diff --git a/Cargo.toml b/Cargo.toml
index f5ddd3f..d59366f 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -9,10 +9,13 @@ edition = "2018"
 crate-type = ["cdylib"]
 
 [dependencies]
-bdk = { version = "^0.11", features = ["all-keys"] }
+bdk = { version = "^0.12.1-dev", features = ["all-keys"] }
 uniffi_macros = "0.14.0"
 uniffi = "0.14.0"
 thiserror = "1.0"
 
 [build-dependencies]
 uniffi_build = "0.14.0"
+
+[patch.crates-io]
+bdk = { git = "https://github.com/artfuldev/bdk.git", branch = "use-send-and-sync-on-memory-database" }
diff --git a/src/lib.rs b/src/lib.rs
index 2b89c53..5d8cd69 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,28 +1,26 @@
 use bdk::bitcoin::Network;
-use bdk::sled;
-use bdk::sled::Tree;
+use bdk::database::MemoryDatabase;
 use bdk::wallet::AddressIndex;
 use bdk::Error;
 use bdk::Wallet;
+
 use std::sync::Mutex;
 
 type BdkError = Error;
 
 uniffi_macros::include_scaffolding!("bdk");
-
 struct OfflineWallet {
-    wallet: Mutex<Wallet<(), Tree>>,
+    wallet: Mutex<Wallet<(), MemoryDatabase>>,
 }
 
 impl OfflineWallet {
     fn new(descriptor: String) -> Result<Self, BdkError> {
-        let database = sled::open("testdb").unwrap();
-        let tree = database.open_tree("test").unwrap();
+        let database = MemoryDatabase::default();
         let wallet = Mutex::new(Wallet::new_offline(
             &descriptor,
             None,
             Network::Regtest,
-            tree,
+            database,
         )?);
         Ok(OfflineWallet { wallet })
     }