diff --git a/CHANGELOG.md b/CHANGELOG.md
index b626b0b..a9ee1d9 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,16 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [0.5.13] - 2026-07-16
+
+### Added
+
+- Advertise NIP-51 (lists) in the relay information document, and document + test relay support for Marmot MLS KeyPackage events (#158)
+
+### Changed
+
+- Shard the rate limiters and reuse broadcast scratch buffers to cut worker lock contention under load (#151)
+
 ## [0.5.12] - 2026-07-09
 
 ### Fixed
diff --git a/build.zig.zon b/build.zig.zon
index 26d2d23..614621b 100644
--- a/build.zig.zon
+++ b/build.zig.zon
@@ -1,6 +1,6 @@
 .{
     .name = .wisp,
-    .version = "0.5.12",
+    .version = "0.5.13",
     .fingerprint = 0xc4bdec9fe6401a8d,
     .dependencies = .{
         // websocket.zig: client for spider outbound connections and the epoll
diff --git a/src/main.zig b/src/main.zig
index 1a2a3fe..671c213 100644
--- a/src/main.zig
+++ b/src/main.zig
@@ -156,7 +156,7 @@ pub fn main(init: std.process.Init) !void {
         return error.InvalidSyncMode;
     };
 
-    std.log.info("Wisp v0.5.12 starting", .{});
+    std.log.info("Wisp v0.5.13 starting", .{});
     std.log.info("Listening on {s}:{d}", .{ config.host, config.port });
     std.log.info("Storage: {s} (sync={s})", .{ config.storage_path, @tagName(sync_mode) });
 
diff --git a/src/nip11.zig b/src/nip11.zig
index 3e1f28c..86cbcce 100644
--- a/src/nip11.zig
+++ b/src/nip11.zig
@@ -43,7 +43,7 @@ pub fn write(config: *const Config, nip86: *const Nip86Handler, w: anytype) !voi
 
     try w.writeAll(",\"supported_nips\":[1,2,9,11,13,16,33,40,42,45,50,51,65,70,77,86]");
     try w.writeAll(",\"software\":\"https://github.com/privkeyio/wisp\"");
-    try w.writeAll(",\"version\":\"0.5.12\"");
+    try w.writeAll(",\"version\":\"0.5.13\"");
 
     try w.writeAll(",\"limitation\":{");
     try w.print("\"max_message_length\":{d}", .{config.max_message_size});