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-rw-r--r--synapse/metrics/__init__.py10
-rw-r--r--synapse/python_dependencies.py3
2 files changed, 10 insertions, 3 deletions
diff --git a/synapse/metrics/__init__.py b/synapse/metrics/__init__.py
index 9e6c1b2f3b..cca084c18c 100644
--- a/synapse/metrics/__init__.py
+++ b/synapse/metrics/__init__.py
@@ -30,6 +30,7 @@ from typing import (
     Type,
     TypeVar,
     Union,
+    cast,
 )
 
 import attr
@@ -60,7 +61,7 @@ all_gauges: "Dict[str, Union[LaterGauge, InFlightGauge]]" = {}
 HAVE_PROC_SELF_STAT = os.path.exists("/proc/self/stat")
 
 
-class RegistryProxy:
+class _RegistryProxy:
     @staticmethod
     def collect() -> Iterable[Metric]:
         for metric in REGISTRY.collect():
@@ -68,6 +69,13 @@ class RegistryProxy:
                 yield metric
 
 
+# A little bit nasty, but collect() above is static so a Protocol doesn't work.
+# _RegistryProxy matches the signature of a CollectorRegistry instance enough
+# for it to be usable in the contexts in which we use it.
+# TODO Do something nicer about this.
+RegistryProxy = cast(CollectorRegistry, _RegistryProxy)
+
+
 @attr.s(slots=True, hash=True, auto_attribs=True)
 class LaterGauge:
 
diff --git a/synapse/python_dependencies.py b/synapse/python_dependencies.py
index 80786464c2..22b4606ae0 100644
--- a/synapse/python_dependencies.py
+++ b/synapse/python_dependencies.py
@@ -76,8 +76,7 @@ REQUIREMENTS = [
     "msgpack>=0.5.2",
     "phonenumbers>=8.2.0",
     # we use GaugeHistogramMetric, which was added in prom-client 0.4.0.
-    # 0.13.0 has an incorrect type annotation, see #11832.
-    "prometheus_client>=0.4.0,<0.13.0",
+    "prometheus_client>=0.4.0",
     # we use `order`, which arrived in attrs 19.2.0.
     # Note: 21.1.0 broke `/sync`, see #9936
     "attrs>=19.2.0,!=21.1.0",