diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index aaf3b10..f07f866 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -15,7 +15,7 @@ jobs:
     strategy:
       matrix:
         python-version:
-          ["3.7", "3.8", "3.9", "3.10", "pypy3.7", "pypy3.8", "pypy3.9"]
+          ["3.7", "3.8", "3.9", "3.10", "3.11", "pypy3.7", "pypy3.8", "pypy3.9"]
         os: ["macos-latest", "windows-latest", "ubuntu-latest"]
     steps:
       - uses: actions/checkout@v3
diff --git a/CHANGELOG.md b/CHANGELOG.md
index d779ef1..0c51967 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -22,6 +22,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - `Delay.mod_x`, `Delay.mod_y`, `Delay.fat_mode` and `Delay.ping_pong` [#88].
 - Improve enum performance by using `f-enum` library (`pyflp.parse` is 50% faster).
 - `Time.gate`, `Time.shift` and `Time.full_porta` [#89].
+- *Experimental* Python 3.11 support is back.
 
 ### Changed
 
diff --git a/pyflp/__init__.py b/pyflp/__init__.py
index dfa0153..2f413ae 100644
--- a/pyflp/__init__.py
+++ b/pyflp/__init__.py
@@ -32,9 +32,9 @@
 import io
 import os
 import pathlib
+import sys
 
 import construct as c
-import fastenum
 
 from ._events import (
     DATA,
@@ -60,7 +60,10 @@
 __all__ = ["parse", "save"]
 __version__ = "2.0.0a4"
 
-fastenum.enable()
+if sys.version_info < (3, 11):  # https://github.com/Bobronium/fastenum/issues/2
+    import fastenum
+
+    fastenum.enable()  # 50% faster parse()
 
 
 def parse(file: pathlib.Path | str) -> Project:
diff --git a/pyproject.toml b/pyproject.toml
index a203189..88563d9 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -18,6 +18,7 @@ classifiers = [
   "Programming Language :: Python :: 3.8",
   "Programming Language :: Python :: 3.9",
   "Programming Language :: Python :: 3.10",
+  "Programming Language :: Python :: 3.11",
   "Programming Language :: Python :: Implementation :: CPython",
   "Programming Language :: Python :: Implementation :: PyPy",
   "Topic :: Multimedia",
@@ -27,7 +28,7 @@ classifiers = [
 license = { text = "GPL-3.0" }
 dependencies = [
   "colour>=0.1.5",
-  "f-enum>=0.2.0",
+  "f-enum>=0.2.0;python_version<='3.10'",
   "construct-typing @ git+https://github.com/timrid/construct-typing.git@ce871936d9e885c84f2f507c723fc5a7e99c9096",
   "sortedcontainers>=2.4.0",
   "typing_extensions>=4.4.0",
diff --git a/requirements.txt b/requirements.txt
index 40bb15f..7cbc1be 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,5 +1,5 @@
 colour==0.1.5
 construct-typing @ git+https://github.com/timrid/construct-typing.git@ce871936d9e885c84f2f507c723fc5a7e99c9096
-f-enum==0.2.0
+f-enum==0.2.0;python_version<="3.10"
 sortedcontainers==2.4.0
 typing_extensions==4.4.0
diff --git a/tox.ini b/tox.ini
index 2263ca8..0fa3895 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,5 +1,5 @@
 [tox]
-envlist = py{37,38,39,310},pypy{37,38,39},docs,linters
+envlist = py{37,38,39,310,311},pypy{37,38,39},docs,linters
 minversion = 3.3.0
 isolated_build = true
 parallel = auto
@@ -79,6 +79,7 @@ python =
   3.8: py38
   3.9: py39
   3.10: py310, docs
+  3.11: py311
   pypy-3.7: pypy37
   pypy-3.8: pypy38
   pypy-3.9: pypy39