diff --git a/ethereumetl/mappers/block_mapper.py b/ethereumetl/mappers/block_mapper.py
index d5ae556f5..5b3dfaf79 100644
--- a/ethereumetl/mappers/block_mapper.py
+++ b/ethereumetl/mappers/block_mapper.py
@@ -38,7 +38,7 @@ def json_dict_to_block(self, json_dict):
block.number = hex_to_dec(json_dict.get('number'))
block.hash = json_dict.get('hash')
block.parent_hash = json_dict.get('parentHash')
- block.nonce = json_dict.get('nonce')
+ block.nonce = hex_to_dec(json_dict.get('nonce'))
block.sha3_uncles = json_dict.get('sha3Uncles')
block.logs_bloom = json_dict.get('logsBloom')
block.transactions_root = json_dict.get('transactionsRoot')