diff --git a/pyproject.toml b/pyproject.toml
index ae40ebc..6ded982 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -8,7 +8,7 @@ version = "0.1.3"
 description = "TLS-fingerprinting backends (curl_cffi / noble_tls) for aioweb via one injectable TLSSession, config-free, installable."
 requires-python = ">=3.10"
 dependencies = [
-    "aioweb @ git+ssh://git@git.rethinkstudios.io/rethink-public/aioweb.git@v0.1.0",
+    "aioweb @ git+ssh://git@git.rethinkstudios.io/rethink-public/aioweb.git@v0.1.5",
 ]
 
 [project.optional-dependencies]
diff --git a/src/aioweb_tls/backends.py b/src/aioweb_tls/backends.py
index 475d45a..686efdc 100644
--- a/src/aioweb_tls/backends.py
+++ b/src/aioweb_tls/backends.py
@@ -60,7 +60,12 @@ def _coerce_timeout(value):
 
 
 def _jar_to_dict(session):
-    """best-effort map of a requests-style cookie jar on session to a plain dict"""
+    """best-effort map of a requests-style cookie jar on session to a plain dict
+
+    intentionally broad: this feeds preview() only, the two backends expose differently-
+    shaped jars, and a cookie read must never crash a request — so any jar that doesn't
+    iterate cleanly degrades to {} rather than raising.
+    """
     jar = getattr(session, "cookies", None)
     if not jar:
         return {}
@@ -111,7 +116,12 @@ class CurlCffi:
             response = await session.request(method, url, impersonate=impersonate, **kwargs)
         except aiohttp.ClientError:
             raise
-        except Exception as error:
+        except asyncio.TimeoutError:
+            raise
+        except OSError as error:
+            # curl_cffi's RequestException subclasses OSError; translate the native
+            # network error into aiohttp.ClientError. narrowed from a bare Exception so a
+            # real bug (AttributeError/TypeError) isn't laundered into 'client error'
             raise _as_client_error(error, "curl_cffi") from error
         content = response.content if response.content is not None else b""
         return Response(
@@ -230,7 +240,11 @@ class Noble:
             response = await session.execute_request(method=method.upper(), url=url, **kwargs)
         except aiohttp.ClientError:
             raise
-        except Exception as error:
+        except asyncio.TimeoutError:
+            raise
+        except OSError as error:
+            # noble_tls's TLSClientException subclasses IOError (== OSError); translate
+            # the native network error, narrowed from bare Exception so a real bug surfaces
             raise _as_client_error(error, "noble_tls") from error
         content = getattr(response, "content", None)
         if content is None: