diff --git a/.gitmodules b/.gitmodules
index 82647b71..60369680 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -5,3 +5,6 @@
 	path = DRAMSys/library/src/common/third_party/DRAMPower
 	url = https://github.com/tukl-msd/DRAMPower.git
 	branch = master
+[submodule "DRAMSys/library/src/common/third_party/json"]
+	path = DRAMSys/library/src/common/third_party/json
+	url = https://github.com/nlohmann/json.git