diff --git a/repeater/web/update_endpoints.py b/repeater/web/update_endpoints.py
index 9cc031a..08c433f 100644
--- a/repeater/web/update_endpoints.py
+++ b/repeater/web/update_endpoints.py
@@ -693,6 +693,10 @@ def _fetch_latest_version(channel: str) -> str:
             raise RuntimeError(
                 f"Could not compare {base_tag}...{channel} on GitHub: {exc}"
             ) from exc
+        # On an exact tag (ahead_by == 0), setuptools-scm reports the tag
+        # itself, not next-patch.dev0.
+        if ahead_by <= 0:
+            return base_tag
         return _next_dev_version(base_tag, ahead_by)
 
     # Static version channel — read the pinned version from pyproject.toml on
diff --git a/tests/test_update_endpoints_unit.py b/tests/test_update_endpoints_unit.py
index e803331..26cc02a 100644
--- a/tests/test_update_endpoints_unit.py
+++ b/tests/test_update_endpoints_unit.py
@@ -337,6 +337,11 @@ def test_fetch_latest_version_dynamic_and_static(monkeypatch):
     dyn = ue._fetch_latest_version("dev")
     assert dyn == "1.0.6.dev3"
 
+    # Exact tag (ahead_by == 0) must resolve to the tag, not next.dev0.
+    monkeypatch.setattr(ue, "_fetch_url", lambda _url, timeout=10: '{"ahead_by": 0}')
+    on_tag = ue._fetch_latest_version("main")
+    assert on_tag == "1.0.5"
+
     # Static branch path parses version from pyproject content.
     monkeypatch.setattr(ue, "_branch_is_dynamic", lambda _ch: False)
     monkeypatch.setattr(