diff --git a/CMakeLists.txt b/CMakeLists.txt
index c0423e18c..ffb5abb82 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -43,7 +43,7 @@ if (IOS)
     INCLUDE(CmakeLists_IOS.txt)
 endif()
 
-cmake_minimum_required(VERSION 2.8.7)
+cmake_minimum_required(VERSION 3.5)
 message(STATUS "CMake version ${CMAKE_VERSION}")
 
 project(monero)
@@ -662,7 +662,7 @@ else()
   set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${ARCH_FLAG}")
 
   set(WARNINGS "-Wall -Wextra -Wpointer-arith -Wundef -Wvla -Wwrite-strings -Wno-error=extra -Wno-error=deprecated-declarations -Wno-unused-parameter -Wno-unused-variable -Wno-error=unused-variable -Wno-error=undef -Wno-error=uninitialized")
-  if(CMAKE_C_COMPILER_ID STREQUAL "Clang")
+  if(CMAKE_C_COMPILER_ID MATCHES "Clang")
     if(ARM)
       set(WARNINGS "${WARNINGS} -Wno-error=inline-asm")
     endif()
@@ -898,7 +898,7 @@ else()
   endif()
   set(USE_LTO ${USE_LTO_DEFAULT} CACHE BOOL "Use Link-Time Optimization (Release mode only)")
 
-  if(CMAKE_CXX_COMPILER_ID STREQUAL "Clang")
+  if(CMAKE_CXX_COMPILER_ID MATCHES "Clang")
     # There is a clang bug that does not allow to compile code that uses AES-NI intrinsics if -flto is enabled, so explicitly disable
     set(USE_LTO false)
   endif()
@@ -1045,7 +1045,7 @@ if(ANDROID)
   set(ATOMIC libatomic.a)
   set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-error=user-defined-warnings")
 endif()
-if(CMAKE_C_COMPILER_ID STREQUAL "Clang" AND ARCH_WIDTH EQUAL "32" AND NOT IOS AND NOT FREEBSD)
+if(CMAKE_C_COMPILER_ID MATCHES "Clang" AND ARCH_WIDTH EQUAL "32" AND NOT IOS AND NOT FREEBSD)
   find_library(ATOMIC atomic)
   if (ATOMIC_FOUND)
     list(APPEND EXTRA_LIBRARIES ${ATOMIC})
diff --git a/cmake/FindCcache.cmake b/cmake/FindCcache.cmake
index 164ddf601..d98518134 100644
--- a/cmake/FindCcache.cmake
+++ b/cmake/FindCcache.cmake
@@ -44,7 +44,7 @@ if (CCACHE_FOUND)
 	# Try to compile a test program with ccache, in order to verify if it really works. (needed on exotic setups)
 	set(TEST_PROJECT "${CMAKE_BINARY_DIR}/${CMAKE_FILES_DIRECTORY}/CMakeTmp")
 	file(WRITE "${TEST_PROJECT}/CMakeLists.txt" [=[
-cmake_minimum_required(VERSION 3.1)
+cmake_minimum_required(VERSION 3.5)
 project(test)
 option (CCACHE "")
 file(WRITE "${CMAKE_SOURCE_DIR}/test.cpp" "int main() { return 0; }")
diff --git a/contrib/epee/demo/CMakeLists.txt b/contrib/epee/demo/CMakeLists.txt
index b4ac2cc8b..d2ae0ed55 100644
--- a/contrib/epee/demo/CMakeLists.txt
+++ b/contrib/epee/demo/CMakeLists.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 2.8)
+cmake_minimum_required(VERSION 3.5)
 set(Boost_USE_MULTITHREADED ON)
 #set(Boost_DEBUG 1) 
 find_package(Boost COMPONENTS system filesystem thread date_time chrono regex )
diff --git a/contrib/epee/tests/src/CMakeLists.txt b/contrib/epee/tests/src/CMakeLists.txt
index 026ed0a26..e724b53f4 100644
--- a/contrib/epee/tests/src/CMakeLists.txt
+++ b/contrib/epee/tests/src/CMakeLists.txt
@@ -1,5 +1,5 @@
 
