diff --git a/changelog.d/3894.feature b/changelog.d/3894.feature
new file mode 100644
index 000000000..1ed0cccdb
--- /dev/null
+++ b/changelog.d/3894.feature
@@ -0,0 +1 @@
+Report "python_version" in the phone home stats
diff --git a/synapse/app/homeserver.py b/synapse/app/homeserver.py
index ac97e1964..3241ded18 100755
--- a/synapse/app/homeserver.py
+++ b/synapse/app/homeserver.py
@@ -457,6 +457,10 @@ def run(hs):
         stats["homeserver"] = hs.config.server_name
         stats["timestamp"] = now
         stats["uptime_seconds"] = uptime
+        version = sys.version_info
+        stats["python_version"] = "{}.{}.{}".format(
+            version.major, version.minor, version.micro
+        )
         stats["total_users"] = yield hs.get_datastore().count_all_users()
 
         total_nonbridged_users = yield hs.get_datastore().count_nonbridged_users()