diff --git a/CMakeLists.txt b/CMakeLists.txt
index 7362d9187874f090b1b22c27861c601fb6803ceb..507ade4e8f97944b9f05e03f898f3a7eb53c0781 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -194,8 +194,8 @@ if(EXTERNAL_BOOST)
     message(STATUS "Boost_LIBRARY_DIRS: ${Boost_LIBRARY_DIRS}")
     message(STATUS "Boost_INCLUDE_DIRS: ${Boost_INCLUDE_DIRS}")
 else(EXTERNAL_BOOST)
-    set(Boost_URL "https://boostorg.jfrog.io/artifactory/main/release/1.74.0/source/boost_1_74_0.tar.bz2")
-    set(Boost_SHA256 "83bfc1507731a0906e387fc28b7ef5417d591429e51e788417fe9ff025e116b1")
+    set(Boost_URL "https://sourceforge.net/projects/boost/files/boost/1.68.0/boost_1_68_0.tar.bz2/download")
+    set(Boost_SHA1 "18863a7cae4d58ae85eb63d400f774f60a383411")
     set(Boost_INSTALL_DIR ${CMAKE_CURRENT_BINARY_DIR}/external/boost)
     set(Boost_INCLUDE_DIRS ${Boost_INSTALL_DIR}/include)
     set(Boost_LIBRARY_DIRS ${CMAKE_CURRENT_LIST_DIR}/lib/boost/)