diff --git a/conf/requirements.txt b/conf/requirements.txt
index c3900ae..8c4aff5 100644
--- a/conf/requirements.txt
+++ b/conf/requirements.txt
@@ -46,9 +46,9 @@ psycopg2==2.9.3; python_version >= "3.7" and python_full_version < "4.0.0" \
 pyparsing==3.0.9; python_version >= "3.7" and python_full_version < "4.0.0" and python_full_version >= "3.6.8" \
     --hash=sha256:5026bae9a10eeaefb61dab2f09052b9f4307d44aee4eda64b309723d8d206bbc \
     --hash=sha256:2b020ecf7d21b687f219b71ecad3631f644a47f01403fa1d1036b0c6416d70fb
-pytz==2022.2; python_version >= "3.7" and python_full_version < "4.0.0" \
-    --hash=sha256:d9b245e63af49c4e51afdec5402f56b99c0cb483a84a12bb8b7db980386baade \
-    --hash=sha256:bc824559e43e8ab983426a49525079d186b25372ff63aa3430ccd527d95edc3a
+pytz==2022.2.1; python_version >= "3.7" and python_full_version < "4.0.0" \
+    --hash=sha256:220f481bdafa09c3955dfbdddb7b57780e9a94f5127e35456a48589b9e0c0197 \
+    --hash=sha256:cea221417204f2d1a2aa03ddae3e867921971d0d76f14d87abb4414415bbdcf5
 redis==4.3.4; python_version >= "3.7" and python_full_version < "4.0.0" \
     --hash=sha256:a52d5694c9eb4292770084fa8c863f79367ca19884b329ab574d5cb2036b3e54 \
     --hash=sha256:ddf27071df4adf3821c4f2ca59d67525c3a82e5f268bed97b813cb4fabf87880
diff --git a/poetry.lock b/poetry.lock
index 68fbbe7..9ab0cd4 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -12,14 +12,6 @@ typing-extensions = {version = "*", markers = "python_version < \"3.8\""}
 [package.extras]
 tests = ["mypy (>=0.800)", "pytest-asyncio", "pytest"]
 
-[[package]]
-name = "astor"
-version = "0.8.1"
-description = "Read/rewrite/write Python ASTs"
-category = "dev"
-optional = false
-python-versions = "!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,>=2.7"
-
 [[package]]
 name = "async-timeout"
 version = "4.0.2"
@@ -311,18 +303,6 @@ mccabe = ">=0.7.0,<0.8.0"
 pycodestyle = ">=2.9.0,<2.10.0"
 pyflakes = ">=2.5.0,<2.6.0"
 
-[[package]]
-name = "flynt"
-version = "0.76"
-description = "CLI tool to convert a python project's %-formatted strings to f-strings."
-category = "dev"
-optional = false
-python-versions = ">=3.6"
-
-[package.dependencies]
-astor = "*"
-tomli = ">=1.1.0"
-
 [[package]]
 name = "gunicorn"
 version = "20.1.0"
@@ -570,7 +550,7 @@ soap = ["zeep"]
 
 [[package]]
 name = "pytz"
-version = "2022.2"
+version = "2022.2.1"
 description = "World timezone definitions, modern and historical"
 category = "main"
 optional = false
@@ -738,17 +718,13 @@ docs = ["jaraco.tidelift (>=1.4)", "rst.linker (>=1.9)", "jaraco.packaging (>=9)
 [metadata]
 lock-version = "1.1"
 python-versions = ">=3.7,<4.0.0"  # TODO: Update to >=3.8 after YunoHost updates to Bullseye
-content-hash = "4b3df1b657cee83d4ccd8f3adebce12a63a4a116304ba73e78c0a34f696fe595"
+content-hash = "477d486f59495a9e626d97f184b0c05db2642a62627f98758cdb90221cea1ebf"
 
