diff --git a/.gitmodules b/.gitmodules
index 5c7d5d6..7e68c42 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -1,6 +1,6 @@
 [submodule "contracts/lib/forge-std"]
 	path = contracts/lib/forge-std
-	url = https://github.com/foundry-rs/forge-std
+	url = https://github.com/foundry-rs/forge-std.git
 [submodule "contracts/lib/openzeppelin-contracts"]
 	path = contracts/lib/openzeppelin-contracts
-	url = https://github.com/OpenZeppelin/openzeppelin-contracts
+	url = https://github.com/OpenZeppelin/openzeppelin-contracts.git
diff --git a/contracts/lib/forge-std b/contracts/lib/forge-std
new file mode 160000
index 0000000..bb4ceea
--- /dev/null
+++ b/contracts/lib/forge-std
@@ -0,0 +1 @@
+Subproject commit bb4ceea94d6f10eeb5b41dc2391c6c8bf8e734ef
diff --git a/contracts/lib/openzeppelin-contracts b/contracts/lib/openzeppelin-contracts
new file mode 160000
index 0000000..6ae2c17
--- /dev/null
+++ b/contracts/lib/openzeppelin-contracts
@@ -0,0 +1 @@
+Subproject commit 6ae2c17bfe9317de1702b5873d694595ac002c93