diff --git a/.tool-versions b/.tool-versions
index 4aed807..7c32935 100644
--- a/.tool-versions
+++ b/.tool-versions
@@ -1,2 +1,2 @@
-python 3.10.13
-poetry 1.4.2
+python 3.11.5
+poetry 1.6.1
diff --git a/Dockerfile b/Dockerfile
index 66ce42e..7f53a40 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM python:3.10-slim-bullseye as python-build-stage
+FROM python:3.11-slim-bullseye as python-build-stage
 WORKDIR /src
 
 RUN apt-get update && apt-get upgrade -y \
@@ -11,7 +11,7 @@ RUN pip install --isolated --no-cache-dir --no-input poetry \
     && poetry config virtualenvs.create false \
     && poetry install --no-interaction --without=dev
 
-FROM public.ecr.aws/lambda/python:3.9 as python-run-stage
+FROM public.ecr.aws/lambda/python:3.11 as python-run-stage
 
 COPY --from=python-build-stage /usr/local/lib/python3.10/site-packages /usr/local/lib/python3.10/site-packages
 ENV PYTHONPATH=/usr/local/lib/python3.10/site-packages
diff --git a/poetry.lock b/poetry.lock
index 4c546c1..696aa0e 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -193,8 +193,6 @@ mypy-extensions = ">=0.4.3"
 packaging = ">=22.0"
 pathspec = ">=0.9.0"
 platformdirs = ">=2"
-tomli = {version = ">=1.1.0", markers = "python_version < \"3.11\""}
-typing-extensions = {version = ">=4.0.1", markers = "python_version < \"3.11\""}
 
 [package.extras]
 colorama = ["colorama (>=0.4.3)"]
@@ -314,21 +312,6 @@ files = [
     {file = "colorama-0.4.6.tar.gz", hash = "sha256:08695f5cb7ed6e0531a20572697297273c47b8cae5a63ffc6d6ed5c201be6e44"},
 ]
 
-[[package]]
-name = "exceptiongroup"
-version = "1.1.3"
-description = "Backport of PEP 654 (exception groups)"
-category = "dev"
-optional = false
-python-versions = ">=3.7"
-files = [
-    {file = "exceptiongroup-1.1.3-py3-none-any.whl", hash = "sha256:343280667a4585d195ca1cf9cef84a4e178c4b6cf2274caef9859782b567d5e3"},
-    {file = "exceptiongroup-1.1.3.tar.gz", hash = "sha256:097acd85d473d75af5bb98e41b61ff7fe35efe6675e4f9370ec6ec5126d160e9"},
-]
-
-[package.extras]
-test = ["pytest (>=6)"]
-
 [[package]]
 name = "flake8"
 version = "6.1.0"
@@ -661,11 +644,9 @@ files = [
 
 [package.dependencies]
 colorama = {version = "*", markers = "sys_platform == \"win32\""}
-exceptiongroup = {version = ">=1.0.0rc8", markers = "python_version < \"3.11\""}
 iniconfig = "*"
 packaging = "*"
 pluggy = ">=0.12,<2.0"
-tomli = {version = ">=1.0.0", markers = "python_version < \"3.11\""}
 
 [package.extras]
 testing = ["argcomplete", "attrs (>=19.2.0)", "hypothesis (>=3.56)", "mock", "nose", "pygments (>=2.7.2)", "requests", "setuptools", "xmlschema"]
@@ -688,30 +669,6 @@ aiohttp = ">3.5.2,<4.0.0"
 [package.extras]
 optional = ["aiodns (>1.0)"]
 
-[[package]]
-name = "tomli"
-version = "2.0.1"
-description = "A lil' TOML parser"
-category = "main"
-optional = false
-python-versions = ">=3.7"
-files = [
-    {file = "tomli-2.0.1-py3-none-any.whl", hash = "sha256:939de3e7a6161af0c887ef91b7d41a53e7c5a1ca976325f429cb46ea9bc30ecc"},
-    {file = "tomli-2.0.1.tar.gz", hash = "sha256:de526c12914f0c550d15924c62d72abc48d6fe7364aa87328337a31007fe8a4f"},
-]
-
-[[package]]
-name = "typing-extensions"
-version = "4.8.0"
-description = "Backported and Experimental Type Hints for Python 3.8+"
-category = "main"
-optional = false
-python-versions = ">=3.8"
-files = [
-    {file = "typing_extensions-4.8.0-py3-none-any.whl", hash = "sha256:8f92fc8806f9a6b641eaa5318da32b44d401efaac0f6678c9bc448ba3605faa0"},
-    {file = "typing_extensions-4.8.0.tar.gz", hash = "sha256:df8e4339e9cb77357558cbdbceca33c303714cf861d1eef15e1070055ae8b7ef"},
-]
-
 [[package]]
 name = "yarl"
 version = "1.9.2"
@@ -802,5 +759,5 @@ multidict = ">=4.0"
 
 [metadata]
 lock-version = "2.0"
-python-versions = "~3.10"
-content-hash = "6c4a6ad6bf015e888739cb2548d8012d19186c231df1c977386cbf445d99377f"
+python-versions = "~3.11.0"
+content-hash = "e34c936416ad79e76166ebaac8260a19e7f7b491e100b306e46dd78db11d27ec"
diff --git a/pyproject.toml b/pyproject.toml
index 6c4216a..a19a7c8 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -6,7 +6,7 @@ version = "0.1.0"
 readme = "README.md"
 
 [tool.poetry.dependencies]
-python = "~3.10"
+python = "~3.11.0"
 slackclient = "^2.9.4"
 black = "^23.3.0"