diff --git a/.gitmodules b/.gitmodules
index 13b67848..37e266dc 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -14,3 +14,6 @@
 [submodule "DRAMSys/library/src/common/third_party/sqlite-amalgamation"]
 	path = DRAMSys/library/src/common/third_party/sqlite-amalgamation
 	url = https://github.com/azadkuh/sqlite-amalgamation.git
+[submodule "DRAMSys/library/src/common/third_party/nlohmann"]
+	path = DRAMSys/library/src/common/third_party/nlohmann
+	url = https://github.com/nlohmann/json
diff --git a/DRAMSys/library/src/common/third_party/nlohmann b/DRAMSys/library/src/common/third_party/nlohmann
new file mode 160000
index 00000000..b7be613b
--- /dev/null
+++ b/DRAMSys/library/src/common/third_party/nlohmann
@@ -0,0 +1 @@
+Subproject commit b7be613b6ec6269c829144ff1cc8a633876d3092