Index: CMakeLists.txt
--- CMakeLists.txt.orig
+++ CMakeLists.txt
@@ -162,10 +162,6 @@ if(${Qt5Widgets_VERSION} VERSION_LESS 5.8.0)
     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(USE_QT5DBus)
     find_package(Qt5DBus REQUIRED)
     if(Qt5DBus_FOUND)
