diff --git a/Post/post_contract.go b/Post/post_contract.go
index ebf1878..ca709fb 100755
--- a/Post/post_contract.go
+++ b/Post/post_contract.go
@@ -1,8 +1,6 @@
 package Post
 
 import (
-	"strconv"
-
 	"github.com/nspcc-dev/neo-go/pkg/interop/native/oracle"
 	"github.com/nspcc-dev/neo-go/pkg/interop/native/std"
 	"github.com/nspcc-dev/neo-go/pkg/interop/runtime"
@@ -56,7 +54,7 @@ func CbGetUUID(url string, postData any, code int, result []byte) {
 		panic("not called from the oracle contract")
 	}
 	if code != oracle.Success {
-		panic("request failed for " + url + " with code " + std.Itoa(code, 10))
+		panic("request failed for " + url + " with code " + std.Itoa10(code))
 	}
 	runtime.Log("result for " + url + " is: " + string(result))
 
@@ -94,7 +92,7 @@ func GetAllPostsByUser(userId string) []Post {
 	i := 0
 	n := getPostIndex(userId)
 	for i < n {
-		post := storage.Get(ctx, userId+strconv.Itoa(i))
+		post := storage.Get(ctx, userId+std.Itoa10(i))
 		i++
 		postsByUser = append(postsByUser, std.Deserialize(post.([]byte)).(Post))
 	}