diff --git a/frontend/api_client.py b/frontend/api_client.py
index fdc9070..3587da3 100644
--- a/frontend/api_client.py
+++ b/frontend/api_client.py
@@ -15,6 +15,7 @@ from typing import Optional
 
 BACKEND_URL = os.getenv("BACKEND_URL", "http://10.2.0.2:9000")
 TIMEOUT = 30
+ANALYZE_TIMEOUT = 120  # guestfish needs time to probe large disk images
 
 
 class ApiError(Exception):
@@ -48,7 +49,7 @@ class ApiClient:
             "vmid": vmid,
             "source_filename": filename,
             "source_type": source_type,
-        })
+        }, timeout=ANALYZE_TIMEOUT)
 
     def create_job(self, payload: dict) -> dict:
         """POST /api/v1/jobs — submit conversion job."""
@@ -66,16 +67,16 @@ class ApiClient:
     # Internal
     # ------------------------------------------------------------------
 
-    def _get(self, path: str) -> dict:
-        return self._request("GET", path)
+    def _get(self, path: str, timeout: int = TIMEOUT) -> dict:
+        return self._request("GET", path, timeout=timeout)
 
-    def _post(self, path: str, data: dict) -> dict:
-        return self._request("POST", path, data)
+    def _post(self, path: str, data: dict, timeout: int = TIMEOUT) -> dict:
+        return self._request("POST", path, data, timeout=timeout)
 
-    def _request(self, method: str, path: str, data: Optional[dict] = None) -> dict:
+    def _request(self, method: str, path: str, data: Optional[dict] = None, timeout: int = TIMEOUT) -> dict:
         url = urljoin(self.base_url + "/", path.lstrip("/"))
         try:
-            resp = self._s.request(method, url, json=data, timeout=TIMEOUT)
+            resp = self._s.request(method, url, json=data, timeout=timeout)
             if resp.ok:
                 return resp.json()
             detail = resp.text