 [metadata.files]
 asgiref = [
     {file = "asgiref-3.5.2-py3-none-any.whl", hash = "sha256:1d2880b792ae8757289136f1db2b7b99100ce959b2aa57fd69dab783d05afac4"},
     {file = "asgiref-3.5.2.tar.gz", hash = "sha256:4a29362a6acebe09bf1d6640db38c1dc3d9217c68e6f9f6204d72667fc19a424"},
 ]
-astor = [
-    {file = "astor-0.8.1-py2.py3-none-any.whl", hash = "sha256:070a54e890cefb5b3739d19f30f5a5ec840ffc9c50ffa7d23cc9fc1a38ebbfc5"},
-    {file = "astor-0.8.1.tar.gz", hash = "sha256:6a6effda93f4e1ce9f618779b2dd1d9d84f1e32812c23a29b3fff6fd7f63fa5e"},
-]
 async-timeout = [
     {file = "async-timeout-4.0.2.tar.gz", hash = "sha256:2163e1640ddb52b7a8c80d0a67a08587e5d245cc9c553a74a847056bc2976b15"},
     {file = "async_timeout-4.0.2-py3-none-any.whl", hash = "sha256:8ca1e4fcf50d07413d66d1a5e416e42cfdf5851c981d679a09851a6853383b3c"},
@@ -899,10 +875,6 @@ flake8 = [
     {file = "flake8-5.0.4-py2.py3-none-any.whl", hash = "sha256:7a1cf6b73744f5806ab95e526f6f0d8c01c66d7bbe349562d22dfca20610b248"},
     {file = "flake8-5.0.4.tar.gz", hash = "sha256:6fbe320aad8d6b95cec8b8e47bc933004678dc63095be98528b7bdd2a9f510db"},
 ]
-flynt = [
-    {file = "flynt-0.76-py3-none-any.whl", hash = "sha256:fc122c5f589b0c4d019d7d33597f4925fd886a8e6fb3cbadb918e4baa3661687"},
-    {file = "flynt-0.76.tar.gz", hash = "sha256:7a99c5a550ea9e8c21203f6999ed8ce69cbad7bc8465268469777cf06413193a"},
-]
 gunicorn = [
     {file = "gunicorn-20.1.0-py3-none-any.whl", hash = "sha256:9dcc4547dbb1cb284accfb15ab5667a0e5d1881cc443e0677b4882a4067a807e"},
     {file = "gunicorn-20.1.0.tar.gz", hash = "sha256:e0a968b5ba15f8a328fdfd7ab1fcb5af4470c28aaf7e55df02a99bc13138e6e8"},
@@ -997,8 +969,8 @@ python-stdnum = [
     {file = "python_stdnum-1.17-py2.py3-none-any.whl", hash = "sha256:a46e6cf9652807314d369b654b255c86a59f93d18be2834f3d567ed1a346c547"},
 ]
 pytz = [
-    {file = "pytz-2022.2-py2.py3-none-any.whl", hash = "sha256:d9b245e63af49c4e51afdec5402f56b99c0cb483a84a12bb8b7db980386baade"},
-    {file = "pytz-2022.2.tar.gz", hash = "sha256:bc824559e43e8ab983426a49525079d186b25372ff63aa3430ccd527d95edc3a"},
+    {file = "pytz-2022.2.1-py2.py3-none-any.whl", hash = "sha256:220f481bdafa09c3955dfbdddb7b57780e9a94f5127e35456a48589b9e0c0197"},
+    {file = "pytz-2022.2.1.tar.gz", hash = "sha256:cea221417204f2d1a2aa03ddae3e867921971d0d76f14d87abb4414415bbdcf5"},
 ]
 redis = [
     {file = "redis-4.3.4-py3-none-any.whl", hash = "sha256:a52d5694c9eb4292770084fa8c863f79367ca19884b329ab574d5cb2036b3e54"},
diff --git a/pyproject.toml b/pyproject.toml
index b9237b0..0d4284b 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -24,7 +24,6 @@ pytest-darker = "*"  # https://github.com/akaihola/pytest-darker
 coveralls = "*"
 isort = "*"
 flake8 = "*"
-flynt = "*"
 
 [build-system]
 requires = ["poetry-core>=1.0.0"]