-cmake_minimum_required(VERSION 2.8)
+cmake_minimum_required(VERSION 3.5)
 
 set(CMAKE_C_STANDARD 11)
 set(CMAKE_C_STANDARD_REQUIRED ON)
diff --git a/external/easylogging++/CMakeLists.txt b/external/easylogging++/CMakeLists.txt
index ab1e571a8..b5b6669d3 100644
--- a/external/easylogging++/CMakeLists.txt
+++ b/external/easylogging++/CMakeLists.txt
@@ -26,7 +26,7 @@
 # STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
 # THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-cmake_minimum_required(VERSION 2.8.7)
+cmake_minimum_required(VERSION 3.5)
 
 project(easylogging CXX)
 
diff --git a/src/cryptonote_protocol/CMakeLists.txt b/src/cryptonote_protocol/CMakeLists.txt
index d28b44bb7..85c25546f 100644
--- a/src/cryptonote_protocol/CMakeLists.txt
+++ b/src/cryptonote_protocol/CMakeLists.txt
@@ -26,7 +26,7 @@
 # STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
 # THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-cmake_minimum_required (VERSION 2.6)
+cmake_minimum_required (VERSION 3.5)
 project (monero CXX)
 
 file(GLOB CRYPTONOTE_PROTOCOL *)
diff --git a/src/p2p/CMakeLists.txt b/src/p2p/CMakeLists.txt
index cfd8273b4..0cd38f253 100644
--- a/src/p2p/CMakeLists.txt
+++ b/src/p2p/CMakeLists.txt
@@ -26,7 +26,7 @@
 # STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
 # THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-cmake_minimum_required (VERSION 2.6)
+cmake_minimum_required (VERSION 3.5)
 project (monero CXX)
 
 file(GLOB P2P *)
diff --git a/tests/gtest/CMakeLists.txt b/tests/gtest/CMakeLists.txt
index 621d0f042..50941b8d8 100644
--- a/tests/gtest/CMakeLists.txt
+++ b/tests/gtest/CMakeLists.txt
@@ -45,7 +45,7 @@ endif()
 # ${gtest_BINARY_DIR}.
 # Language "C" is required for find_package(Threads).
 project(gtest CXX C)
-cmake_minimum_required(VERSION 2.6.2)
+cmake_minimum_required(VERSION 3.5)
 
 if (COMMAND set_up_hermetic_build)
   set_up_hermetic_build()
diff --git a/tests/gtest/cmake/internal_utils.cmake b/tests/gtest/cmake/internal_utils.cmake
index ae45d7d7a..b33197989 100644
--- a/tests/gtest/cmake/internal_utils.cmake
+++ b/tests/gtest/cmake/internal_utils.cmake
@@ -96,7 +96,7 @@ macro(config_compiler_and_linker)
     set(cxx_no_rtti_flags "-fno-rtti -DGTEST_HAS_RTTI=0")
     set(cxx_strict_flags
       "-Wextra -Wno-unused-parameter -Wno-missing-field-initializers")
-  elseif (CMAKE_CXX_COMPILER_ID STREQUAL "Clang")
+  elseif (CMAKE_CXX_COMPILER_ID MATCHES "Clang")
     set(cxx_base_flags "-Wall -Wshadow -fPIC")
     set(cxx_exception_flags "-fexceptions")
     set(cxx_no_exception_flags "-fno-exceptions")
diff --git a/translations/CMakeLists.txt b/translations/CMakeLists.txt
index 0081746f2..7e31ed319 100644
--- a/translations/CMakeLists.txt
+++ b/translations/CMakeLists.txt
@@ -26,7 +26,7 @@
 # STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
 # THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-cmake_minimum_required(VERSION 2.8.7)
+cmake_minimum_required(VERSION 3.5)
 
 project(translations)