diff --git a/api/src/main/java/fr/gameovergne/api/service/prestashop/PrestashopClient.java b/api/src/main/java/fr/gameovergne/api/service/prestashop/PrestashopClient.java
index 32fec53..a06fe03 100644
--- a/api/src/main/java/fr/gameovergne/api/service/prestashop/PrestashopClient.java
+++ b/api/src/main/java/fr/gameovergne/api/service/prestashop/PrestashopClient.java
@@ -2,21 +2,22 @@ package fr.gameovergne.api.service.prestashop;
 
 import lombok.extern.slf4j.Slf4j;
 import org.springframework.beans.factory.annotation.Value;
-import org.springframework.core.io.ByteArrayResource;
-import org.springframework.http.*;
-import org.springframework.http.client.MultipartBodyBuilder;
+import org.springframework.http.HttpHeaders;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.MediaType;
+import org.springframework.http.ResponseEntity;
 import org.springframework.stereotype.Service;
-import org.springframework.util.LinkedMultiValueMap;
 import org.springframework.util.MultiValueMap;
-import org.springframework.web.client.HttpClientErrorException;
 import org.springframework.web.client.RestClient;
 import org.springframework.web.client.RestClientException;
 import org.springframework.web.client.RestClientResponseException;
 import org.springframework.web.multipart.MultipartFile;
 import org.springframework.web.util.UriComponentsBuilder;
 
-import java.io.IOException;
+import java.io.*;
+import java.net.HttpURLConnection;
 import java.net.URI;
+import java.net.URL;
 import java.nio.charset.StandardCharsets;
 import java.util.Base64;
 
@@ -232,8 +233,6 @@ public class PrestashopClient {
     /**
      * Upload d'une image produit vers PrestaShop :
      * POST /api/images/products/{productId}
-     * <p>
-     * On envoie directement les bytes du fichier avec le bon content-type (image/jpeg, image/png, ...).
      */
 
     public ResponseEntity<String> uploadProductImage(
@@ -242,7 +241,7 @@ public class PrestashopClient {
             MultipartFile imageFile
     ) {
         try {
-            // Construire l’URL Presta
+            // Construire l’URL Presta (comme avant)
             StringBuilder urlBuilder = new StringBuilder(baseUrl)
                     .append("/images/products/")
                     .append(productId);
@@ -252,7 +251,7 @@ public class PrestashopClient {
             }
             String url = urlBuilder.toString();
 
-            byte[] bytes = imageFile.getBytes();
+            byte[] fileBytes = imageFile.getBytes();
 
             String originalFilename = imageFile.getOriginalFilename();
             if (originalFilename == null || originalFilename.isBlank()) {
@@ -261,42 +260,86 @@ public class PrestashopClient {
 
             String contentType = imageFile.getContentType();
             if (contentType == null || contentType.isBlank()) {
-                contentType = MediaType.APPLICATION_OCTET_STREAM_VALUE;
+                contentType = "application/octet-stream";
             }
 
             log.info(
-                    "[PrestaShop] POST (image multipart) {} (size={} bytes, contentType={}, filename={})",
-                    url, bytes.length, contentType, originalFilename
+                    "[PrestaShop] POST (image multipart - manual) {} (size={} bytes, contentType={}, filename={})",
+                    url, fileBytes.length, contentType, originalFilename
             );
 
-            // Resource avec filename pour que PHP le traite comme un fichier dans $_FILES["image"]
-            String finalOriginalFilename = originalFilename;
-            ByteArrayResource imageResource = new ByteArrayResource(bytes) {
-                @Override
-                public String getFilename() {
-                    return finalOriginalFilename;
+            // -------- Construction du multipart "à la main" --------
+            String boundary = "----PrestashopBoundary" + System.currentTimeMillis();
+            ByteArrayOutputStream baos = new ByteArrayOutputStream();
+            OutputStreamWriter osw = new OutputStreamWriter(baos, StandardCharsets.UTF_8);
+            PrintWriter writer = new PrintWriter(osw, true);
+
+            // Début de la part "image"
+            writer.append("--").append(boundary).append("\r\n");
+            writer.append("Content-Disposition: form-data; name=\"image\"; filename=\"")
+                    .append(originalFilename)
+                    .append("\"\r\n");
+            writer.append("Content-Type: ").append(contentType).append("\r\n");
+            writer.append("\r\n");
+            writer.flush();
+
+            // Données binaires du fichier
+            baos.write(fileBytes);
+            baos.write("\r\n".getBytes(StandardCharsets.UTF_8));
+
+            // Fin du multipart
+            writer.append("--").append(boundary).append("--").append("\r\n");
+            writer.flush();
+
+            byte[] multipartBytes = baos.toByteArray();
+
+            // -------- Envoi via HttpURLConnection --------
+            URL targetUrl = URI.create(url).toURL();
+            HttpURLConnection conn = (HttpURLConnection) targetUrl.openConnection();
+            conn.setDoOutput(true);
+            conn.setRequestMethod("POST");
+            conn.setRequestProperty("Content-Type", "multipart/form-data; boundary=" + boundary);
+            conn.setRequestProperty("Accept", "application/xml, text/xml, */*;q=0.1");
+
+            // Important : pas de chunked, on envoie une taille fixe
+            conn.setFixedLengthStreamingMode(multipartBytes.length);
+
+            try (OutputStream os = conn.getOutputStream()) {
+                os.write(multipartBytes);
+            }
+
+            int status = conn.getResponseCode();
+
+            InputStream is = (status >= 200 && status < 300)
+                    ? conn.getInputStream()
+                    : conn.getErrorStream();
+
+            String responseBody;
+            if (is != null) {
+                try (BufferedReader reader = new BufferedReader(new InputStreamReader(is, StandardCharsets.UTF_8))) {
+                    StringBuilder sb = new StringBuilder();
+                    String line;
+                    while ((line = reader.readLine()) != null) {
+                        sb.append(line).append("\n");
+                    }
+                    responseBody = sb.toString();
                 }
+            } else {
+                responseBody = "";
+            }
 
-                @Override
-                public long contentLength() {
-                    return bytes.length;
-                }
-            };
+            log.info("[PrestaShop] Image upload response status={}, body={}", status, responseBody);
 
-            // body multipart : la clé "image" => part nommée "image"
-            MultiValueMap<String, Object> body = new LinkedMultiValueMap<>();
-            body.add("image", imageResource);
+            HttpStatus springStatus = HttpStatus.resolve(status);
+            if (springStatus == null) {
+                springStatus = HttpStatus.INTERNAL_SERVER_ERROR;
+            }
 
-            return client.post()
-                    .uri(URI.create(url))
-                    .contentType(MediaType.MULTIPART_FORM_DATA)
-                    .body(body)
-                    .retrieve()
-                    .toEntity(String.class);
+            return new ResponseEntity<>(responseBody, springStatus);
 
         } catch (IOException e) {
-            log.error("[PrestaShop] Erreur lecture fichier image", e);
-            throw new RuntimeException("Erreur lors de la lecture du fichier image", e);
+            log.error("[PrestaShop] Erreur lors de l'upload d'image", e);
+            throw new RuntimeException("Erreur lors de l'upload d'image vers PrestaShop", e);
         }
     }
 }
\ No newline at end of file