diff --git a/CMakeLists.txt b/CMakeLists.txt
index 91767f2481..a457409968 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -43,7 +43,7 @@ if(${CMAKE_VERSION} VERSION_GREATER_EQUAL 4)
 endif()
 
 # Define minimum cmake version
-cmake_minimum_required(VERSION 3.12 FATAL_ERROR)
+cmake_minimum_required(VERSION 3.16.3 FATAL_ERROR)
 
 
 # Define minimum compiler versions
@@ -61,26 +61,6 @@ elseif(CMAKE_BUILD_TYPE STREQUAL "Release_O3")
 endif()
 message("-- Build type is set to ${CMAKE_BUILD_TYPE}")
 
-# Set certain policies to NEW
-foreach(p
-  CMP0003 # CMake 2.6.0
-  CMP0012 # CMake 2.8.0
-  CMP0022 # CMake 2.8.12
-  CMP0025 # CMake 3.0
-  CMP0042 # CMake 3.0
-  CMP0048 # CMake 3.0
-  CMP0051 # CMake 3.1
-  CMP0054 # CMake 3.1
-  CMP0060 # CMake 3.16.2
-  CMP0063 # CMake 3.3.2
-  CMP0068 # CMake 3.9.1
-  CMP0074 # CMake 3.12
-  )
-  if(POLICY ${p})
-    cmake_policy(SET ${p} NEW)
-  endif()
-endforeach()
-
 # Set the project name, enabling C, C++ and Fortran support
 project(gambit C CXX Fortran)
 
@@ -337,11 +317,7 @@ endif()
 
 # Fix Boost < 1.55 for Clang
 if("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang" OR "${CMAKE_CXX_COMPILER_ID}" STREQUAL "AppleClang")
-  if(${CMAKE_VERSION} VERSION_LESS 3.12.0)
-    add_definitions(-DBOOST_PP_VARIADICS=1)
-  else()
-    add_compile_definitions(BOOST_PP_VARIADICS=1)
-  endif()
+  add_compile_definitions(BOOST_PP_VARIADICS=1)
 endif()
 
 # Check for Eigen
@@ -508,22 +484,14 @@ option(SUPPRESS_LIBRARY_WARNINGS "Suppress common compiler warnings due to exter
 string(FIND ${CMAKE_CXX_FLAGS} "-rdynamic" FOUND_RDYNAMIC_CXX)
 string(FIND ${CMAKE_CXX_FLAGS} "--export-dynamic" FOUND_EXPORT_DYNAMIC_CXX)
 if(${FOUND_RDYNAMIC_CXX} EQUAL -1 AND ${FOUND_EXPORT_DYNAMIC_CXX} EQUAL -1)
-  if(${CMAKE_MAJOR_VERSION} MATCHES "2")
-    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fvisibility=hidden -fvisibility-inlines-hidden")
-  else()
-    set(CMAKE_CXX_VISIBILITY_PRESET hidden)
-    set(CMAKE_VISIBILITY_INLINES_HIDDEN TRUE)
-  endif()
+  set(CMAKE_CXX_VISIBILITY_PRESET hidden)
+  set(CMAKE_VISIBILITY_INLINES_HIDDEN TRUE)
 endif()
 
 string(FIND ${CMAKE_Fortran_FLAGS} "-rdynamic" FOUND_RDYNAMIC_FORTRAN)
 string(FIND ${CMAKE_Fortran_FLAGS} "--export-dynamic" FOUND_EXPORT_DYNAMIC_FORTRAN)
 if(${FOUND_RDYNAMIC_FORTRAN} EQUAL -1 AND ${FOUND_EXPORT_DYNAMIC_FORTRAN} EQUAL -1)
-  if(${CMAKE_MAJOR_VERSION} MATCHES "2")
-    set(CMAKE_Fortran_FLAGS "${CMAKE_Fortran_FLAGS} -fvisibility=hidden")
-  else()
-    set(CMAKE_Fortran_VISIBILITY_PRESET hidden)
-  endif()
+  set(CMAKE_Fortran_VISIBILITY_PRESET hidden)
 endif()
 
