diff --git a/Cargo.lock b/Cargo.lock
index c44ae9ec..2865ec20 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -545,7 +545,7 @@ dependencies = [
 
 [[package]]
 name = "libloot"
-version = "0.26.3"
+version = "0.27.0"
 dependencies = [
  "crc32fast",
  "esplugin",
@@ -565,7 +565,7 @@ dependencies = [
 
 [[package]]
 name = "libloot-cpp"
-version = "0.26.3"
+version = "0.27.0"
 dependencies = [
  "cxx",
  "cxx-build",
@@ -576,14 +576,14 @@ dependencies = [
 
 [[package]]
 name = "libloot-ffi-errors"
-version = "0.26.3"
+version = "0.27.0"
 dependencies = [
  "libloot",
 ]
 
 [[package]]
 name = "libloot-nodejs"
-version = "0.26.3"
+version = "0.27.0"
 dependencies = [
  "libloot",
  "libloot-ffi-errors",
@@ -594,7 +594,7 @@ dependencies = [
 
 [[package]]
 name = "libloot-python"
-version = "0.26.3"
+version = "0.27.0"
 dependencies = [
  "libloot",
  "libloot-ffi-errors",
@@ -776,7 +776,7 @@ dependencies = [
 
 [[package]]
 name = "parameterized-test"
-version = "0.26.3"
+version = "0.27.0"
 dependencies = [
  "proc-macro2",
  "quote",
diff --git a/Cargo.toml b/Cargo.toml
index a4c7110a..2d14270f 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "libloot"
-version = "0.26.3"
+version = "0.27.0"
 edition = "2024"
 license = "GPL-3.0-or-later"
 
diff --git a/README.md b/README.md
index fc49583a..38fae966 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,6 @@
 # libloot-rs
 
-This is an **experimental** reimplementation of [libloot](https://github.com/loot/libloot) using Rust instead of C++, that should match libloot v0.26.2.
+This is an **experimental** reimplementation of [libloot](https://github.com/loot/libloot) using Rust instead of C++, that should match libloot v0.27.0.
 
 There is one intentional difference in behaviour: if a plugin has metadata but it is all filtered out when conditions are evaluated, getting its metadata returns `None` instead of a name-only PluginMetadata object.
 
diff --git a/cpp/CMakeLists.txt b/cpp/CMakeLists.txt
index ddee2140..3bf3f58f 100644
--- a/cpp/CMakeLists.txt
+++ b/cpp/CMakeLists.txt
@@ -234,7 +234,7 @@ endif()
 # Install
 ########################################
 
-set(LIBLOOT_VERSION "0.26.3")
+set(LIBLOOT_VERSION "0.27.0")
 
 set_property(TARGET loot PROPERTY VERSION ${LIBLOOT_VERSION})
 set_property(TARGET loot PROPERTY SOVERSION 0)
diff --git a/cpp/Cargo.toml b/cpp/Cargo.toml
index 772d14b5..b7c037a2 100644
--- a/cpp/Cargo.toml
+++ b/cpp/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "libloot-cpp"
-version = "0.26.3"
+version = "0.27.0"
 edition = "2024"
 license = "GPL-3.0-or-later"
 
diff --git a/cpp/README.md b/cpp/README.md
index 869c08cd..dd93b00c 100644
--- a/cpp/README.md
+++ b/cpp/README.md
@@ -1,6 +1,6 @@
 # libloot-rs C++ wrapper
 
-This is a wrapper around libloot that provides a C++ interface that's ABI-compatible with libloot v0.26.2.
+This is a wrapper around libloot that provides a C++ interface that's ABI-compatible with libloot v0.27.0.
 
