diff --git a/docs/rpc.md b/docs/rpc.md
index 5bf369f21..e8f5baff9 100644
--- a/docs/rpc.md
+++ b/docs/rpc.md
@@ -151,38 +151,37 @@ Reply:
    "result" : [
       {
          "txid" : "0x1cb7e089bb52cabb35c480de9d99c41c6fea7f5a276b41d71ab3fc7c470dcb74",
+         "net_fee" : "0",
          "events" : [
             {
-               "type" : "send",
                "asset" : "3a4acd3647086e7c44398aac0349802e6a171129",
-               "value" : "20000000000",
-               "address" : "ALuZLuuDssJqG2E4foANKwbLamYHuffFjg"
+               "type" : "send",
+               "address" : "ALuZLuuDssJqG2E4foANKwbLamYHuffFjg",
+               "value" : "20000000000"
             }
          ],
-         "net_fee" : 0,
-         "block_index" : 6163114,
+         "sys_fee" : "0",
          "timestamp" : 1600094117,
-         "sys_fee" : 0
+         "block_index" : 6163114
       },
       {
          "block_index" : 6162995,
-         "net_fee" : 0,
          "timestamp" : 1600092165,
+         "sys_fee" : "0",
          "events" : [
             {
+               "asset" : "3a4acd3647086e7c44398aac0349802e6a171129",
                "address" : "ALuZLuuDssJqG2E4foANKwbLamYHuffFjg",
-               "value" : "20000000000",
                "type" : "receive",
-               "asset" : "3a4acd3647086e7c44398aac0349802e6a171129"
+               "value" : "20000000000"
             }
          ],
-         "txid" : "0xc8b45480ade5395a4a239bb44eea6d86113f32090c4854b0c4aeee1b9485edab",
-         "sys_fee" : 0
+         "net_fee" : "0",
+         "txid" : "0xc8b45480ade5395a4a239bb44eea6d86113f32090c4854b0c4aeee1b9485edab"
       }
    ],
    "id" : 5
 }
-
 ```
 
 Another request:
@@ -196,18 +195,10 @@ Reply:
 
 ```json
 {
+   "jsonrpc" : "2.0",
+   "id" : 5,
    "result" : [
       {
-         "timestamp" : 1561566911,
-         "net_fee" : 1,
-         "events" : [
-            {
-               "address" : "AZCcft1uYtmZXxzHPr5tY7L6M85zG7Dsrv",
-               "asset" : "1578103c13e39df15d0d29826d957e85d770d8c9",
-               "type" : "receive",
-               "value" : "2380844141430"
-            }
-         ],
          "elements" : [
             {
                "asset" : "602c79718b16e442de58778e148d0b1084e3b2dffd5de6b7b16cee7969282de7",
@@ -216,48 +207,56 @@ Reply:
                "type" : "input"
             },
             {
-               "address" : "AZCcft1uYtmZXxzHPr5tY7L6M85zG7Dsrv",
-               "asset" : "602c79718b16e442de58778e148d0b1084e3b2dffd5de6b7b16cee7969282de7",
+               "value" : "0.0000083",
                "type" : "output",
-               "value" : "0.0000083"
-            }
-         ],
-         "sys_fee" : 0,
-         "txid" : "0xb4f1bdb466d8bd3524502008a0bc1f9342356b4eea67be19d384845c670442a6",
-         "block_index" : 3929554
-      },
-      {
-         "elements" : [
-            {
-               "value" : "0.00000838",
-               "type" : "input",
                "asset" : "602c79718b16e442de58778e148d0b1084e3b2dffd5de6b7b16cee7969282de7",
                "address" : "AZCcft1uYtmZXxzHPr5tY7L6M85zG7Dsrv"
-            },
-            {
-               "asset" : "602c79718b16e442de58778e148d0b1084e3b2dffd5de6b7b16cee7969282de7",
-               "address" : "AZCcft1uYtmZXxzHPr5tY7L6M85zG7Dsrv",
-               "value" : "0.00000837",
-               "type" : "output"
             }
          ],
          "events" : [
             {
                "asset" : "1578103c13e39df15d0d29826d957e85d770d8c9",
                "address" : "AZCcft1uYtmZXxzHPr5tY7L6M85zG7Dsrv",
-               "value" : "2100000000",
-               "type" : "receive"
+               "type" : "receive",
