diff --git a/CMakeLists.txt b/CMakeLists.txt
index eeee01af..802af85e 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -8,7 +8,7 @@ set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "${CMAKE_SOURCE_DIR}/cmake/")
 # ----
 
 # git submodule update --init
-find_package(Git)
+find_package(Git REQUIRED)
 execute_process(
   COMMAND ${GIT_EXECUTABLE} submodule update --init
   WORKING_DIRECTORY ${PROJECT_SOURCE_DIR}