diff --git a/synapse/python_dependencies.py b/synapse/python_dependencies.py
index 11ace2bfb1..4b697b0b2b 100644
--- a/synapse/python_dependencies.py
+++ b/synapse/python_dependencies.py
@@ -77,6 +77,9 @@ REQUIREMENTS = [
     "attrs>=17.4.0",
 
     "netaddr>=0.7.18",
+
+    # Opentracing
+    "jaeger-client>=4.0.0",
 ]
 
 CONDITIONAL_REQUIREMENTS = {