diff --git a/integrations/tendermint/src/runtime.ts b/integrations/tendermint/src/runtime.ts
index 1248908f..4b43bc55 100644
--- a/integrations/tendermint/src/runtime.ts
+++ b/integrations/tendermint/src/runtime.ts
@@ -23,7 +23,7 @@ interface IAttribute {
 
 interface IEvent {
   type: string;
-  attributes: IAttribute[];
+  attributes?: IAttribute[];
 }
 
 export default class Tendermint implements IRuntime {
@@ -174,7 +174,7 @@ export default class Tendermint implements IRuntime {
     if (item.value.block_results.begin_block_events) {
       item.value.block_results.begin_block_events =
         item.value.block_results.begin_block_events.map((event: IEvent) => {
-          event.attributes = event.attributes
+          event.attributes = (event.attributes || [])
             .sort(compareEventAttribute)
             .map(({ index, ...attribute }: IAttribute) => attribute);
           return event;
@@ -185,7 +185,7 @@ export default class Tendermint implements IRuntime {
     if (item.value.block_results.end_block_events) {
       item.value.block_results.end_block_events =
         item.value.block_results.end_block_events.map((event: IEvent) => {
-          event.attributes = event.attributes
+          event.attributes = (event.attributes || [])
             .sort(compareEventAttribute)
             .map(({ index, ...attribute }: IAttribute) => attribute);
           return event;
@@ -201,7 +201,7 @@ export default class Tendermint implements IRuntime {
           if (tx_result.events) {
             tx_result.events = tx_result.events.map((event: IEvent) => {
               // sort attributes in txs_results
-              event.attributes = event.attributes
+              event.attributes = (event.attributes || [])
                 .sort(compareEventAttribute)
                 .map(({ index, ...attribute }: IAttribute) => attribute);
 
diff --git a/integrations/tendermint/src/schemas/block_result.json b/integrations/tendermint/src/schemas/block_result.json
index 1d39fa48..237bc1cd 100644
--- a/integrations/tendermint/src/schemas/block_result.json
+++ b/integrations/tendermint/src/schemas/block_result.json
@@ -58,7 +58,7 @@
                       ]
                     }
                   },
-                  "required": ["type", "attributes"]
+                  "required": ["type"]
                 }
               ]
             },
@@ -109,7 +109,7 @@
               ]
             }
           },
-          "required": ["type", "attributes"]
+          "required": ["type"]
         }
       ]
     },
@@ -143,7 +143,7 @@
               ]
             }
           },
-          "required": ["type", "attributes"]
+          "required": ["type"]
         }
       ]
     },