diff --git a/CMakeLists.txt b/CMakeLists.txt
index f3e991b..3f78a9d 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -11,7 +11,7 @@ include_directories(
 )
 
 find_package(cpr)
-find_package(Boost 1.81 COMPONENTS program_options unit_test_framework REQUIRED)
+find_package(Boost 1.75 COMPONENTS program_options unit_test_framework REQUIRED)
 
 set(Boost_USE_STATIC_LIBS ON)