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 983eae3..a5010b7 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
@@ -4,6 +4,7 @@ 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.stereotype.Service;
 import org.springframework.util.LinkedMultiValueMap;
 import org.springframework.util.MultiValueMap;
@@ -241,7 +242,7 @@ public class PrestashopClient {
             MultipartFile imageFile
     ) {
         try {
-            // On construit l'URL complète (absolue)
+            // URL absolue
             StringBuilder urlBuilder = new StringBuilder(baseUrl)
                     .append("/images/products/")
                     .append(productId);
@@ -253,26 +254,34 @@ public class PrestashopClient {
             String url = urlBuilder.toString();
 
             byte[] bytes = imageFile.getBytes();
+            String contentType = imageFile.getContentType();
+            if (contentType == null || contentType.isBlank()) {
+                contentType = MediaType.APPLICATION_OCTET_STREAM_VALUE;
+            }
 
-            log.info("[PrestaShop] POST (image multipart) {} (size={} bytes, contentType={})",
-                    url, bytes.length, imageFile.getContentType());
+            String filename = imageFile.getOriginalFilename();
+            if (filename == null || filename.isBlank()) {
+                filename = "image.jpg";
+            }
 
-            ByteArrayResource fileResource = new ByteArrayResource(bytes) {
-                @Override
-                public String getFilename() {
-                    String name = imageFile.getOriginalFilename();
-                    return (name != null && !name.isBlank()) ? name : "image.jpg";
-                }
-            };
+            log.info(
+                    "[PrestaShop] POST (image multipart) {} (size={} bytes, contentType={})",
+                    url, bytes.length, contentType
+            );
 
-            MultiValueMap<String, Object> body = new LinkedMultiValueMap<>();
-            // *** clé "image" obligatoire pour Presta ***
-            body.add("image", fileResource);
+            // Construction propre du multipart avec un champ `image` fichier
+            MultipartBodyBuilder bodyBuilder = new MultipartBodyBuilder();
+            bodyBuilder
+                    .part("image", bytes)
+                    .filename(filename)
+                    .contentType(MediaType.parseMediaType(contentType));
+
+            MultiValueMap<String, HttpEntity<?>> multipartBody = bodyBuilder.build();
 
             return client.post()
-                    .uri(URI.create(url))                 // <-- URL absolue, plus de scheme undefined
+                    .uri(URI.create(url))
                     .contentType(MediaType.MULTIPART_FORM_DATA)
-                    .body(body)
+                    .body(multipartBody)
                     .retrieve()
                     .toEntity(String.class);