diff --git a/poetry.lock b/poetry.lock
index c0bc773..84db1d7 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -224,13 +224,13 @@ uritemplate = ">=3.0.1,<5"
 
 [[package]]
 name = "google-auth"
-version = "2.19.0"
+version = "2.21.0"
 description = "Google Authentication Library"
 optional = false
 python-versions = ">=3.6"
 files = [
-    {file = "google-auth-2.19.0.tar.gz", hash = "sha256:f39d528077ac540793dd3c22a8706178f157642a67d874db25c640b7fead277e"},
-    {file = "google_auth-2.19.0-py2.py3-none-any.whl", hash = "sha256:be617bfaf77774008e9d177573f782e109188c8a64ae6e744285df5cea3e7df6"},
+    {file = "google-auth-2.21.0.tar.gz", hash = "sha256:b28e8048e57727e7cf0e5bd8e7276b212aef476654a09511354aa82753b45c66"},
+    {file = "google_auth-2.21.0-py2.py3-none-any.whl", hash = "sha256:da3f18d074fa0f5a7061d99b9af8cee3aa6189c987af7c1b07d94566b6b11268"},
 ]
 
 [package.dependencies]
@@ -241,11 +241,11 @@ six = ">=1.9.0"
 urllib3 = "<2.0"
 
 [package.extras]
-aiohttp = ["aiohttp (>=3.6.2,<4.0.0dev)", "requests (>=2.20.0,<3.0.0dev)"]
+aiohttp = ["aiohttp (>=3.6.2,<4.0.0.dev0)", "requests (>=2.20.0,<3.0.0.dev0)"]
 enterprise-cert = ["cryptography (==36.0.2)", "pyopenssl (==22.0.0)"]
 pyopenssl = ["cryptography (>=38.0.3)", "pyopenssl (>=20.0.0)"]
 reauth = ["pyu2f (>=0.1.5)"]
-requests = ["requests (>=2.20.0,<3.0.0dev)"]
+requests = ["requests (>=2.20.0,<3.0.0.dev0)"]
 
 [[package]]
 name = "google-auth-httplib2"
@@ -873,4 +873,4 @@ socks = ["PySocks (>=1.5.6,!=1.5.7,<2.0)"]
 [metadata]
 lock-version = "2.0"
 python-versions = "^3.8"
-content-hash = "ab677180193d3180af58d4e5ae6fbf394fc35270666ff09b9937efb4835f5f24"
+content-hash = "0d933b589bcea3cca04cd36da236375b369b22a76cf4554c07ac6d645fcb25a5"
diff --git a/pyproject.toml b/pyproject.toml
index 4b73639..63e927a 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -19,7 +19,7 @@ classifiers = [
 
 [tool.poetry.dependencies]
 python = "^3.8"
-google-auth = "2.19.0"
+google-auth = "2.21.0"
 google-api-python-client = "2.88.0"
 icalendar = "5.0.7"
 pytz = "2023.3"