diff --git a/internal/cli/server/api_service.go b/internal/cli/server/api_service.go
index 78ddade84d..2861cf3a9d 100644
--- a/internal/cli/server/api_service.go
+++ b/internal/cli/server/api_service.go
@@ -118,6 +118,9 @@ func getRpcBlockNumberFromString(blockNumber string) (rpc.BlockNumber, error) {
 		if err != nil {
 			return rpc.BlockNumber(0), errors.New("invalid block number")
 		}
+		if blckNum > uint64(^uint32(0)) {
+			return rpc.BlockNumber(0), errors.New("block number out of range")
+		}
 		return rpc.BlockNumber(blckNum), nil
 	}
 }