diff --git a/Cargo.lock b/Cargo.lock
index bd4d6e1bbd..6b194de419 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1,10 +1,16 @@
 # This file is automatically @generated by Cargo.
 # It is not intended for manual editing.
-version = 3
+version = 4
+
+[[package]]
+name = "anstyle"
+version = "1.0.10"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "55cc3b69f167a1ef2e161439aa98aed94e6028e5f9a59be9a6ffb47aef1651f9"
 
 [[package]]
 name = "capnp-sys"
-version = "1.1.0"
+version = "1.2.0"
 dependencies = [
  "cc",
  "cxx",
@@ -15,64 +21,106 @@ dependencies = [
 
 [[package]]
 name = "cc"
-version = "1.1.25"
+version = "1.2.21"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e8d9e0b4957f635b8d3da819d0db5603620467ecf1f692d22a8c2717ce27e6d8"
+checksum = "8691782945451c1c383942c4874dbe63814f61cb57ef773cda2972682b7bb3c0"
 dependencies = [
  "shlex",
 ]
 
+[[package]]
+name = "clap"
+version = "4.5.37"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "eccb054f56cbd38340b380d4a8e69ef1f02f1af43db2f0cc817a4774d80ae071"
+dependencies = [
+ "clap_builder",
+]
+
+[[package]]
+name = "clap_builder"
+version = "4.5.37"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "efd9466fac8543255d3b1fcad4762c5e116ffe808c8a3043d4263cd4fd4862a2"
+dependencies = [
+ "anstyle",
+ "clap_lex",
+ "strsim",
+]
+
+[[package]]
+name = "clap_lex"
+version = "0.7.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f46ad14479a25103f283c0f10005961cf086d8dc42205bb44c46ac563475dca6"
+
 [[package]]
 name = "codespan-reporting"
-version = "0.11.1"
+version = "0.12.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3538270d33cc669650c4b093848450d380def10c331d38c768e34cac80576e6e"
+checksum = "fe6d2e5af09e8c8ad56c969f2157a3d4238cebc7c55f0a517728c38f7b200f81"
 dependencies = [
+ "serde",
  "termcolor",
  "unicode-width",
 ]
 
 [[package]]
 name = "cxx"
-version = "1.0.128"
+version = "1.0.158"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "54ccead7d199d584d139148b04b4a368d1ec7556a1d9ea2548febb1b9d49f9a4"
+checksum = "a71ea7f29c73f7ffa64c50b83c9fe4d3a6d4be89a86b009eb80d5a6d3429d741"
 dependencies = [
  "cc",
+ "cxxbridge-cmd",
  "cxxbridge-flags",
  "cxxbridge-macro",
+ "foldhash",
  "link-cplusplus",
 ]
 
 [[package]]
 name = "cxx-build"
-version = "1.0.128"
+version = "1.0.158"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c77953e99f01508f89f55c494bfa867171ef3a6c8cea03d26975368f2121a5c1"
+checksum = "36a8232661d66dcf713394726157d3cfe0a89bfc85f52d6e9f9bbc2306797fe7"
 dependencies = [
  "cc",
  "codespan-reporting",
- "once_cell",
  "proc-macro2",
  "quote",
  "scratch",
  "syn",
 ]
 
+[[package]]
+name = "cxxbridge-cmd"
+version = "1.0.158"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4f44296c8693e9ea226a48f6a122727f77aa9e9e338380cb021accaeeb7ee279"
+dependencies = [
+ "clap",
+ "codespan-reporting",
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
 [[package]]
 name = "cxxbridge-flags"
-version = "1.0.128"
+version = "1.0.158"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "65777e06cc48f0cb0152024c77d6cf9e4bdb4408e7b48bea993d42fa0f5b02b6"
+checksum = "c42f69c181c176981ae44ba9876e2ea41ce8e574c296b38d06925ce9214fb8e4"
 
 [[package]]
 name = "cxxbridge-macro"
-version = "1.0.128"
+version = "1.0.158"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "98532a60dedaebc4848cb2cba5023337cc9ea3af16a5b062633fabfd9f18fb60"
+checksum = "8faff5d4467e0709448187df29ccbf3b0982cc426ee444a193f87b11afb565a8"
 dependencies = [
  "proc-macro2",
  "quote",
+ "rustversion",
  "syn",
 ]
 
@@ -86,6 +134,12 @@ dependencies = [
  "once_cell",
 ]
 
