diff --git a/CMakeLists.txt b/CMakeLists.txt
index 143435246fdb8fe1737dcd4790ed3597b9b09e4c..52ea6be811ac10fa826df6fc85e006e65a9e5ff1 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -54,6 +54,14 @@ if(WITH_MPI)
 endif()
 
 
+include(FetchContent)
+
+FetchContent_Declare(json URL https://github.com/nlohmann/json/releases/download/v3.11.3/json.tar.xz)
+FetchContent_MakeAvailable(json)
+
+target_link_libraries(${PROJECT_NAME} PRIVATE nlohmann_json::nlohmann_json)
+
+
 add_subdirectory(src)