diff --git a/CMakeLists.txt b/CMakeLists.txt
index abc5a647..f1ab6f63 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -38,7 +38,7 @@ IF(BIICODE)
 	  ENDIF()
 	ENDIF()
 ELSE()
-cmake_minimum_required (VERSION 2.8)
+cmake_minimum_required (VERSION 3.5)
 
 if (NOT DEFINED CMAKE_BUILD_TYPE)
     set (CMAKE_BUILD_TYPE Release CACHE STRING "Build type")
diff --git a/lib/googletest/CMakeLists.txt b/lib/googletest/CMakeLists.txt
index f11bbb52..60687ce0 100644
--- a/lib/googletest/CMakeLists.txt
+++ b/lib/googletest/CMakeLists.txt
@@ -1,7 +1,7 @@
 # Note: CMake support is community-based. The maintainers do not use CMake
 # internally.
 
-cmake_minimum_required(VERSION 2.8.8)
+cmake_minimum_required(VERSION 3.5)
 
 if (POLICY CMP0048)
   cmake_policy(SET CMP0048 NEW)
diff --git a/lib/googletest/googlemock/CMakeLists.txt b/lib/googletest/googlemock/CMakeLists.txt
index d32b70b5..33eb5252 100644
--- a/lib/googletest/googlemock/CMakeLists.txt
+++ b/lib/googletest/googlemock/CMakeLists.txt
@@ -42,7 +42,7 @@ else()
   cmake_policy(SET CMP0048 NEW)
   project(gmock VERSION ${GOOGLETEST_VERSION} LANGUAGES CXX C)
 endif()
-cmake_minimum_required(VERSION 2.6.4)
+cmake_minimum_required(VERSION 3.5)
 
 if (COMMAND set_up_hermetic_build)
   set_up_hermetic_build()
diff --git a/lib/googletest/googletest/CMakeLists.txt b/lib/googletest/googletest/CMakeLists.txt
index db292946..e41e5976 100644
--- a/lib/googletest/googletest/CMakeLists.txt
+++ b/lib/googletest/googletest/CMakeLists.txt
@@ -53,7 +53,7 @@ else()
   cmake_policy(SET CMP0048 NEW)
   project(gtest VERSION ${GOOGLETEST_VERSION} LANGUAGES CXX C)
 endif()
-cmake_minimum_required(VERSION 2.6.4)
+cmake_minimum_required(VERSION 3.5)
 
 if (POLICY CMP0063) # Visibility
   cmake_policy(SET CMP0063 NEW)