+[[package]]
+name = "foldhash"
+version = "0.1.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d9c4f5dac5e15c24eb999c26181a6ca40b39fe946cbe4c263c7209467bc83af2"
+
 [[package]]
 name = "indenter"
 version = "0.3.3"
@@ -94,7 +148,7 @@ checksum = "ce23b50ad8242c51a442f3ff322d56b02f08852c77e4c0b4d3fd684abc89c683"
 
 [[package]]
 name = "kj-sys"
-version = "1.1.0"
+version = "1.2.0"
 dependencies = [
  "cc",
  "cxx",
@@ -104,42 +158,68 @@ dependencies = [
 
 [[package]]
 name = "link-cplusplus"
-version = "1.0.9"
+version = "1.0.10"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9d240c6f7e1ba3a28b0249f774e6a9dd0175054b52dfbb61b16eb8505c3785c9"
+checksum = "4a6f6da007f968f9def0d65a05b187e2960183de70c160204ecfccf0ee330212"
 dependencies = [
  "cc",
 ]
 
 [[package]]
 name = "once_cell"
-version = "1.20.2"
+version = "1.21.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1261fe7e33c73b354eab43b1273a57c8f967d0391e80353e51f764ac02cf6775"
+checksum = "42f5e15c9953c5e4ccceeb2e7382a716482c34515315f7b03532b8b4e8393d2d"
 
 [[package]]
 name = "proc-macro2"
-version = "1.0.86"
+version = "1.0.95"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5e719e8df665df0d1c8fbfd238015744736151d4445ec0836b8e628aae103b77"
+checksum = "02b3e5e68a3a1a02aad3ec490a98007cbc13c37cbe84a3cd7b8e406d76e7f778"
 dependencies = [
  "unicode-ident",
 ]
 
 [[package]]
 name = "quote"
-version = "1.0.37"
+version = "1.0.40"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b5b9d34b8991d19d98081b46eacdd8eb58c6f2b201139f7c5f643cc155a633af"
+checksum = "1885c039570dc00dcb4ff087a89e185fd56bae234ddc7f056a945bf36467248d"
 dependencies = [
  "proc-macro2",
 ]
 
+[[package]]
+name = "rustversion"
+version = "1.0.20"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "eded382c5f5f786b989652c49544c4877d9f015cc22e145a5ea8ea66c2921cd2"
+
 [[package]]
 name = "scratch"
-version = "1.0.7"
+version = "1.0.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9f6280af86e5f559536da57a45ebc84948833b3bee313a7dd25232e09c878a52"
+
+[[package]]
+name = "serde"
+version = "1.0.219"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a3cf7c11c38cb994f3d40e8a8cde3bbd1f72a435e4c49e85d6553d8312306152"
+checksum = "5f0e2c6ed6606019b4e29e69dbaba95b11854410e5347d525002456dbbb786b6"
+dependencies = [
+ "serde_derive",
+]
+
+[[package]]
+name = "serde_derive"
+version = "1.0.219"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5b0276cf7f2c73365f7157c8123c21cd9a50fbbd844757af28ca1f5925fc2a00"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
 
 [[package]]
 name = "shlex"
@@ -147,11 +227,17 @@ version = "1.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "0fda2ff0d084019ba4d7c6f371c95d8fd75ce3524c3cb8fb653a3023f6323e64"
 
+[[package]]
+name = "strsim"
+version = "0.11.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7da8b5736845d9f2fcb837ea5d9e2628564b3b043a70948a3f0b778838c5fb4f"
+
 [[package]]
 name = "syn"
-version = "2.0.79"
+version = "2.0.101"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "89132cd0bf050864e1d38dc3bbc07a0eb8e7530af26344d3d2bbbef83499f590"
+checksum = "8ce2b7fc941b3a24138a0a7cf8e858bfc6a992e7978a068a5c760deb0ed43caf"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -169,15 +255,15 @@ dependencies = [
 
 [[package]]
 name = "unicode-ident"
-version = "1.0.13"
+version = "1.0.18"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e91b56cd4cadaeb79bbf1a5645f6b4f8dc5bde8834ad5894a8db35fda9efa1fe"
+checksum = "5a5f39404a5da50712a4c1eecf25e90dd62b613502b7e925fd4e4d19b5c96512"
 
 [[package]]
 name = "unicode-width"
-version = "0.1.14"
+version = "0.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7dd6e30e90baa6f72411720665d41d89b9a3d039dc45b8faea1ddd07f617f6af"
+checksum = "1fc81956842c57dac11422a97c3b8195a1ff727f06e85c84ed2e8aa277c9a0fd"
 
