diff --git a/.gitmodules b/.gitmodules
index 05b317fb278..e69ac7dac52 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -1,23 +1,27 @@
-[submodule "packages/protocol/lib/solmate"]
-	path = packages/protocol/lib/solmate
-	url = https://github.com/rari-capital/solmate
-	branch = v1.5.0
+# We shall favor using specific git tags or commit hashes to ensure code stability;
+# Try to avoid depending on branches whose code may change unexpectedly.
+
 [submodule "packages/protocol/lib/openzeppelin-contracts-upgradeable"]
 	path = packages/protocol/lib/openzeppelin-contracts-upgradeable
 	url = https://github.com/OpenZeppelin/openzeppelin-contracts-upgradeable
-	branch = v4.8.2
+	tag = v4.8.2
+
 [submodule "packages/protocol/lib/openzeppelin-contracts"]
 	path = packages/protocol/lib/openzeppelin-contracts
 	url = https://github.com/OpenZeppelin/openzeppelin-contracts
-	branch = v4.8.2
+	tag = v4.8.2
+
 [submodule "packages/protocol/lib/forge-std"]
 	path = packages/protocol/lib/forge-std
 	url = https://github.com/foundry-rs/forge-std
-	branch = chore/v1.5.1
+	tag = v1.5.1
+
 [submodule "packages/protocol/lib/solady"]
 	path = packages/protocol/lib/solady
 	url = https://github.com/Vectorized/solady
+	tag = v0.0.167
+
 [submodule "packages/protocol/lib/p256-verifier"]
 	path = packages/protocol/lib/p256-verifier
 	url = https://github.com/taikoxyz/p256-verifier
-	branch = use_at_taiko
+	branch = use_at_taiko # a protected branch maintained by Taiko.
\ No newline at end of file
diff --git a/packages/protocol/lib/forge-std b/packages/protocol/lib/forge-std
index b1cf2603743..73a504d2cf6 160000
--- a/packages/protocol/lib/forge-std
+++ b/packages/protocol/lib/forge-std
@@ -1 +1 @@
-Subproject commit b1cf26037432d18fea6917ba82a6fedbff71c037
+Subproject commit 73a504d2cf6f37b7ce285b479f4c681f76e95f1b
diff --git a/packages/protocol/lib/solady b/packages/protocol/lib/solady
index fb11b3e9ea6..9de1fe26af4 160000
--- a/packages/protocol/lib/solady
+++ b/packages/protocol/lib/solady
@@ -1 +1 @@
-Subproject commit fb11b3e9ea6c1aafdbd0a1515ff440509d60bff9
+Subproject commit 9de1fe26af4f4b1bbb4b5efcedc503342fc55ee8