diff -Nrup a/cmake/Modules/FindPROJ.cmake b/cmake/Modules/FindPROJ.cmake
--- a/cmake/Modules/FindPROJ.cmake	1970-01-01 01:00:00.000000000 +0100
+++ b/cmake/Modules/FindPROJ.cmake	2021-05-26 06:16:20.590025388 +0200
@@ -0,0 +1,91 @@
+# - Try to find PROJ
+# Once done this will define
+#
+#  PROJ_FOUND - system has PROJ
+#  PROJ_INCLUDE_DIRS - the PROJ include directory
+#  PROJ_LIBRARIES - Link these to use PROJ
+#  PROJ_DEFINITIONS - Compiler switches required for using PROJ
+#
+#  Copyright (c) 2009 Andreas Schneider <mail@cynapses.org>
+#
+#  Redistribution and use is allowed according to the terms of the New
+#  BSD license.
+#  For details see the accompanying COPYING-CMAKE-SCRIPTS file.
+#
+
+
+if (PROJ_LIBRARIES AND PROJ_INCLUDE_DIRS)
+  # in cache already
+  set(PROJ_FOUND TRUE)
+else (PROJ_LIBRARIES AND PROJ_INCLUDE_DIRS)
+
+  find_path(PROJ_INCLUDE_DIR
+    NAMES
+      proj_api.h
+    PATHS
+if(WIN32)	
+      ${PROJ_DEV_PATH}/include
+endif(WIN32)
+        /usr/include
+        /usr/local/include
+        /opt/local/include
+        /sw/include
+        ${CMAKE_INSTALL_PREFIX}/include
+        ${CMAKE_SOURCE_DIR}/Win32/GDAL/include
+    PATH_SUFFIXES
+        proj
+
+  )
+  mark_as_advanced(PROJ_INCLUDE_DIR)
+
+  find_library(LIBPROJ_LIBRARY
+    NAMES
+        proj
+        proj_i
+    PATHS
+if(WIN32)	
+      ${PROJ_DEV_PATH}/lib
+endif(WIN32)
+        /usr/lib
+        /usr/local/lib
+        /opt/local/lib
+        /sw/lib
+        ${CMAKE_INSTALL_PREFIX}/lib
+        ${CMAKE_SOURCE_DIR}/Win32/GDAL/lib
+  )
+  mark_as_advanced(LIBPROJ_LIBRARY)
+
+  if (LIBPROJ_LIBRARY)
+    set(LIBPROJ_FOUND TRUE)
+  endif (LIBPROJ_LIBRARY)
+
+  set(PROJ_INCLUDE_DIRS
+    ${PROJ_INCLUDE_DIR}
+  )
+
+  if (LIBPROJ_FOUND)
+    set(PROJ_LIBRARIES
+      ${PROJ_LIBRARIES}
+      ${LIBPROJ_LIBRARY}
+    )
+  endif (LIBPROJ_FOUND)
+
+  if (PROJ_INCLUDE_DIRS AND PROJ_LIBRARIES)
+     set(PROJ_FOUND TRUE)
+  endif (PROJ_INCLUDE_DIRS AND PROJ_LIBRARIES)
+
+  if (PROJ_FOUND)
+    if (NOT PROJ_FIND_QUIETLY)
+      message(STATUS "Found PROJ: ${PROJ_LIBRARIES}")
+    endif (NOT PROJ_FIND_QUIETLY)
+  else (PROJ_FOUND)
+    if (PROJ_FIND_REQUIRED)
+      message(FATAL_ERROR "Could not find PROJ")
+    endif (PROJ_FIND_REQUIRED)
+  endif (PROJ_FOUND)
+
+  # show the PROJ_INCLUDE_DIRS and PROJ_LIBRARIES variables only in the advanced view
+  mark_as_advanced(PROJ_INCLUDE_DIRS PROJ_LIBRARIES)
+
+endif (PROJ_LIBRARIES AND PROJ_INCLUDE_DIRS)
+
diff -Nrup a/CMakeLists.txt b/CMakeLists.txt
--- a/CMakeLists.txt	2021-05-24 11:18:08.000000000 +0200
+++ b/CMakeLists.txt	2021-05-26 06:14:07.845073934 +0200
@@ -151,7 +151,7 @@ find_package(Qt5WebEngineWidgets    REQU
 find_package(Qt5Qml                 REQUIRED)
 find_package(Qt5Help                REQUIRED)
 find_package(GDAL                   REQUIRED)
-find_package(PROJ                   REQUIRED)
+find_package(PROJ                  REQUIRED)
 find_package(JPEG                   REQUIRED)
 find_package(ROUTINO                REQUIRED)
 find_package(QuaZip-Qt5             REQUIRED)
@@ -162,9 +162,9 @@ if(${Qt5Widgets_VERSION} VERSION_LESS 5.
     message( SEND_ERROR "You need at least Qt5.8 or newer.")
 endif()
 
-if(${PROJ_VERSION} VERSION_LESS 7.2.1)
-    message( SEND_ERROR "You need at least PROJ 7.2.1 or newer.")
-endif()
+#if(${PROJ_VERSION} VERSION_LESS 7.2.1)
+#    message( SEND_ERROR "You need at least PROJ 7.2.1 or newer.")
+#endif()
 
 if(USE_QT5DBus)
     find_package(Qt5DBus REQUIRED)