+               "value" : "2380844141430"
             }
          ],
-         "timestamp" : 1561566300,
-         "net_fee" : 1,
+         "timestamp" : 1561566911,
+         "net_fee" : "0.00000001",
+         "block_index" : 3929554,
+         "sys_fee" : "0",
+         "txid" : "0xb4f1bdb466d8bd3524502008a0bc1f9342356b4eea67be19d384845c670442a6"
+      },
+      {
+         "txid" : "0xc045c0612b34218b7e5eaee973114af3eff925f859adf23cf953930f667cdc93",
+         "sys_fee" : "0",
          "block_index" : 3929523,
-         "sys_fee" : 0,
-         "txid" : "0xc045c0612b34218b7e5eaee973114af3eff925f859adf23cf953930f667cdc93"
+         "net_fee" : "0.00000001",
+         "timestamp" : 1561566300,
+         "events" : [
+            {
+               "asset" : "1578103c13e39df15d0d29826d957e85d770d8c9",
+               "address" : "AZCcft1uYtmZXxzHPr5tY7L6M85zG7Dsrv",
+               "type" : "receive",
+               "value" : "2100000000"
+            }
+         ],
+         "elements" : [
+            {
+               "asset" : "602c79718b16e442de58778e148d0b1084e3b2dffd5de6b7b16cee7969282de7",
+               "address" : "AZCcft1uYtmZXxzHPr5tY7L6M85zG7Dsrv",
+               "type" : "input",
+               "value" : "0.00000838"
+            },
+            {
+               "value" : "0.00000837",
+               "type" : "output",
+               "address" : "AZCcft1uYtmZXxzHPr5tY7L6M85zG7Dsrv",
+               "asset" : "602c79718b16e442de58778e148d0b1084e3b2dffd5de6b7b16cee7969282de7"
+            }
+         ]
       }
-   ],
-   "id" : 5,
-   "jsonrpc" : "2.0"
+   ]
 }
 ```
 
diff --git a/pkg/rpc/response/result/nep5.go b/pkg/rpc/response/result/nep5.go
index 7b3a2a773..139f4f22a 100644
--- a/pkg/rpc/response/result/nep5.go
+++ b/pkg/rpc/response/result/nep5.go
@@ -76,8 +76,8 @@ type TransferTx struct {
 	TxID       util.Uint256      `json:"txid"`
 	Timestamp  uint32            `json:"timestamp"`
 	Index      uint32            `json:"block_index"`
-	SystemFee  int64             `json:"sys_fee"`
-	NetworkFee int64             `json:"net_fee"`
+	SystemFee  string            `json:"sys_fee"`
+	NetworkFee string            `json:"net_fee"`
 	Elements   []TransferTxEvent `json:"elements,omitempty"`
 	Events     []TransferTxEvent `json:"events,omitempty"`
 }
diff --git a/pkg/rpc/server/server.go b/pkg/rpc/server/server.go
index e8afaef9f..9019e90dd 100644
--- a/pkg/rpc/server/server.go
+++ b/pkg/rpc/server/server.go
@@ -935,8 +935,8 @@ func (s *Server) getAllTransferTx(ps request.Params) (interface{}, *response.Err
 				respErr = response.NewInternalServerError("invalid NEP5 transfer log", err)
 				break
 			}
-			transfer.NetworkFee = int64(s.chain.NetworkFee(tx))
-			transfer.SystemFee = int64(s.chain.SystemFee(tx))
+			transfer.NetworkFee = s.chain.NetworkFee(tx).String()
+			transfer.SystemFee = s.chain.SystemFee(tx).String()
 
 			inouts, err := s.chain.References(tx)
 			if err != nil {
diff --git a/pkg/rpc/server/server_test.go b/pkg/rpc/server/server_test.go
index e1673ab42..1168ecd22 100644
--- a/pkg/rpc/server/server_test.go
+++ b/pkg/rpc/server/server_test.go
@@ -1257,8 +1257,8 @@ func testRPCProtocol(t *testing.T, doRPCCall func(string, string, *testing.T) []
 				tx, h, err := e.chain.GetTransaction(id)
 				require.NoError(t, err)
 				require.Equal(t, h, ttx.Index)
-				require.Equal(t, int64(e.chain.SystemFee(tx)), ttx.SystemFee)
-				require.Equal(t, int64(e.chain.NetworkFee(tx)), ttx.NetworkFee)
+				require.Equal(t, e.chain.SystemFee(tx).String(), ttx.SystemFee)
+				require.Equal(t, e.chain.NetworkFee(tx).String(), ttx.NetworkFee)
 				require.Equal(t, len(tx.Inputs)+len(tx.Outputs), len(ttx.Elements))
 			}
 		}