 The wrapper has two layers:
 
diff --git a/cpp/docs/api/changelog.rst b/cpp/docs/api/changelog.rst
index 35622741..1b878f8b 100644
--- a/cpp/docs/api/changelog.rst
+++ b/cpp/docs/api/changelog.rst
@@ -2,6 +2,48 @@
 Version History
 ***************
 
+0.27.0 - 2025-06-08
+===================
+
+Added
+-----
+
+- :cpp:any:`loot::PluginNotLoadedError`, which is thrown when trying to sort a
+  load order that contains a plugin that hasn't been loaded, or when trying to
+  load a Morrowind, OpenMW or Starfield plugin that has a master that has not
+  been loaded.
+
+Changed
+-------
+
+- Windows builds that are built using MSVC (including official release builds)
+  are now built with the ``/GL`` flag to enable whole-program optimisation
+  (including link-time optimisation).
+- Official Windows builds are now built using MSVC 2022, so they now require the
+  MSVC 2022 redistributable to be installed.
+
+Removed
+-------
+
+- ``LogLevel::Fatal`` as it was never used.
+- ``ConditionalMetadata``, which was the parent class of :cpp:any:`loot::File`,
+  :cpp:any:`loot::Message` and :cpp:any:`loot::Tag`. Its ``GetCondition()``
+  member function has been moved to those child classes. There is no direct
+  replacement for its ``IsConditional()`` member function.
+- ``FileAccessError`` and ``ConditionSyntaxError``: ``std::runtime_error``
+  exceptions are thrown instead.
+- ``loot_condition_interpreter_category()`` as the error category it returned is
+  no longer used.
+- ``libloadorder_category()``, as errors reported by libloadorder are now thrown
+  as ``std::runtime_error`` exceptions instead of ``std::system_error``
+  exceptions.
+- ``esplugin_category()``, as errors reported by esplugin are now thrown as
+  either :cpp:any:`loot::PluginNotLoadedError` or ``std::runtime_error``
+  exceptions instead of ``std::system_error`` exceptions.
+- Support for the old Boost-style (e.g. ``%1%``) message placeholder syntax that
+  was replaced in the v0.21 metadata syntax by the curly brace syntax (e.g.
+  ``{0}``).
+
 0.26.3 - 2025-05-28
 ===================
 
diff --git a/cpp/docs/pyproject.toml b/cpp/docs/pyproject.toml
index 09a705e9..3c803e6c 100644
--- a/cpp/docs/pyproject.toml
+++ b/cpp/docs/pyproject.toml
@@ -1,6 +1,6 @@
 [project]
 name = "libloot-cpp-docs"
-version = "0.26.3"
+version = "0.27.0"
 requires-python = ">=3.11"
 dependencies = [
     "breathe==4.36.0",
diff --git a/cpp/docs/uv.lock b/cpp/docs/uv.lock
index 2b00520c..ac83edc5 100644
--- a/cpp/docs/uv.lock
+++ b/cpp/docs/uv.lock
@@ -139,7 +139,7 @@ wheels = [
 
 [[package]]
 name = "libloot-cpp-docs"
-version = "0.26.2"
+version = "0.27.0"
 source = { virtual = "." }
 dependencies = [
     { name = "breathe" },
diff --git a/cpp/include/loot/loot_version.h b/cpp/include/loot/loot_version.h
index e2794ab4..e6080a77 100644
--- a/cpp/include/loot/loot_version.h
+++ b/cpp/include/loot/loot_version.h
@@ -34,10 +34,10 @@ namespace loot {
 inline constexpr unsigned int LIBLOOT_VERSION_MAJOR = 0;
 
 /** @brief libloot's minor version number. */
-inline constexpr unsigned int LIBLOOT_VERSION_MINOR = 26;
+inline constexpr unsigned int LIBLOOT_VERSION_MINOR = 27;
 
 /** @brief libloot's patch version number. */
-inline constexpr unsigned int LIBLOOT_VERSION_PATCH = 3;
+inline constexpr unsigned int LIBLOOT_VERSION_PATCH = 0;
 
 /**
  * @brief Get the library version.
diff --git a/cpp/src/api/resource.rc b/cpp/src/api/resource.rc
index 95db62fb..dede32d9 100644
--- a/cpp/src/api/resource.rc
+++ b/cpp/src/api/resource.rc
@@ -2,8 +2,8 @@
 #include <windows.h>
 
