diff --git a/CMakeLists.txt b/CMakeLists.txt
index 6b572f0..e9c6e18 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -16,7 +16,7 @@ message(STATUS "Using ${CMAKE_CXX_COMPILER}")
 
 if (NOT EXISTS ${CMAKE_BINARY_DIR}/conanbuildinfo.cmake)
     message(WARNING "The file conanbuildinfo.cmake doesn't exist, running conan install.")
-    execute_process(COMMAND conan install ${CMAKE_SOURCE_DIR} --install-folder=${CMAKE_BINARY_DIR} --build missing -s compiler=clang -s compiler.libcxx=libstdc++11 -s compiler.version=9)
+    execute_process(COMMAND conan install ${CMAKE_SOURCE_DIR} --install-folder=${CMAKE_BINARY_DIR} --build missing -s compiler=clang -s compiler.libcxx=libstdc++11 -s compiler.version=8)
 endif ()
 include(${CMAKE_BINARY_DIR}/conanbuildinfo.cmake)
 conan_basic_setup()