--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -10,7 +10,7 @@
   set(CMAKE_AUTOUIC ON)
 endif(USE_QT_GUI)
 
-find_package(Boost
+find_package(Boost 1.69.0
   CONFIG
   REQUIRED
   filesystem
@@ -19,7 +19,6 @@
   date_time
   iostreams
   OPTIONAL_COMPONENTS
-  system
   )
 find_package(CURL 7.55.0 REQUIRED)
 find_package(Jsoncpp REQUIRED)