diff --git a/Cargo.toml b/Cargo.toml
index 9f770a43..574ea190 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -7,6 +7,8 @@ members = [
     "bindings/cashu-ffi",
     "bindings/cashu-sdk-ffi"
 ]
+resolver = "2"
+
 
 [workspace.package]
 license = "BSD-3-Clause"
@@ -26,8 +28,8 @@ keywords = ["bitcoin", "e-cash", "cashu"]
 serde = { version = "1.0.160", features = ["derive"]}
 serde_json = "1.0.96"
 url = "2.3.1"
-tokio = { version = "1", default-features = false }
-tracing = "0.1"
+tokio = { version = "1.32", default-features = false }
+tracing = { version = "0.1", default-features = false }
 tracing-subscriber = "0.3"
 uniffi = "0.24"
 
diff --git a/crates/cashu-sdk/Cargo.toml b/crates/cashu-sdk/Cargo.toml
index c9df4a41..1f5639c6 100644
--- a/crates/cashu-sdk/Cargo.toml
+++ b/crates/cashu-sdk/Cargo.toml
@@ -11,8 +11,8 @@ license.workspace = true
 [features]
 default = ["mint", "wallet"]
 mint = ["cashu/mint"]
-blocking = ["once_cell"]
-wallet = ["cashu/wallet", "minreq", "once_cell"]
+blocking = ["dep:once_cell"]
+wallet = ["cashu/wallet", "dep:minreq", "dep:once_cell"]
 
 
 # Fix: Should be minreq or gloo
@@ -31,13 +31,13 @@ tracing = { workspace = true }
 futures-util = { version = "0.3", default-features = false, features = ["sink", "std"] }
 once_cell = { version = "1.17", optional = true }
 
-
 [target.'cfg(not(target_arch = "wasm32"))'.dependencies]
 tokio = { workspace = true, features = ["rt-multi-thread", "time", "macros", "sync"] }
 minreq = { version = "2.7.0", optional = true, features = ["json-using-serde", "https"] }
 
 [target.'cfg(target_arch = "wasm32")'.dependencies]
-tokio = { workspace = true, features = ["rt", "macros", "sync"] }
+tokio = { workspace = true, features = ["rt", "macros", "sync", "time"] }
 gloo = { version = "0.10.0", features = ["net"]}
 
 
+
diff --git a/crates/cashu-sdk/src/lib.rs b/crates/cashu-sdk/src/lib.rs
index b6f8a158..9914c783 100644
--- a/crates/cashu-sdk/src/lib.rs
+++ b/crates/cashu-sdk/src/lib.rs
@@ -1,3 +1,6 @@
+#[cfg(all(target_arch = "wasm32", feature = "blocking"))]
+compile_error!("`blocking` feature can't be enabled for WASM targets");
+
 #[cfg(feature = "blocking")]
 use once_cell::sync::Lazy;
 #[cfg(feature = "blocking")]