diff --git a/.github/workflows/check.yml b/.github/workflows/check.yml
index 6b977f7..56144ca 100644
--- a/.github/workflows/check.yml
+++ b/.github/workflows/check.yml
@@ -7,7 +7,7 @@ on:
     branches: [main]
 
 env:
-  ZIG_VERSION: 0.14.0-dev.1550+4fba7336a
+  ZIG_VERSION: 0.13.0
 
 jobs:
   build:
diff --git a/.github/workflows/docs.yml b/.github/workflows/docs.yml
index adef7a1..4a2f31a 100644
--- a/.github/workflows/docs.yml
+++ b/.github/workflows/docs.yml
@@ -7,7 +7,7 @@ on:
 permissions: write-all
 
 env:
-  ZIG_VERSION: 0.14.0-dev.1550+4fba7336a
+  ZIG_VERSION: 0.13.0
 
 jobs:
   docs:
diff --git a/build.zig b/build.zig
index f337d32..c56f905 100644
--- a/build.zig
+++ b/build.zig
@@ -21,6 +21,10 @@ const external_dependencies = [_]build_helpers.Dependency{
         .name = "bitcoin-primitives",
         .module_name = "bitcoin-primitives",
     },
+    .{
+        .name = "libxev",
+        .module_name = "xev",
+    },
 };
 
 pub fn build(b: *std.Build) !void {
diff --git a/build.zig.zon b/build.zig.zon
index 8a26c05..ea0f537 100644
--- a/build.zig.zon
+++ b/build.zig.zon
@@ -6,14 +6,6 @@
             .url = "https://github.com/karlseguin/zul/archive/ae0c27350c0db6b460f22cba30b6b0c4a02d1ffd.zip",
             .hash = "1220457e2c8867f6734520d9b335f01e1d851d6fe7adaa7f6f0756158acaf6c5e87f",
         },
-        .httpz = .{
-            .url = "git+https://github.com/karlseguin/http.zig#d3e3fb3cf2f3caa2432338282dbe750f85e24254",
-            .hash = "12205748a52926d9e6dbb1ac07462d8772c1e2fd6f52e4d822d8bf282f425efd1330",
-        },
-        .clap = .{
-            .url = "git+https://github.com/Hejsil/zig-clap#2d9db156ae928860a9acf2f1260750d3b44a4c98",
-            .hash = "122005e589ab3b6bff8e589b45f5b12cd27ce79f266bdac17e9f33ebfe2fbaff7fe3",
-        },
         .lmdb = .{
             .url = "git+https://github.com/zig-bitcoin/zig-lmdb#eb7436d091464131551759b0f80d4f1d1a15ece1",
             .hash = "1220f9e1eb744c8dc2750c1e6e1ceb1c2d521bedb161ddead1a6bb772032e576d74a",
@@ -22,6 +14,18 @@
             .url = "git+https://github.com/zig-bitcoin/bitcoin-primitives#6595846b34c8c157175c52380f5c7cc6fc9ca108",
             .hash = "12208a138853cd57db1c5e3348d60a74aa54d5c0a63393b6367098f1c150a0c31438",
         },
+        .clap = .{
+            .url = "https://github.com/Hejsil/zig-clap/archive/refs/tags/0.9.1.tar.gz",
+            .hash = "122062d301a203d003547b414237229b09a7980095061697349f8bef41be9c30266b",
+        },
+        .libxev = .{
+            .url = "https://github.com/mitchellh/libxev/archive/main.tar.gz",
+            .hash = "1220612bc023c21d75234882ec9a8c6a1cbd9d642da3dfb899297f14bb5bd7b6cd78",
+        },
+        .httpz = .{
+            .url = "https://github.com/karlseguin/http.zig/archive/zig-0.13.tar.gz",
+            .hash = "12208c1f2c5f730c4c03aabeb0632ade7e21914af03e6510311b449458198d0835d6",
+        },
     },
     .paths = .{
         "build.zig",
diff --git a/src/network/protocol/messages/lib.zig b/src/network/protocol/messages/lib.zig
index fa25f2d..8d897d9 100644
--- a/src/network/protocol/messages/lib.zig
+++ b/src/network/protocol/messages/lib.zig
@@ -18,7 +18,6 @@ const Sha256 = std.crypto.hash.sha2.Sha256;
 pub const NotFoundMessage = @import("notfound.zig").NotFoundMessage;
 pub const SendHeadersMessage = @import("sendheaders.zig").SendHeadersMessage;
 pub const FilterLoadMessage = @import("filterload.zig").FilterLoadMessage;
-pub const GetdataMessage = @import("getdata.zig").GetdataMessage;
 pub const HeadersMessage = @import("headers.zig").HeadersMessage;
 pub const CmpctBlockMessage = @import("cmpctblock.zig").CmpctBlockMessage;
 
