diff --git a/CMakeLists.txt b/CMakeLists.txt
index e5fbc69d1ae1ce210c565ab899fd2ddac7d9d216..ca6f7903a3f122cd9845023cb2fdae261f7cee4c 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -26,6 +26,9 @@ if(${BUILD_TEST})
     cat("${CMAKE_SUPPORT_DIR}/gtest_CMakeLists.txt.in" ${DEPS_TMP_FILE})
 endif(${BUILD_TEST})
 
+## cJson
+cat("${CMAKE_SUPPORT_DIR}/cjson_CMakeLists.txt.in" ${DEPS_TMP_FILE})
+
 ## download dependencies
 configure_file(${DEPS_TMP_FILE} "${CMAKE_SOURCE_DIR}/deps/deps-download/CMakeLists.txt")
 execute_process(COMMAND "${CMAKE_COMMAND}" -G "${CMAKE_GENERATOR}" .
diff --git a/cmake/cjson_CMakeLists.txt.in b/cmake/cjson_CMakeLists.txt.in
new file mode 100644
index 0000000000000000000000000000000000000000..6c67e36d399a67b087be8c2f42f3479e4cbf400f
--- /dev/null
+++ b/cmake/cjson_CMakeLists.txt.in
@@ -0,0 +1,12 @@
+
+# cjson
+ExternalProject_Add(cjson
+        GIT_REPOSITORY git@github.com:taosdata/cJSON.git
+        GIT_TAG v1.7.15
+        SOURCE_DIR "${CMAKE_SOURCE_DIR}/deps/cJson"
+        BINARY_DIR "${CMAKE_BINARY_DIR}/cJson-build"
+        CONFIGURE_COMMAND ""
+        BUILD_COMMAND ""
+        INSTALL_COMMAND ""
+        TEST_COMMAND ""
+        )
\ No newline at end of file
diff --git a/deps/CMakeLists.txt b/deps/CMakeLists.txt
index 2bb75b07c96e61097decd57eb09895a836d2922c..bb3a1c2bbcf9b1064ec6d852fd55645765b55c9a 100644
--- a/deps/CMakeLists.txt
+++ b/deps/CMakeLists.txt
@@ -1,3 +1,5 @@
 if(${BUILD_TEST})
     add_subdirectory(googletest)
 endif(${BUILD_TEST})
+
+add_subdirectory(cJson)