diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 0bdf4397a..30ba81484 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required (VERSION 3.10)
+cmake_minimum_required (VERSION 3.9)
 project (slic3r)
 
 # only on newer GCCs: -ftemplate-backtrace-limit=0