@@ -98,10 +97,7 @@ pub const Message = union(MessageTypes) {
             .block => |*m| m.deinit(allocator),
             .filteradd => |*m| m.deinit(allocator),
             .getdata => |*m| m.deinit(allocator),
-            .notfound => {},
             .cmpctblock => |*m| m.deinit(allocator),
-            .sendheaders => {},
-            .filterload => {},
             .headers => |*m| m.deinit(allocator),
             else => {}
         }
@@ -125,7 +121,7 @@ pub const Message = union(MessageTypes) {
             .notfound => |*m| m.checksum(),
             .sendheaders => |*m| m.checksum(),
             .filterload => |*m| m.checksum(),
-            .getdata => |m| *m.checksum(),
+            .getdata => |*m| m.checksum(),
             .headers => |*m| m.checksum(),
             .cmpctblock => |*m| m.checksum(),
         };
diff --git a/src/network/rpc.zig b/src/network/rpc.zig
index 56c24de..7e0e44a 100644
--- a/src/network/rpc.zig
+++ b/src/network/rpc.zig
@@ -54,13 +54,12 @@ pub const RPC = struct {
     /// The RPC server will start a HTTP server and listen on the RPC port.
     pub fn start(self: *RPC) !void {
         std.log.info("Starting RPC server on port {}", .{self.config.rpc_port});
-        var handler = Handler{};
 
-        var server = try httpz.Server(*Handler).init(self.allocator, .{ .port = self.config.rpc_port }, &handler);
-        var router = server.router(.{});
+        var server = try httpz.Server().init(self.allocator, .{ .port = self.config.rpc_port });
+        var router = server.router();
         // Register routes.
-        router.get("/", index, .{});
-        router.get("/error", @"error", .{});
+        router.get("/", index);
+        router.get("/error", @"error");
 
         std.log.info("RPC server listening on http://localhost:{d}/\n", .{self.config.rpc_port});
 
@@ -74,7 +73,7 @@ const Handler = struct {
 
     // If the handler defines a special "notFound" function, it'll be called
     // when a request is made and no route matches.
-    pub fn notFound(_: *Handler, _: *httpz.Request, res: *httpz.Response) !void {
+    pub fn notFound(_: *httpz.Request, res: *httpz.Response) !void {
         res.status = 404;
         res.body = "NOPE!";
     }
@@ -83,7 +82,7 @@ const Handler = struct {
     // called when an action returns an error.
     // Note that this function takes an additional parameter (the error) and
     // returns a `void` rather than a `!void`.
-    pub fn uncaughtError(_: *Handler, req: *httpz.Request, res: *httpz.Response, err: anyerror) void {
+    pub fn uncaughtError(req: *httpz.Request, res: *httpz.Response, err: anyerror) void {
         std.debug.print("uncaught http error at {s}: {}\n", .{ req.url.path, err });
 
         // Alternative to res.content_type = .TYPE
@@ -96,13 +95,13 @@ const Handler = struct {
     }
 };
 
-fn index(_: *Handler, _: *httpz.Request, res: *httpz.Response) !void {
+fn index(_: *httpz.Request, res: *httpz.Response) !void {
     res.body =
         \\<!DOCTYPE html>
         \\ <p>Running Bitcoin.
     ;
 }
 
-fn @"error"(_: *Handler, _: *httpz.Request, _: *httpz.Response) !void {
+fn @"error"(_: *httpz.Request, _: *httpz.Response) !void {
     return error.ActionError;
 }
diff --git a/src/vanitygen.zig b/src/vanitygen.zig
index cf33704..74f3dbf 100644
--- a/src/vanitygen.zig
+++ b/src/vanitygen.zig
@@ -151,7 +151,6 @@ fn threadSearcher(
         // send to sender
 
         if (f) {
-            @branchHint(.cold);
             return sender.send(keys_and_address) catch return;
         }
     }