diff --git a/.gitmodules b/.gitmodules
index 1f384d5..a4dbebd 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -5,3 +5,6 @@
 [submodule "lib/openzeppelin-contracts-upgradeable"]
 	path = lib/openzeppelin-contracts-upgradeable
 	url = https://github.com/OpenZeppelin/openzeppelin-contracts-upgradeable
+[submodule "lib/openzeppelin-contracts"]
+	path = lib/openzeppelin-contracts
+	url = https://github.com/OpenZeppelin/openzeppelin-contracts
diff --git a/lib/openzeppelin-contracts b/lib/openzeppelin-contracts
new file mode 160000
index 0000000..fd81a96
--- /dev/null
+++ b/lib/openzeppelin-contracts
@@ -0,0 +1 @@
+Subproject commit fd81a96f01cc42ef1c9a5399364968d0e07e9e90