diff --git a/src/food-market.infrastructure/Integrations/MoySklad/MoySkladClient.cs b/src/food-market.infrastructure/Integrations/MoySklad/MoySkladClient.cs
index 63cc056..a4ece45 100644
--- a/src/food-market.infrastructure/Integrations/MoySklad/MoySkladClient.cs
+++ b/src/food-market.infrastructure/Integrations/MoySklad/MoySkladClient.cs
@@ -33,10 +33,10 @@ private HttpRequestMessage Build(HttpMethod method, string pathAndQuery, string
     {
         var req = new HttpRequestMessage(method, pathAndQuery);
         req.Headers.Authorization = new AuthenticationHeaderValue("Bearer", token);
-        // MoySklad requires this exact Accept value (error code 1062 otherwise).
-        var accept = new MediaTypeWithQualityHeaderValue("application/json");
-        accept.Parameters.Add(new System.Net.Http.Headers.NameValueHeaderValue("charset", "utf-8"));
-        req.Headers.Accept.Add(accept);
+        // MoySklad requires the exact literal "application/json;charset=utf-8" (no space
+        // after ';'). The typed MediaTypeWithQualityHeaderValue API normalizes to
+        // "application/json; charset=utf-8" which MoySklad rejects with code 1062.
+        req.Headers.TryAddWithoutValidation("Accept", "application/json;charset=utf-8");
         req.Headers.AcceptEncoding.Add(new StringWithQualityHeaderValue("gzip"));
         return req;
     }