diff --git a/Cargo.toml b/Cargo.toml
index 6e8cd769..a61b7992 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -14,7 +14,6 @@ prometheus = ["prometheus/push", "prometheus/process"]
 # Enable integration tests with a running TiKV and PD instance.
 # Use $PD_ADDRS, comma separated, to set the addresses the tests use.
 integration-tests = []
-protobuf-codec = []
 
 [lib]
 name = "tikv_client"
diff --git a/src/raw/client.rs b/src/raw/client.rs
index e5a996ab..a324b68b 100644
--- a/src/raw/client.rs
+++ b/src/raw/client.rs
@@ -759,7 +759,7 @@ impl<PdC: PdClient> Client<PdC> {
             });
         }
         let backoff = DEFAULT_STORE_BACKOFF;
-        let range = range.into().encode_keyspace(self.keyspace, KeyMode::Raw);
+        let mut range = range.into().encode_keyspace(self.keyspace, KeyMode::Raw);
         let mut result = Vec::new();
         let mut current_limit = limit;
         let (start_key, end_key) = range.clone().into_keys();
@@ -788,6 +788,7 @@ impl<PdC: PdClient> Client<PdC> {
                 break;
             } else {
                 current_key = next_key;
+                range = BoundRange::new(std::ops::Bound::Included(current_key.clone()), range.to);
             }
         }
 
@@ -805,7 +806,6 @@ impl<PdC: PdClient> Client<PdC> {
         mut scan_args: ScanInnerArgs,
     ) -> Result<(Option<RawScanResponse>, Key)> {
         let start_key = scan_args.start_key;
-
         loop {
             let region = self.rpc.clone().region_for_key(&start_key).await?;
             let store = self.rpc.clone().store_for_id(region.id()).await?;