 [[package]]
 name = "winapi-util"
diff --git a/Cargo.toml b/Cargo.toml
index 00b2ddeb6f..de19fd1ecf 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -3,17 +3,17 @@ resolver = "2"
 members = ["c++/src/capnp", "c++/src/kj"]
 
 [workspace.package]
-version = "1.1.0"
-edition = "2021"
-rust-version = "1.81.0"
+version = "1.2.0"
+edition = "2024"
+rust-version = "1.86.0"
 license = "MIT"
 repository = "https://github.com/fundament-software/capstone"
 documentation = "https://capnproto.org/"
 readme = "README.md"
 
 [workspace.dependencies]
-cxx = "1.0.76"
-eyre = "0.6.12"
-cc = "1.0.73"
-cxx-build = "1.0.76"
+cxx = "1.0"
+eyre = "0.6"
+cc = "1.0"
+cxx-build = "1.0"
 kj-sys = { path = "c++/src/kj" }
diff --git a/c++/src/kj/build.rs b/c++/src/kj/build.rs
index 5f2725f0d9..ef7ca468c1 100644
--- a/c++/src/kj/build.rs
+++ b/c++/src/kj/build.rs
@@ -1,5 +1,5 @@
-use eyre::eyre;
 use eyre::Result;
+use eyre::eyre;
 use std::{env, path::Path};
 
 const CAPNP_HEAVY: bool = cfg!(feature = "heavy");
@@ -104,11 +104,7 @@ static KJ_GZIP_SOURCES: &[&str] = &["compat/gzip.c++"];
 static KJ_GZIP_HEADERS: &[&str] = &["compat/gzip.h"];
 
 fn get_predicate(predicate: bool, src: &'static [&'static str]) -> &'static [&'static str] {
-    if predicate {
-        src
-    } else {
-        &[]
-    }
+    if predicate { src } else { &[] }
 }
 static KJ_ASYNC_PRIVATE_HEADERS: &[&str] = &["async-io-internal.h", "miniposix.h"];
 
