diff --git a/.gitmodules b/.gitmodules
index 9cab4c8..6650852 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -10,3 +10,6 @@
 [submodule "onchain/lib/pt-v5-twab-controller"]
 	path = onchain/lib/pt-v5-twab-controller
 	url = https://github.com/GenerationSoftware/pt-v5-twab-controller
+[submodule "onchain/lib/openzeppelin-contracts"]
+	path = onchain/lib/openzeppelin-contracts
+	url = https://github.com/openzeppelin/openzeppelin-contracts
diff --git a/onchain/lib/openzeppelin-contracts b/onchain/lib/openzeppelin-contracts
new file mode 160000
index 0000000..dc44c9f
--- /dev/null
+++ b/onchain/lib/openzeppelin-contracts
@@ -0,0 +1 @@
+Subproject commit dc44c9f1a4c3b10af99492eed84f83ed244203f6