diff --git a/3rd/cjson/CMakeLists.txt b/3rd/cjson/CMakeLists.txt
index 339b502b..fa990b19 100644
--- a/3rd/cjson/CMakeLists.txt
+++ b/3rd/cjson/CMakeLists.txt
@@ -14,6 +14,7 @@ set(CMAKE_POSITION_INDEPENDENT_CODE ON)
 
 add_library(
     cjson
+    STATIC
     ${CMAKE_CURRENT_LIST_DIR}/src/cJSON.c
     ${CMAKE_CURRENT_LIST_DIR}/src/cJSONw.cpp
 )