diff --git a/deny.toml b/deny.toml
index 16f36c1cfa..7b983a26fc 100644
--- a/deny.toml
+++ b/deny.toml
@@ -18,6 +18,7 @@ allow = [
     "Zlib",
     "MPL-2.0",
     "BSD-3-Clause",
+    "Unicode-3.0",
 ]
 confidence-threshold = 0.8
 exceptions = [
diff --git a/flake.lock b/flake.lock
index 47cb11916d..3a9686ee91 100644
--- a/flake.lock
+++ b/flake.lock
@@ -3,11 +3,11 @@
     "advisory-db": {
       "flake": false,
       "locked": {
-        "lastModified": 1727881133,
-        "narHash": "sha256-nnfwJjLA0uVIBgrGNYt9ButjBQFyj/I6MohQUHhJ78A=",
+        "lastModified": 1746689539,
+        "narHash": "sha256-rVUs0CjpuO7FKVHecsuMaYiUr8iKscsgeo/b2XlnPmQ=",
         "owner": "rustsec",
         "repo": "advisory-db",
-        "rev": "a68ca4a1ec3950da7c82c522e8cfc424e28ca7f0",
+        "rev": "796d034fbcb1c5bc83c0d0912dc31eb4e34458bf",
         "type": "github"
       },
       "original": {
@@ -18,11 +18,11 @@
     },
     "crane": {
       "locked": {
-        "lastModified": 1727974419,
-        "narHash": "sha256-WD0//20h+2/yPGkO88d2nYbb23WMWYvnRyDQ9Dx4UHg=",
+        "lastModified": 1746291859,
+        "narHash": "sha256-DdWJLA+D5tcmrRSg5Y7tp/qWaD05ATI4Z7h22gd1h7Q=",
         "owner": "ipetkov",
         "repo": "crane",
-        "rev": "37e4f9f0976cb9281cd3f0c70081e5e0ecaee93f",
+        "rev": "dfd9a8dfd09db9aad544c4d3b6c47b12562544a5",
         "type": "github"
       },
       "original": {
@@ -36,11 +36,11 @@
         "systems": "systems"
       },
       "locked": {
-        "lastModified": 1726560853,
-        "narHash": "sha256-X6rJYSESBVr3hBoH0WbKE5KvhPU5bloyZ2L4K60/fPQ=",
+        "lastModified": 1731533236,
+        "narHash": "sha256-l0KFg5HjrsfsO/JpG+r7fRrqm12kzFHyUHqHCVpMMbI=",
         "owner": "numtide",
         "repo": "flake-utils",
-        "rev": "c1dfcf08411b08f6b8615f7d8971a2bfa81d5e8a",
+        "rev": "11707dc2f618dd54ca8739b309ec4fc024de578b",
         "type": "github"
       },
       "original": {
@@ -51,27 +51,27 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1728067476,
-        "narHash": "sha256-/uJcVXuBt+VFCPQIX+4YnYrHaubJSx4HoNsJVNRgANM=",
+        "lastModified": 1746557022,
+        "narHash": "sha256-QkNoyEf6TbaTW5UZYX0OkwIJ/ZMeKSSoOMnSDPQuol0=",
         "owner": "nixos",
         "repo": "nixpkgs",
-        "rev": "6e6b3dd395c3b1eb9be9f2d096383a8d05add030",
+        "rev": "1d3aeb5a193b9ff13f63f4d9cc169fb88129f860",
         "type": "github"
       },
       "original": {
         "owner": "nixos",
-        "ref": "nixos-24.05",
+        "ref": "nixos-24.11",
         "repo": "nixpkgs",
         "type": "github"
       }
     },
     "nixpkgs_2": {
       "locked": {
-        "lastModified": 1718428119,
-        "narHash": "sha256-WdWDpNaq6u1IPtxtYHHWpl5BmabtpmLnMAx0RdJ/vo8=",
+        "lastModified": 1744536153,
+        "narHash": "sha256-awS2zRgF4uTwrOKwwiJcByDzDOdo3Q1rPZbiHQg/N38=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "e6cea36f83499eb4e9cd184c8a8e823296b50ad5",
+        "rev": "18dd725c29603f582cf1900e0d25f9f1063dbf11",
         "type": "github"
       },
       "original": {
@@ -95,11 +95,11 @@
         "nixpkgs": "nixpkgs_2"
       },
       "locked": {
-        "lastModified": 1728181869,
-        "narHash": "sha256-sQXHXsjIcGEoIHkB+RO6BZdrPfB+43V1TEpyoWRI3ww=",
+        "lastModified": 1746758179,
+        "narHash": "sha256-JECUw1YBEsTsVauvupRzE5ykZaJoyhHCpoY87ZZJGas=",
         "owner": "oxalica",
         "repo": "rust-overlay",
-        "rev": "cd46aa3906c14790ef5cbe278d9e54f2c38f95c0",
+        "rev": "4fd00513eac6b6140c5dced3e1b8133e2369a0f8",
         "type": "github"
       },
       "original": {
diff --git a/flake.nix b/flake.nix
index 65a1f4ed09..bbcd5a1775 100644
--- a/flake.nix
+++ b/flake.nix
@@ -1,13 +1,10 @@
 {
   inputs = {
-    nixpkgs.url = "github:nixos/nixpkgs/nixos-24.05";
+    nixpkgs.url = "github:nixos/nixpkgs/nixos-24.11";
     rust-overlay.url = "github:oxalica/rust-overlay";
     flake-utils.url = "github:numtide/flake-utils";
 
-    crane = {
-      url = "github:ipetkov/crane";
-      inputs.nixpkgs.follows = "nixpkgs";
-    };
+    crane.url = "github:ipetkov/crane";
     advisory-db = {
       url = "github:rustsec/advisory-db";
       flake = false;
@@ -39,7 +36,7 @@
 
     in
     rec {
-      devShell = (pkgs.mkShell.override { stdenv = pkgs.stdenvAdapters.useMoldLinker pkgs.llvmPackages_15.stdenv; }) {
+      devShells.default = (pkgs.mkShell.override { stdenv = pkgs.stdenvAdapters.useMoldLinker pkgs.llvmPackages_15.stdenv; }) {
         buildInputs = with pkgs; [
           openssl
           zlib
@@ -59,8 +56,6 @@
         RUSTFLAGS="-C linker=clang -C link-arg=-fuse-ld=${pkgs.mold}/bin/mold";
       };
 
-      default = { };
-
       # capnproto = pkgs.llvmPackages_15.stdenv.mkDerivation {
       #   pname = "capnproto";
       #   version = "2.0";
@@ -85,7 +80,7 @@
             buildInputs = with pkgs; [ pkg-config openssl zlib ];
             strictDeps = true;
             version = "0.1.0";
-            stdenv = pkgs.stdenvAdapters.useMoldLinker pkgs.llvmPackages_15.stdenv;
+            stdenv = pkgs: pkgs.stdenvAdapters.useMoldLinker pkgs.llvmPackages_15.stdenv;
             CARGO_BUILD_RUSTFLAGS="-C linker=clang -C link-arg=-fuse-ld=${pkgs.mold}/bin/mold";
           };
           pname = "capnp-checks";