diff --git a/deps/boost/CMakeLists.txt b/deps/boost/CMakeLists.txt
index dd41c52a9..c41ce041a 100644
--- a/deps/boost/CMakeLists.txt
+++ b/deps/boost/CMakeLists.txt
@@ -31,7 +31,8 @@ else()
   set(BOOST_REQUIRED_VERSION 1.74)
 endif()
 
-find_package(Boost ${BOOST_REQUIRED_VERSION} REQUIRED system filesystem program_options iostreams regex)
+# Boost.System is header-only since 1.69; do not require it explicitly.
+find_package(Boost ${BOOST_REQUIRED_VERSION} REQUIRED COMPONENTS filesystem program_options iostreams regex)
 
 if(NOT Boost_FOUND)
   if(NOT DEFINED ENV{Boost_ROOT} AND NOT DEFINED Boost_DIR AND NOT DEFINED BOOST_ROOT AND NOT DEFINED BOOSTROOT)