diff --git a/docs/API.md b/docs/API.md
index 10a3475..09bd760 100644
--- a/docs/API.md
+++ b/docs/API.md
@@ -32,8 +32,8 @@ trusting an address supplied by the game client.
   "port": 7777,
   "current_players": 0,
   "max_players": 8,
-  "game_version": "0.20.1-alpha",
-  "protocol_version": 12
+  "game_version": "0.19.0-alpha",
+  "protocol_version": 11
 }
 ```
 
diff --git a/pyproject.toml b/pyproject.toml
index 96aef53..46131ce 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,7 +4,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "straywild-discovery-server"
-version = "0.20.1-alpha"
+version = "0.19.0-alpha"
 description = "Ephemeral public-room directory for straywild"
 requires-python = ">=3.11"
 dependencies = []
diff --git a/straywild_discovery/__init__.py b/straywild_discovery/__init__.py
index 166a540..30b38b2 100644
--- a/straywild_discovery/__init__.py
+++ b/straywild_discovery/__init__.py
@@ -1,3 +1,3 @@
 """straywild discovery service."""
 
-__version__ = "0.20.1-alpha"
+__version__ = "0.19.0-alpha"
diff --git a/tests/test_http_api.py b/tests/test_http_api.py
index 96cbb38..135b47e 100644
--- a/tests/test_http_api.py
+++ b/tests/test_http_api.py
@@ -20,8 +20,8 @@ VALID_ROOM = {
     "port": 7777,
     "current_players": 1,
     "max_players": 8,
-    "game_version": "0.20.1-alpha",
-    "protocol_version": 12,
+    "game_version": "0.19.0-alpha",
+    "protocol_version": 11,
 }
 
 
@@ -86,7 +86,7 @@ class DiscoveryHTTPTests(unittest.TestCase):
         self.assertIsInstance(room_id, str)
         self.assertIsInstance(token, str)
 
-        status, listing = self.request("GET", "/v1/rooms?protocol_version=12")
+        status, listing = self.request("GET", "/v1/rooms?protocol_version=11")
         self.assertEqual(status, 200)
         assert listing is not None
         listed_rooms = listing["rooms"]
@@ -102,7 +102,7 @@ class DiscoveryHTTPTests(unittest.TestCase):
         assert updated is not None
         self.assertEqual(updated["error"]["code"], "game_version_mismatch")
         self.assertEqual(
-            updated["error"]["required_game_version"], "0.20.1-alpha"
+            updated["error"]["required_game_version"], "0.19.0-alpha"
         )
 
         status, updated = self.request(
@@ -135,7 +135,7 @@ class DiscoveryHTTPTests(unittest.TestCase):
         error = body["error"]
         assert isinstance(error, dict)
         self.assertEqual(error["code"], "game_version_mismatch")
-        self.assertEqual(error["required_game_version"], "0.20.1-alpha")
+        self.assertEqual(error["required_game_version"], "0.19.0-alpha")
         self.assertIn("will not be listed", str(error["message"]))
 
     def test_empty_dedicated_room_can_be_listed(self) -> None:
@@ -201,7 +201,7 @@ class DiscoveryHTTPTests(unittest.TestCase):
         self.assertEqual(status, 200)
         assert body is not None
         self.assertEqual(body["status"], "ok")
-        self.assertEqual(body["version"], "0.20.1-alpha")
+        self.assertEqual(body["version"], "0.19.0-alpha")
         self.assertEqual(body["build_revision"], "test-build")
 
     def test_live_friend_presence_and_invitation_endpoints(self) -> None:
diff --git a/tests/test_registry.py b/tests/test_registry.py
index d0d5ff5..1e921b6 100644
--- a/tests/test_registry.py
+++ b/tests/test_registry.py
@@ -16,8 +16,8 @@ VALID_ROOM = {
     "port": 7777,
     "current_players": 1,
     "max_players": 8,
-    "game_version": "0.20.1-alpha",
-    "protocol_version": 12,
+    "game_version": "0.19.0-alpha",
+    "protocol_version": 11,
 }
 
 
@@ -112,7 +112,7 @@ class RoomRegistryTests(unittest.TestCase):
             "203.0.113.11",
             dict(VALID_ROOM, room_name="Older Room", protocol_version=3),
         )
-        self.assertEqual(self.registry.list_rooms(protocol_version=12), [expected])
+        self.assertEqual(self.registry.list_rooms(protocol_version=11), [expected])
         self.assertEqual(self.registry.list_rooms(game_version="missing"), [])
 
     def test_room_limits_bound_untrusted_advertisements(self) -> None:
diff --git a/tests/test_social_registry.py b/tests/test_social_registry.py
index 644604e..7611b75 100644
--- a/tests/test_social_registry.py
+++ b/tests/test_social_registry.py
@@ -12,8 +12,8 @@ from straywild_discovery.social_registry import (
 )
 
 
-GAME_VERSION = "0.20.1-alpha"
-PROTOCOL_VERSION = 12
+GAME_VERSION = "0.19.0-alpha"
+PROTOCOL_VERSION = 11
 VALID_ROOM = {
     "room_name": "Pond Friends",
     "port": 7777,