diff --git a/api/openapi.json b/api/openapi.json
index 3b038e01..e3edc0d2 100644
--- a/api/openapi.json
+++ b/api/openapi.json
@@ -6133,7 +6133,13 @@
         "jetton": {
          "$ref": "#/components/schemas/JettonPreview"
         },
+        "qty": {
+         "example": "200",
+         "type": "string",
+         "x-js-format": "bigint"
+        },
         "quantity": {
+         "deprecated": true,
          "example": 10,
          "format": "int64",
          "type": "integer",
@@ -6142,6 +6148,7 @@
        },
        "required": [
         "account",
+        "qty",
         "quantity",
         "jetton"
        ],
diff --git a/api/openapi.yml b/api/openapi.yml
index 691ee11c..053d5ea3 100644
--- a/api/openapi.yml
+++ b/api/openapi.yml
@@ -5754,6 +5754,7 @@ components:
             type: object
             required:
               - account
+              - qty
               - quantity
               - jetton
             properties:
@@ -5761,8 +5762,13 @@ components:
                 $ref: '#/components/schemas/AccountAddress'
               jetton:
                 $ref: '#/components/schemas/JettonPreview'
+              qty:
+                type: string
+                x-js-format: bigint
+                example: "200"
               quantity:
                 type: integer
+                deprecated: true
                 format: int64
                 x-js-format: bigint
                 example: 10
diff --git a/pkg/api/event_converters.go b/pkg/api/event_converters.go
index 2b6f47eb..1bbfb508 100644
--- a/pkg/api/event_converters.go
+++ b/pkg/api/event_converters.go
@@ -782,6 +782,7 @@ func convertAccountValueFlow(accountID tongo.AccountID, flow *bath.AccountValueF
 			Account:  convertAccountAddress(jettonMaster, book),
 			Jetton:   previews[jettonMaster],
 			Quantity: quantity.Int64(),
+			Qty:      quantity.String(),
 		})
 	}
 	return valueFlow
diff --git a/pkg/oas/oas_json_gen.go b/pkg/oas/oas_json_gen.go
index a8d4a86e..e6c33009 100644
--- a/pkg/oas/oas_json_gen.go
+++ b/pkg/oas/oas_json_gen.go
@@ -40180,16 +40180,21 @@ func (s *ValueFlowJettonsItem) encodeFields(e *jx.Encoder) {
 		e.FieldStart("jetton")
 		s.Jetton.Encode(e)
 	}
+	{
+		e.FieldStart("qty")
+		e.Str(s.Qty)
+	}
 	{
 		e.FieldStart("quantity")
 		e.Int64(s.Quantity)
 	}
 }
 
-var jsonFieldsNameOfValueFlowJettonsItem = [3]string{
+var jsonFieldsNameOfValueFlowJettonsItem = [4]string{
 	0: "account",
 	1: "jetton",
-	2: "quantity",
+	2: "qty",
+	3: "quantity",
 }
 
 // Decode decodes ValueFlowJettonsItem from json.
@@ -40221,8 +40226,20 @@ func (s *ValueFlowJettonsItem) Decode(d *jx.Decoder) error {
 			}(); err != nil {
 				return errors.Wrap(err, "decode field \"jetton\"")
 			}
-		case "quantity":
+		case "qty":
 			requiredBitSet[0] |= 1 << 2
+			if err := func() error {
+				v, err := d.Str()
+				s.Qty = string(v)
+				if err != nil {
+					return err
+				}
+				return nil
+			}(); err != nil {
+				return errors.Wrap(err, "decode field \"qty\"")
+			}
+		case "quantity":
+			requiredBitSet[0] |= 1 << 3
 			if err := func() error {
 				v, err := d.Int64()
 				s.Quantity = int64(v)
@@ -40243,7 +40260,7 @@ func (s *ValueFlowJettonsItem) Decode(d *jx.Decoder) error {
 	// Validate required fields.
 	var failures []validate.FieldError
 	for i, mask := range [1]uint8{
-		0b00000111,
+		0b00001111,
 	} {
 		if result := (requiredBitSet[i] & mask) ^ mask; result != 0 {
 			// Mask only required fields and check equality to mask using XOR.
diff --git a/pkg/oas/oas_schemas_gen.go b/pkg/oas/oas_schemas_gen.go
index be542dba..c04c5d97 100644
--- a/pkg/oas/oas_schemas_gen.go
+++ b/pkg/oas/oas_schemas_gen.go
@@ -17270,9 +17270,11 @@ func (s *ValueFlow) SetJettons(val []ValueFlowJettonsItem) {
 }
 
 type ValueFlowJettonsItem struct {
-	Account  AccountAddress `json:"account"`
-	Jetton   JettonPreview  `json:"jetton"`
-	Quantity int64          `json:"quantity"`
+	Account AccountAddress `json:"account"`
+	Jetton  JettonPreview  `json:"jetton"`
+	Qty     string         `json:"qty"`
+	// Deprecated: schema marks this property as deprecated.
+	Quantity int64 `json:"quantity"`
 }
 
 // GetAccount returns the value of Account.
@@ -17285,6 +17287,11 @@ func (s *ValueFlowJettonsItem) GetJetton() JettonPreview {
 	return s.Jetton
 }
 
+// GetQty returns the value of Qty.
+func (s *ValueFlowJettonsItem) GetQty() string {
+	return s.Qty
+}
+
 // GetQuantity returns the value of Quantity.
 func (s *ValueFlowJettonsItem) GetQuantity() int64 {
 	return s.Quantity
@@ -17300,6 +17307,11 @@ func (s *ValueFlowJettonsItem) SetJetton(val JettonPreview) {
 	s.Jetton = val
 }
 
+// SetQty sets the value of Qty.
+func (s *ValueFlowJettonsItem) SetQty(val string) {
+	s.Qty = val
+}
+
 // SetQuantity sets the value of Quantity.
 func (s *ValueFlowJettonsItem) SetQuantity(val int64) {
 	s.Quantity = val