 1 VERSIONINFO
-FILEVERSION 0, 26, 3, 0
-PRODUCTVERSION 0, 26, 3, 0
+FILEVERSION 0, 27, 0, 0
+PRODUCTVERSION 0, 27, 0, 0
 FILEOS VOS__WINDOWS32
 FILETYPE VFT_DLL
 BEGIN
@@ -13,12 +13,12 @@ BLOCK "040904b0"
 BEGIN
 VALUE "CompanyName", "LOOT"
 VALUE "FileDescription", "Library providing LOOT's core functionality"
-VALUE "FileVersion", "0.26.3"
+VALUE "FileVersion", "0.27.0"
 VALUE "InternalName", "loot"
 VALUE "LegalCopyright", "Copyright (C) 2013-2022 Oliver Hamlet"
 VALUE "OriginalFilename", "loot.dll"
 VALUE "ProductName", "LOOT"
-VALUE "ProductVersion", "0.26.3"
+VALUE "ProductVersion", "0.27.0"
 END
 END
 BLOCK "VarFileInfo"
diff --git a/ffi-errors/Cargo.toml b/ffi-errors/Cargo.toml
index 8d1d5ed8..171e3bd2 100644
--- a/ffi-errors/Cargo.toml
+++ b/ffi-errors/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "libloot-ffi-errors"
-version = "0.26.3"
+version = "0.27.0"
 edition = "2024"
 license = "GPL-3.0-or-later"
 
diff --git a/nodejs/Cargo.toml b/nodejs/Cargo.toml
index 53df7751..2ea2ef48 100644
--- a/nodejs/Cargo.toml
+++ b/nodejs/Cargo.toml
@@ -1,7 +1,7 @@
 [package]
 edition = "2021"
 name = "libloot-nodejs"
-version = "0.26.3"
+version = "0.27.0"
 license = "GPL-3.0-or-later"
 
 [lib]
diff --git a/nodejs/__test__/index.spec.mjs b/nodejs/__test__/index.spec.mjs
index 7395e466..b5cb6752 100644
--- a/nodejs/__test__/index.spec.mjs
+++ b/nodejs/__test__/index.spec.mjs
@@ -7,7 +7,7 @@ test('liblootVersion', t => {
 });
 
 test('isCompatible', t => {
-  t.is(isCompatible(0, 26, 0), true)
+  t.is(isCompatible(0, 27, 0), true)
 });
 
 test('Group equality', t => {
diff --git a/nodejs/npm/linux-x64-gnu/package.json b/nodejs/npm/linux-x64-gnu/package.json
index 5932ae11..ade45a77 100644
--- a/nodejs/npm/linux-x64-gnu/package.json
+++ b/nodejs/npm/linux-x64-gnu/package.json
@@ -1,6 +1,6 @@
 {
   "name": "libloot-nodejs-linux-x64-gnu",
-  "version": "0.26.3",
+  "version": "0.27.0",
   "os": [
     "linux"
   ],
diff --git a/nodejs/npm/win32-x64-msvc/package.json b/nodejs/npm/win32-x64-msvc/package.json
index 01560557..bd122b09 100644
--- a/nodejs/npm/win32-x64-msvc/package.json
+++ b/nodejs/npm/win32-x64-msvc/package.json
@@ -1,6 +1,6 @@
 {
   "name": "libloot-nodejs-win32-x64-msvc",
-  "version": "0.26.3",
+  "version": "0.27.0",
   "os": [
     "win32"
   ],
diff --git a/nodejs/package.json b/nodejs/package.json
index 8b14605c..94fcc7ea 100644
--- a/nodejs/package.json
+++ b/nodejs/package.json
@@ -1,6 +1,6 @@
 {
   "name": "libloot-nodejs",
-  "version": "0.26.3",
+  "version": "0.27.0",
   "main": "index.js",
   "types": "index.d.ts",
   "napi": {
diff --git a/parameterized-test/Cargo.toml b/parameterized-test/Cargo.toml
index 615b966a..7f379260 100644
--- a/parameterized-test/Cargo.toml
+++ b/parameterized-test/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "parameterized-test"
-version = "0.26.3"
+version = "0.27.0"
 edition = "2024"
 license = "MIT"
 
diff --git a/python/Cargo.toml b/python/Cargo.toml
index f93f7ed5..699a8739 100644
--- a/python/Cargo.toml
+++ b/python/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "libloot-python"
-version = "0.26.3"
+version = "0.27.0"
 edition = "2024"
 license = "GPL-3.0-or-later"