diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..9399954
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,12 @@
+[submodule "cbor"]
+	path = cbor
+	url = git@github.com:dr-bonez/cbor.git
+[submodule "json-patch"]
+	path = json-patch
+	url = git@github.com:dr-bonez/json-patch.git
+[submodule "json-ptr"]
+	path = json-ptr
+	url = git@github.com:dr-bonez/json-ptr.git
+[submodule "qutex"]
+	path = qutex
+	url = git@github.com:dr-bonez/qutex.git
diff --git a/Cargo.toml b/Cargo.toml
index ea93a0b..7c73749 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -3,4 +3,8 @@ members = [
     "patch-db",
     "patch-db-derive",
     "patch-db-derive-internals",
+    "cbor",
+    "json-patch",
+    "json-ptr",
+    "qutex",
 ]
diff --git a/cbor b/cbor
new file mode 160000
index 0000000..1debea3
--- /dev/null
+++ b/cbor
@@ -0,0 +1 @@
+Subproject commit 1debea3d05316b2e4a1ad6b82b8996cf2aaa890f
diff --git a/json-patch b/json-patch
new file mode 160000
index 0000000..a2c345b
--- /dev/null
+++ b/json-patch
@@ -0,0 +1 @@
+Subproject commit a2c345bd1e4af73de0ce86cbf6724e0c0f867ace
diff --git a/json-ptr b/json-ptr
new file mode 160000
index 0000000..b2da19f
--- /dev/null
+++ b/json-ptr
@@ -0,0 +1 @@
+Subproject commit b2da19fe6acd754228ebacc3ade51321240bc74a
diff --git a/patch-db/Cargo.toml b/patch-db/Cargo.toml
index dbcbd4f..eb69ba3 100644
--- a/patch-db/Cargo.toml
+++ b/patch-db/Cargo.toml
@@ -10,13 +10,13 @@ edition = "2018"
 async-trait = "0.1.42"
 fd-lock-rs = "0.1.3"
 futures = "0.3.8"
-json-patch = { path = "../../json-patch" }
-json-ptr = { path = "../../json-ptr" }
+json-patch = { path = "../json-patch" }
+json-ptr = { path = "../json-ptr" }
 nix = "0.20.0"
-qutex-2 = { path = "../../qutex" }
+qutex-2 = { path = "../qutex" }
 serde = { version = "1.0.118", features = ["rc"] }
 serde_json = "1.0.61"
-serde_cbor = { git = "https://github.com/dr-bonez/cbor.git" }
+serde_cbor = { path = "../cbor" }
 thiserror = "1.0.23"
 tokio = { version = "1.0.1", features = ["sync", "fs", "rt", "io-util", "macros"] }
 
diff --git a/patch-db/src/lib.rs b/patch-db/src/lib.rs
index e001553..6e3ad53 100644
--- a/patch-db/src/lib.rs
+++ b/patch-db/src/lib.rs
@@ -880,8 +880,8 @@ impl Locker {
     async fn add_write_lock<S: AsRef<str> + Clone, V: SegList + Clone>(
         &self,
         ptr: &JsonPointer<S, V>,
-        locks: &mut Vec<(JsonPointer, LockerGuard)>,
-        extra_locks: &mut [&mut [(JsonPointer, LockerGuard)]],
+        locks: &mut Vec<(JsonPointer, LockerGuard)>, // tx locks
+        extra_locks: &mut [&mut [(JsonPointer, LockerGuard)]], // tx parent locks
     ) {
         let mut final_lock = None;
         for lock in extra_locks
@@ -900,7 +900,7 @@ impl Locker {
                 lock.1 = match guard {
                     LockerGuard::Read(LockerReadGuard(guard)) if !remainder.is_empty() => {
                         // read guard already exists at higher level
-                        let mut lock = guard.try_lock().unwrap();
+                        let mut lock = guard.lock().await;
                         if let Some(l) = lock.take() {
                             let mut orig_lock = None;
                             let mut lock = ReadGuard::upgrade(l).await.unwrap();
diff --git a/qutex b/qutex
new file mode 160000
index 0000000..5e9c912
--- /dev/null
+++ b/qutex
@@ -0,0 +1 @@
+Subproject commit 5e9c9124d4a2378d9ab85d072d61bcc255f75cf5