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-rw-r--r--docker/Dockerfile2
1 files changed, 1 insertions, 1 deletions
diff --git a/docker/Dockerfile b/docker/Dockerfile
index 791cd6936b..afd896ffc1 100644
--- a/docker/Dockerfile
+++ b/docker/Dockerfile
@@ -37,7 +37,7 @@ RUN pip install --prefix="/install" --no-warn-script-location \
         jaeger-client \
         opentracing \
         # Match the version constraints of Synapse
-        "prometheus_client>=0.4.0,<0.9.0" \
+        "prometheus_client>=0.4.0" \
         psycopg2 \
         pycparser \
         pyrsistent \