diff --git a/lib/nlohmann_json/CMakeLists.txt b/lib/nlohmann_json/CMakeLists.txt
index cd30eaff..a12489a9 100644
--- a/lib/nlohmann_json/CMakeLists.txt
+++ b/lib/nlohmann_json/CMakeLists.txt
@@ -4,7 +4,11 @@
 
 project(nlohmann_json VERSION 3.11.2)
 
+if(NOT TARGET nlohmann_json)
+
 add_library(${PROJECT_NAME} INTERFACE)
 target_include_directories(${PROJECT_NAME} INTERFACE "${CMAKE_CURRENT_SOURCE_DIR}/include")
 
-add_library(${PROJECT_NAME}::${PROJECT_NAME} ALIAS ${PROJECT_NAME})
\ No newline at end of file
+add_library(${PROJECT_NAME}::${PROJECT_NAME} ALIAS ${PROJECT_NAME})
+
+endif()
\ No newline at end of file