 # Forbid the use of variable-length array and other non-standard C++ syntax
diff --git a/ScannerBit/python/cmake/boost_python_install.cmake b/ScannerBit/python/cmake/boost_python_install.cmake
index cb5a69ce95..96fd818750 100644
--- a/ScannerBit/python/cmake/boost_python_install.cmake
+++ b/ScannerBit/python/cmake/boost_python_install.cmake
@@ -1,4 +1,4 @@
-CMAKE_MINIMUM_REQUIRED(VERSION 3.12 FATAL_ERROR)
+CMAKE_MINIMUM_REQUIRED(VERSION 3.16.3 FATAL_ERROR)
 
 find_package(Python3 REQUIRED COMPONENTS Interpreter Development)
 FIND_PACKAGE(NumPy) 
diff --git a/cmake/utilities.cmake b/cmake/utilities.cmake
index b02f22719a..68c960efce 100644
--- a/cmake/utilities.cmake
+++ b/cmake/utilities.cmake
@@ -187,11 +187,7 @@ endfunction()
 
 # Function to make symbols visible for a code component
 function(make_symbols_visible lib)
-  if(${CMAKE_MAJOR_VERSION} MATCHES "2")
-    set_target_properties(${lib} PROPERTIES COMPILE_OPTIONS "-fvisibility=default")
-  else()
-    set_target_properties(${lib} PROPERTIES CXX_VISIBILITY_PRESET default)
-  endif()
+  set_target_properties(${lib} PROPERTIES CXX_VISIBILITY_PRESET default)
 endfunction()
 
 # Function to reset the install_name of a library compiled in an external project on OSX
@@ -218,15 +214,9 @@ function(add_gambit_library libraryname)
   add_dependencies(${libraryname} module_harvest)
   add_dependencies(${libraryname} yaml-cpp)
 
-  if(${CMAKE_VERSION} VERSION_GREATER 2.8.10)
-    foreach (dir ${GAMBIT_INCDIRS})
-      target_include_directories(${libraryname} PUBLIC ${dir})
-    endforeach()
-  else()
-    foreach (dir ${GAMBIT_INCDIRS})
-      include_directories(${dir})
-    endforeach()
-  endif()
+  foreach (dir ${GAMBIT_INCDIRS})
+    target_include_directories(${libraryname} PUBLIC ${dir})
+  endforeach()
 
   if(${ARG_OPTION} STREQUAL SHARED AND APPLE)
     set_property(TARGET ${libraryname} PROPERTY SUFFIX .so)
@@ -318,16 +308,10 @@ function(add_gambit_executable executablename LIBRARIES)
     ENABLE_EXPORTS TRUE
   )
 
-  if(${CMAKE_VERSION} VERSION_GREATER 2.8.10)
-    foreach (dir ${GAMBIT_INCDIRS})
-      target_include_directories(${executablename} PUBLIC ${dir})
-    endforeach()
-  else()
-    foreach (dir ${GAMBIT_INCDIRS})
-      include_directories(${dir})
-    endforeach()
-  endif()
-
+  foreach (dir ${GAMBIT_INCDIRS})
+    target_include_directories(${executablename} PUBLIC ${dir})
+  endforeach()
+  
   if(MPI_CXX_FOUND)
     set(LIBRARIES ${LIBRARIES} ${MPI_CXX_LIBRARIES})
     if(MPI_CXX_LINK_FLAGS)
diff --git a/gum/CMakeLists.txt b/gum/CMakeLists.txt
index 79e8c82850..1cc1687d05 100644
--- a/gum/CMakeLists.txt
+++ b/gum/CMakeLists.txt
@@ -20,7 +20,7 @@
 #
 #  **************************************
 
-cmake_minimum_required(VERSION 3.12 FATAL_ERROR)
+cmake_minimum_required(VERSION 3.16.3 FATAL_ERROR)
 project(GUM)
 message("   Building GUM in ${CMAKE_CURRENT_SOURCE_DIR}")
 include(ExternalProject)
@@ -42,13 +42,6 @@ else()
   set(dashi "-i")
 endif()
 
-# Set a consistent MACOSX_RPATH default across all CMake versions.
-# When CMake 2.8.12 is required, change this default to 1.
-# When CMake 3.0.0 is required, remove this block (see CMP0042).
-if(NOT DEFINED CMAKE_MACOSX_RPATH)
-  set(CMAKE_MACOSX_RPATH 0)
-endif()
-
 # Check for Mathematica
 include(../cmake/FindMathematica.cmake)
 if(Mathematica_FOUND)