diff --git a/Cargo.toml b/Cargo.toml
index b9a9d96017..26a02c73da 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -16,6 +16,12 @@ description = "Submit extrinsics (transactions) to a substrate node via RPC"
 keywords = ["parity", "substrate", "blockchain"]
 include = ["Cargo.toml", "src/**/*.rs", "README.md", "LICENSE"]
 
+[features]
+default = ["tokio1"]
+# jsonrpsee can be configured to use tokio02 or tokio1.
+tokio02 = ["jsonrpsee-http-client/tokio02", "jsonrpsee-ws-client/tokio02"]
+tokio1 = ["jsonrpsee-http-client/tokio1", "jsonrpsee-ws-client/tokio1"]
+
 [dependencies]
 async-trait = "0.1.49"
 bitvec = { version = "0.20.1", default-features = false, features = ["alloc"] }
@@ -24,10 +30,10 @@ chameleon = "0.1.0"
 scale-info = { version = "1.0.0", features = ["bit-vec"] }
 futures = "0.3.13"
 hex = "0.4.3"
-jsonrpsee-proc-macros = "0.4.1"
-jsonrpsee-ws-client = { version = "0.4.1", default-features = false }
-jsonrpsee-http-client = { version = "0.4.1", default-features = false }
-jsonrpsee-types = "0.4.1"
+jsonrpsee-proc-macros = "0.3.0"
+jsonrpsee-ws-client = { version = "0.3.0", default-features = false }
+jsonrpsee-http-client = { version = "0.3.0", default-features = false }
+jsonrpsee-types = "0.3.0"
 log = "0.4.14"
 num-traits = { version = "0.2.14", default-features = false }
 serde = { version = "1.0.124", features = ["derive"] }
diff --git a/src/rpc.rs b/src/rpc.rs
index 6afc717d28..423f11424b 100644
--- a/src/rpc.rs
+++ b/src/rpc.rs
@@ -220,7 +220,7 @@ impl RpcClient {
         method: &str,
         params: &[JsonValue],
     ) -> Result<T, Error> {
-        let params = Some(params.into());
+        let params = params.into();
         log::debug!("request {}: {:?}", method, params);
         let data = match self {
             Self::WebSocket(inner) => {
@@ -238,7 +238,7 @@ impl RpcClient {
         params: &[JsonValue],
         unsubscribe_method: &str,
     ) -> Result<Subscription<T>, Error> {
-        let params = Some(params.into());
+        let params = params.into();
         match self {
             Self::WebSocket(inner) => {
                 inner