diff --git a/poetry.lock b/poetry.lock
index a749c927..94dd6162 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -708,6 +708,17 @@ category = "main"
 optional = false
 python-versions = "*"
 
+[[package]]
+name = "pytz-deprecation-shim"
+version = "0.1.0.post0"
+description = "Shims to make deprecation of pytz easier"
+category = "main"
+optional = false
+python-versions = "!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,!=3.4.*,!=3.5.*,>=2.7"
+
+[package.dependencies]
+tzdata = {version = "*", markers = "python_version >= \"3.6\""}
+
 [[package]]
 name = "pywin32-ctypes"
 version = "0.2.0"
@@ -860,16 +871,29 @@ category = "dev"
 optional = false
 python-versions = ">=3.6"
 
+[[package]]
+name = "tzdata"
+version = "2022.1"
+description = "Provider of IANA time zone data"
+category = "main"
+optional = false
+python-versions = ">=2"
+
 [[package]]
 name = "tzlocal"
-version = "2.1"
+version = "4.1"
 description = "tzinfo object for the local timezone"
 category = "main"
 optional = false
-python-versions = "*"
+python-versions = ">=3.6"
 
 [package.dependencies]
-pytz = "*"
+pytz-deprecation-shim = "*"
+tzdata = {version = "*", markers = "platform_system == \"Windows\""}
+
+[package.extras]
+devenv = ["black", "pyroma", "pytest-cov", "zest.releaser"]
+test = ["pytest-mock (>=3.3)", "pytest (>=4.3)"]
 
 [[package]]
 name = "watchdog"
@@ -933,7 +957,7 @@ testing = ["pytest", "pytest-bdd", "toml"]
 [metadata]
 lock-version = "1.1"
 python-versions = ">=3.9.0, <3.12"
-content-hash = "8a4b09a72f705e5265d6d1bebc61926df2ff1e0237ac1369bef6dbebb44f4d9c"
+content-hash = "f913eeac2478f392a83c77e5357b94f794ba6e80d572256ceb2f1ef1c7e679b8"
 
 [metadata.files]
 ansiwrap = [
@@ -1297,6 +1321,10 @@ pytz = [
     {file = "pytz-2022.1-py2.py3-none-any.whl", hash = "sha256:e68985985296d9a66a881eb3193b0906246245294a881e7c8afe623866ac6a5c"},
     {file = "pytz-2022.1.tar.gz", hash = "sha256:1e760e2fe6a8163bc0b3d9a19c4f84342afa0a2affebfaa84b01b978a02ecaa7"},
 ]
+pytz-deprecation-shim = [
+    {file = "pytz_deprecation_shim-0.1.0.post0-py2.py3-none-any.whl", hash = "sha256:8314c9692a636c8eb3bda879b9f119e350e93223ae83e70e80c31675a0fdc1a6"},
+    {file = "pytz_deprecation_shim-0.1.0.post0.tar.gz", hash = "sha256:af097bae1b616dde5c5744441e2ddc69e74dfdcb0c263129610d85b87445a59d"},
+]
 pywin32-ctypes = [
     {file = "pywin32-ctypes-0.2.0.tar.gz", hash = "sha256:24ffc3b341d457d48e8922352130cf2644024a4ff09762a2261fd34c36ee5942"},
     {file = "pywin32_ctypes-0.2.0-py2.py3-none-any.whl", hash = "sha256:9dc2d991b3479cc2df15930958b674a48a227d5361d413827a4cfd0b5876fc98"},
@@ -1411,9 +1439,13 @@ typing-extensions = [
     {file = "typing_extensions-4.1.1-py3-none-any.whl", hash = "sha256:21c85e0fe4b9a155d0799430b0ad741cdce7e359660ccbd8b530613e8df88ce2"},
     {file = "typing_extensions-4.1.1.tar.gz", hash = "sha256:1a9462dcc3347a79b1f1c0271fbe79e844580bb598bafa1ed208b94da3cdcd42"},
 ]
+tzdata = [
+    {file = "tzdata-2022.1-py2.py3-none-any.whl", hash = "sha256:238e70234214138ed7b4e8a0fab0e5e13872edab3be586ab8198c407620e2ab9"},
+    {file = "tzdata-2022.1.tar.gz", hash = "sha256:8b536a8ec63dc0751342b3984193a3118f8fca2afe25752bb9b7fffd398552d3"},
+]
 tzlocal = [
-    {file = "tzlocal-2.1-py2.py3-none-any.whl", hash = "sha256:e2cb6c6b5b604af38597403e9852872d7f534962ae2954c7f35efcb1ccacf4a4"},
-    {file = "tzlocal-2.1.tar.gz", hash = "sha256:643c97c5294aedc737780a49d9df30889321cbe1204eac2c2ec6134035a92e44"},
+    {file = "tzlocal-4.1-py3-none-any.whl", hash = "sha256:28ba8d9fcb6c9a782d6e0078b4f6627af1ea26aeaa32b4eab5324abc7df4149f"},
+    {file = "tzlocal-4.1.tar.gz", hash = "sha256:0f28015ac68a5c067210400a9197fc5d36ba9bc3f8eaf1da3cbd59acdfed9e09"},
 ]
 watchdog = [
     {file = "watchdog-2.1.6-cp310-cp310-macosx_10_9_universal2.whl", hash = "sha256:9693f35162dc6208d10b10ddf0458cc09ad70c30ba689d9206e02cd836ce28a3"},
diff --git a/pyproject.toml b/pyproject.toml
index 88861740..3d97e11b 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -40,7 +40,7 @@ pyxdg = ">=0.27.0"
 
 # dayone-only deps
 pytz = ">=2020"          # https://pythonhosted.org/pytz/#issues-limitations
-tzlocal = ">2.0, <3.0"   # https://github.com/regebro/tzlocal/blob/master/CHANGES.txt
+tzlocal = ">2.0,<5.0"   # https://github.com/regebro/tzlocal/blob/master/CHANGES.txt
 
 # Minimal deps required for testing
 # I don't like repeating deps here, but