diff --git a/clients/ethereumjs/mapper.jq b/clients/ethereumjs/mapper.jq
index 7ff336075c..f948041907 100644
--- a/clients/ethereumjs/mapper.jq
+++ b/clients/ethereumjs/mapper.jq
@@ -56,5 +56,6 @@ def to_bool:
     "mergeForkBlock": env.HIVE_MERGE_BLOCK_ID|to_int,
     "terminalTotalDifficulty": env.HIVE_TERMINAL_TOTAL_DIFFICULTY|to_int,
     "shanghaiTime": env.HIVE_SHANGHAI_TIMESTAMP|to_int,
+    "cancunTime": env.HIVE_CANCUN_TIMESTAMP|to_int,
   }|remove_empty
 }