diff --git a/CMakeLists.txt b/CMakeLists.txt
index e4c7d668..880aa5d0 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.19)
+cmake_minimum_required(VERSION 3.1)
 
 PROJECT(Zano)
 
@@ -186,7 +186,7 @@ endif()
 
 
 # always use system-wide Boost (unless ZANO_USE_SYSTEM_BOOST is defined for some reason, which is not recommended)
-if(not DEFINED ENV{ZANO_USE_SYSTEM_BOOST})
+if(NOT DEFINED ENV{ZANO_USE_SYSTEM_BOOST})
   set(Boost_NO_SYSTEM_PATHS ON)
 endif()
 
@@ -212,8 +212,10 @@ if(CMAKE_SYSTEM_NAME STREQUAL "iOS")
 elseif(CMAKE_SYSTEM_NAME STREQUAL "Android")
   set(Boost_LIBRARY_DIRS "${Boost_LIBRARY_DIRS}/${CMAKE_ANDROID_ARCH_ABI}/")
   set(Boost_LIBRARIES "${Boost_LIBRARY_DIRS}libboost_system.a;${Boost_LIBRARY_DIRS}libboost_filesystem.a;${Boost_LIBRARY_DIRS}libboost_thread.a;${Boost_LIBRARY_DIRS}libboost_timer.a;${Boost_LIBRARY_DIRS}libboost_date_time.a;${Boost_LIBRARY_DIRS}libboost_chrono.a;${Boost_LIBRARY_DIRS}libboost_regex.a;${Boost_LIBRARY_DIRS}libboost_serialization.a;${Boost_LIBRARY_DIRS}libboost_atomic.a;${Boost_LIBRARY_DIRS}libboost_program_options.a")
+elseif(APPLE)
+  find_package(Boost 1.71 EXACT REQUIRED COMPONENTS system filesystem thread timer date_time chrono regex serialization atomic program_options locale)
 else()
-  find_package(Boost 1.70...1.71 REQUIRED COMPONENTS system filesystem thread timer date_time chrono regex serialization atomic program_options locale)
+  find_package(Boost 1.70 EXACT REQUIRED COMPONENTS system filesystem thread timer date_time chrono regex serialization atomic program_options locale)
 endif()