diff --git a/CMakeLists.txt b/CMakeLists.txt
index 409f5bff31..da6f08e7f5 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.8)
+cmake_minimum_required(VERSION 3.1)
 
 ##
 ## PROJECT
diff --git a/benchmarks/CMakeLists.txt b/benchmarks/CMakeLists.txt
index a53812c10b..dd3f3027f1 100644
--- a/benchmarks/CMakeLists.txt
+++ b/benchmarks/CMakeLists.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.8)
+cmake_minimum_required(VERSION 3.1)
 project(JSON_Benchmarks LANGUAGES CXX)
 
 # set compiler flags
diff --git a/test/cmake_add_subdirectory/project/CMakeLists.txt b/test/cmake_add_subdirectory/project/CMakeLists.txt
index 2c5be183bb..21357b6857 100644
--- a/test/cmake_add_subdirectory/project/CMakeLists.txt
+++ b/test/cmake_add_subdirectory/project/CMakeLists.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.8)
+cmake_minimum_required(VERSION 3.1)
 
 project(DummyImport CXX)
 
diff --git a/test/cmake_import/project/CMakeLists.txt b/test/cmake_import/project/CMakeLists.txt
index d268d72c18..fe892fc1f6 100644
--- a/test/cmake_import/project/CMakeLists.txt
+++ b/test/cmake_import/project/CMakeLists.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.8)
+cmake_minimum_required(VERSION 3.1)
 
 project(DummyImport CXX)
 
diff --git a/test/cmake_import_minver/project/CMakeLists.txt b/test/cmake_import_minver/project/CMakeLists.txt
index eeef329607..29056bdc54 100644
--- a/test/cmake_import_minver/project/CMakeLists.txt
+++ b/test/cmake_import_minver/project/CMakeLists.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.8)
+cmake_minimum_required(VERSION 3.1)
 
 project(DummyImportMinVer CXX)