diff --git a/Cargo.toml b/Cargo.toml
index 39484b143c..6b584e23d3 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -28,10 +28,10 @@ frame-system = { git = "https://github.com/paritytech/substrate/", package = "fr
 pallet-balances = { git = "https://github.com/paritytech/substrate/", package = "pallet-balances" }
 pallet-contracts = { git = "https://github.com/paritytech/substrate/", package = "pallet-contracts" }
 pallet-indices = { git = "https://github.com/paritytech/substrate/", package = "pallet-indices" }
-substrate-rpc-api = { git = "https://github.com/paritytech/substrate/", package = "substrate-rpc-api" }
+substrate-rpc-api = { git = "https://github.com/paritytech/substrate/", package = "sc-rpc-api" }
 substrate-rpc-primitives = { git = "https://github.com/paritytech/substrate/", package = "substrate-rpc-primitives" }
 substrate-primitives = { git = "https://github.com/paritytech/substrate/", package = "substrate-primitives" }
-txpool = {  git = "https://github.com/paritytech/substrate/", package = "substrate-transaction-graph" }
+txpool = { git = "https://github.com/paritytech/substrate/", package = "sc-transaction-graph" }
 url = "1.7"
 
 [dev-dependencies]
diff --git a/src/rpc.rs b/src/rpc.rs
index cc7062b437..336f1687e2 100644
--- a/src/rpc.rs
+++ b/src/rpc.rs
@@ -14,18 +14,6 @@
 // You should have received a copy of the GNU General Public License
 // along with substrate-subxt.  If not, see <http://www.gnu.org/licenses/>.
 
-use crate::{
-    error::Error,
-    events::{
-        EventsDecoder,
-        RuntimeEvent,
-    },
-    metadata::Metadata,
-    frame::{
-        balances::Balances,
-        system::System,
-    },
-};
 use futures::future::{
     self,
     Future,
@@ -55,7 +43,27 @@ use substrate_rpc_api::{
     chain::ChainClient,
     state::StateClient,
 };
-use substrate_rpc_primitives::number::NumberOrHex;
+use substrate_rpc_primitives::{
+    list::ListOrValue,
+    number::NumberOrHex,
+};
+
+use crate::{
+    error::Error,
+    events::{
+        EventsDecoder,
+        RawEvent,
+        RuntimeEvent,
+    },
+    frame::{
+        balances::Balances,
+        system::{
+            System,
+            SystemEvent,
+        },
+    },
+    metadata::Metadata,
+};
 
 pub type ChainBlock<T> = SignedBlock<Block<<T as System>::Header, OpaqueExtrinsic>>;
 pub type BlockNumber<T> = NumberOrHex<<T as System>::BlockNumber>;
@@ -102,10 +110,15 @@ impl<T: System> Rpc<T> {
     pub fn genesis_hash(&self) -> impl Future<Item = T::Hash, Error = Error> {
         let block_zero = T::BlockNumber::min_value();
         self.chain
-            .block_hash(Some(NumberOrHex::Number(block_zero)))
+            .block_hash(Some(ListOrValue::Value(NumberOrHex::Number(block_zero))))
             .map_err(Into::into)
-            .and_then(|genesis_hash| {
-                future::result(genesis_hash.ok_or("Genesis hash not found".into()))
+            .and_then(|list_or_value| {
+                future::result(
+                    match list_or_value {
+                        ListOrValue::Value(genesis_hash) => genesis_hash.ok_or_else(|| "Genesis hash not found".into()),
+                        ListOrValue::List(_) => Err("Expected a Value, got a List".into()),
+                    }
+                )
             })
     }
 
@@ -123,9 +136,17 @@ impl<T: System> Rpc<T> {
     /// Get a block hash, returns hash of latest block by default
     pub fn block_hash(
         &self,
-        hash: Option<BlockNumber<T>>,
+        block_number: Option<BlockNumber<T>>,
     ) -> impl Future<Item = Option<T::Hash>, Error = Error> {
-        self.chain.block_hash(hash).map_err(Into::into)
+        self.chain
+            .block_hash(block_number.map(|bn| ListOrValue::Value(bn)))
+            .map_err(Into::into)
+            .and_then(|list_or_value| {
+                match list_or_value {
+                    ListOrValue::Value(hash) => Ok(hash),
+                    ListOrValue::List(_) => Err("Expected a Value, got a List".into()),
+                }
+            })
     }
 
     /// Get a Block
@@ -158,11 +179,6 @@ use substrate_primitives::{
     twox_128,
 };
 use txpool::watcher::Status;
-
-use crate::{
-    events::RawEvent,
-    frame::system::SystemEvent,
-};
 use frame_system::Phase;
 
 type MapClosure<T> = Box<dyn Fn(T) -> T + Send>;