diff --git a/core/src/client/client.rs b/core/src/client/client.rs
index 3117abd55f..ba1538effe 100644
--- a/core/src/client/client.rs
+++ b/core/src/client/client.rs
@@ -811,7 +811,7 @@ impl BlockChainClient for Client {
 impl TermInfo for Client {
     fn last_term_finished_block_num(&self, id: BlockId) -> Option<BlockNumber> {
         self.state_at(id)
-            .map(|state| state.metadata().unwrap().expect("Meatadata always exist"))
+            .map(|state| state.metadata().unwrap().expect("Metadata always exist"))
             .map(|metadata| metadata.last_term_finished_block_num())
     }
 
diff --git a/spec/JSON-RPC.md b/spec/JSON-RPC.md
index 940676b59d..8127e45591 100644
--- a/spec/JSON-RPC.md
+++ b/spec/JSON-RPC.md
@@ -1489,7 +1489,7 @@ It returns null if the block number parameter is larger than the current best bl
 ```
   curl \
     -H 'Content-Type: application/json' \
-    -d '{"jsonrpc": "2.0", "method": "chain_getMeatadataSeq", "params": [53], "id": 7}' \
+    -d '{"jsonrpc": "2.0", "method": "chain_getMetadataSeq", "params": [53], "id": 7}' \
     localhost:8080
 ```