diff --git a/install.sh b/install.sh
index d0566a4..892a4a9 100755
--- a/install.sh
+++ b/install.sh
@@ -142,6 +142,7 @@ else
     echo "  -> Clonage du dépôt public officiel depuis https://git.sorcier-research.com..."
     rm -rf "$TARGET_DIR"
     git clone https://git.sorcier-research.com/sorcier/NexusPBX.git "$TARGET_DIR"
+    git config --system --add safe.directory "$TARGET_DIR" 2>/dev/null || true
     cd "$TARGET_DIR"
 fi
 
diff --git a/public/api.php b/public/api.php
index d8559d3..c8792da 100644
--- a/public/api.php
+++ b/public/api.php
@@ -2242,15 +2242,35 @@ try {
             $remoteChangelog = [];
             $remoteDate = '';
 
-            exec("git --git-dir={$appDir}/.git fetch origin main --quiet 2>/dev/null", $output, $code);
-            $remoteJsonRaw = shell_exec("git --git-dir={$appDir}/.git show origin/main:version.json 2>/dev/null");
-            if ($remoteJsonRaw) {
-                $remoteData = json_decode($remoteJsonRaw, true);
+            // 1. Interrogation directe via HTTP Raw (indépendant de .git et ultra-rapide)
+            $rawHttp = @shell_exec("curl -k -s --connect-timeout 4 \"https://git.sorcier-research.com/sorcier/NexusPBX/raw/branch/main/version.json\" 2>/dev/null");
+            if (empty($rawHttp)) {
+                $ctx = stream_context_create([
+                    'http' => ['timeout' => 4],
+                    'ssl'  => ['verify_peer' => false, 'verify_peer_name' => false]
+                ]);
+                $rawHttp = @file_get_contents("https://git.sorcier-research.com/sorcier/NexusPBX/raw/branch/main/version.json", false, $ctx);
+            }
+
+            if (!empty($rawHttp)) {
+                $remoteData = json_decode((string)$rawHttp, true);
                 if (is_array($remoteData) && !empty($remoteData['version'])) {
                     $remoteVer = (string)$remoteData['version'];
                     $remoteChangelog = $remoteData['changelog'] ?? [];
                     $remoteDate = $remoteData['release_date'] ?? '';
                 }
+            } else {
+                // 2. Fallback local Git si indisponibilité du serveur HTTP
+                exec("git --git-dir={$appDir}/.git fetch origin main --quiet 2>/dev/null", $output, $code);
+                $remoteJsonRaw = shell_exec("git --git-dir={$appDir}/.git show origin/main:version.json 2>/dev/null");
+                if ($remoteJsonRaw) {
+                    $remoteData = json_decode($remoteJsonRaw, true);
+                    if (is_array($remoteData) && !empty($remoteData['version'])) {
+                        $remoteVer = (string)$remoteData['version'];
+                        $remoteChangelog = $remoteData['changelog'] ?? [];
+                        $remoteDate = $remoteData['release_date'] ?? '';
+                    }
+                }
             }
 
             $hasUpdate = version_compare($remoteVer, $currentVer, '>');
diff --git a/public/assets/app.js b/public/assets/app.js
index 5b3ecbe..1e5a900 100644
--- a/public/assets/app.js
+++ b/public/assets/app.js
@@ -5745,11 +5745,17 @@ async function checkSystemUpdate(notify = false) {
                 return;
             } catch (_) {}
         }
+    } else {
+        localStorage.removeItem(STORAGE_KEY_TIME);
+        localStorage.removeItem(STORAGE_KEY_DATA);
     }
 
+    let origBtnHtml = null;
     if (btnCheck) {
         btnCheck.disabled = true;
         btnCheck.classList.add('opacity-50');
+        origBtnHtml = btnCheck.innerHTML;
+        btnCheck.innerHTML = `<svg class="animate-spin w-4 h-4 text-cyan-400" fill="none" viewBox="0 0 24 24"><circle class="opacity-25" cx="12" cy="12" r="10" stroke="currentColor" stroke-width="4"></circle><path class="opacity-75" fill="currentColor" d="M4 12a8 8 0 018-8v8H4z"></path></svg><span>Vérification en cours...</span>`;
     }
 
     try {
@@ -5777,6 +5783,7 @@ async function checkSystemUpdate(notify = false) {
         if (btnCheck) {
             btnCheck.disabled = false;
             btnCheck.classList.remove('opacity-50');
+            if (origBtnHtml) btnCheck.innerHTML = origBtnHtml;
         }
     }
 
diff --git a/scripts/update.sh b/scripts/update.sh
index dae9280..1fbccf6 100755
--- a/scripts/update.sh
+++ b/scripts/update.sh
@@ -37,6 +37,7 @@ for arg in "$@"; do
 done
 
 cd "$APP_DIR" || exit 1
+git config --system --add safe.directory "$APP_DIR" 2>/dev/null || true
 git config --global --add safe.directory "$APP_DIR" 2>/dev/null || true
 
 # Lecture de la version locale
diff --git a/version.json b/version.json
index 654ed30..ce22452 100644
--- a/version.json
+++ b/version.json
@@ -1,12 +1,12 @@
 {
-  "version": "1.3.6",
+  "version": "1.3.7",
   "codename": "Helios",
   "release_date": "2026-11-04",
   "min_php_version": "8.2",
   "changelog": [
+    "Vérification ultra-rapide des mises à jour en direct via cURL CLI et flux HTTP sans dépendre de git ou de php-curl",
+    "Bouton 'Vérifier les mises à jour' forçant le rafraîchissement immédiat du cache navigateur (bypass 24h)",
     "Nouvelle modale de confirmation de restauration système alignée sur le thème sombre NexusPBX",
-    "Remplacement des popups d'alerte natives du navigateur lors des restaurations locales et téléversées",
-    "Affichage détaillé des éléments restaurés (base SQLite, sons, messageries vocales, rechargement Asterisk)",
-    "Désactivation du bac à sable ProtectSystem=full sur PHP-FPM pour fiabiliser les mises à jour"
+    "Remplacement des popups d'alerte natives du navigateur lors des restaurations locales et téléversées"
   ]
 }