diff --git a/poetry.lock b/poetry.lock
index 58d10a3..a38d615 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -221,7 +221,7 @@ pyparsing = {version = ">=2.4.2,<3.0.0 || >3.0.0,<3.0.1 || >3.0.1,<3.0.2 || >3.0
 
 [[package]]
 name = "icalendar"
-version = "5.0.3"
+version = "5.0.4"
 description = "iCalendar parser/generator"
 category = "main"
 optional = false
@@ -550,7 +550,7 @@ socks = ["PySocks (>=1.5.6,!=1.5.7,<2.0)"]
 [metadata]
 lock-version = "1.1"
 python-versions = "^3.8"
-content-hash = "179e75f202ed1398baf589e9d8abb08af3375c7fcbeb904bbc67a072e71d598c"
+content-hash = "60680847a20ba67d69965deb3ca9d5647d1f23276bcafbe81e995311a5874460"
 
 [metadata.files]
 attrs = [
@@ -645,8 +645,8 @@ httplib2 = [
     {file = "httplib2-0.20.4.tar.gz", hash = "sha256:58a98e45b4b1a48273073f905d2961666ecf0fbac4250ea5b47aef259eb5c585"},
 ]
 icalendar = [
-    {file = "icalendar-5.0.3-py3-none-any.whl", hash = "sha256:1cdcd27307e55db25bd7f99924b7a31c6b2d123228e7dae6723974a4a1d60258"},
-    {file = "icalendar-5.0.3.tar.gz", hash = "sha256:ca60810598681cb239fc3190202e01a3305e4f0389576273892dda31249f25e4"},
+    {file = "icalendar-5.0.4-py3-none-any.whl", hash = "sha256:3e759f9c3875e037c90e1c2f4aff0f6123f4435af6152b80a70b8d6a5529cb1b"},
+    {file = "icalendar-5.0.4.tar.gz", hash = "sha256:f0aa86d6f5bc110ed3b91e96c48c70351d7a09fbed25366f673dc0b799c83975"},
 ]
 idna = [
     {file = "idna-3.3-py3-none-any.whl", hash = "sha256:84d9dd047ffa80596e0f246e2eab0b391788b0503584e8945f2368256d2735ff"},
diff --git a/pyproject.toml b/pyproject.toml
index e4942bb..88c4fcf 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -20,7 +20,7 @@ classifiers = [
 python = "^3.8"
 google-auth = "2.14.1"
 google-api-python-client = "2.68.0"
-icalendar = "5.0.3"
+icalendar = "5.0.4"
 pytz = "2022.6"
 PyYAML = "6.0"
 fire = "0.4.0"