diff --git a/.gitmodules b/.gitmodules
index 349bf872..ce99cd48 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -1,3 +1,6 @@
 [submodule "contrib/miniupnp"]
 	path = contrib/miniupnp
 	url = https://github.com/miniupnp/miniupnp
+[submodule "contrib\\db\\libmdbx"]
+	path = contrib\\db\\libmdbx
+	url = https://github.com/leo-yuriev/libmdbx.git
diff --git a/contrib/db/libmdbx b/contrib/db/libmdbx
new file mode 160000
index 00000000..d24df41a
--- /dev/null
+++ b/contrib/db/libmdbx
@@ -0,0 +1 @@
+Subproject commit d24df41a67a3d82bda1c7986ffef1ebff361f430