diff --git a/pyproject.toml b/pyproject.toml
index 432d1f560..e03f96ffc 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -15,7 +15,7 @@ dependencies = [
   "google-cloud-bigquery==3.39.0",
   "gspread==6.2.1",
   "humanize>=0.5.1",
-  "icalendar==6.3.2",
+  "icalendar==7.1.1",
   "Jinja2==3.1.6",
   "libmozdata==0.2.12",
   "numpy==2.2.6",
diff --git a/uv.lock b/uv.lock
index 08f70081b..5a28d7cfc 100644
--- a/uv.lock
+++ b/uv.lock
@@ -89,7 +89,7 @@ requires-dist = [
     { name = "google-cloud-bigquery", specifier = "==3.39.0" },
     { name = "gspread", specifier = "==6.2.1" },
     { name = "humanize", specifier = ">=0.5.1" },
-    { name = "icalendar", specifier = "==6.3.2" },
+    { name = "icalendar", specifier = "==7.1.1" },
     { name = "jinja2", specifier = "==3.1.6" },
     { name = "libmozdata", specifier = "==0.2.12" },
     { name = "numpy", specifier = "==2.2.6" },
@@ -522,15 +522,16 @@ wheels = [
 
 [[package]]
 name = "icalendar"
-version = "6.3.2"
+version = "7.1.1"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
     { name = "python-dateutil" },
+    { name = "typing-extensions" },
     { name = "tzdata" },
 ]
-sdist = { url = "https://files.pythonhosted.org/packages/5d/70/458092b3e7c15783423fe64d07e63ea3311a597e723be6a1060513e3db93/icalendar-6.3.2.tar.gz", hash = "sha256:e0c10ecbfcebe958d33af7d491f6e6b7580d11d475f2eeb29532d0424f9110a1", size = 178422, upload-time = "2025-11-05T12:49:32.286Z" }
+sdist = { url = "https://files.pythonhosted.org/packages/10/1b/f02e4d997f50d8274c877bbf4f7809e6b04216c4d0b859e6ac7f8566165a/icalendar-7.1.1.tar.gz", hash = "sha256:df80df31f57d345b68b2d07be579a24e8103f7b6555c548e8ef8246cb2353186", size = 469560, upload-time = "2026-05-18T11:11:25.188Z" }
 wheels = [
-    { url = "https://files.pythonhosted.org/packages/06/ee/2ff96bb5bd88fe03ab90aedf5180f96dc0f3ae4648ca264b473055bcaaff/icalendar-6.3.2-py3-none-any.whl", hash = "sha256:d400e9c9bb8c025e5a3c77c236941bb690494be52528a0b43cc7e8b7c9505064", size = 242403, upload-time = "2025-11-05T12:49:30.691Z" },
+    { url = "https://files.pythonhosted.org/packages/d0/86/33636ea5600a30f4674650f460903ca817d4aa0f3a5c655db1b5511fd6d6/icalendar-7.1.1-py3-none-any.whl", hash = "sha256:5e581b8376df7c66972edcf1597c99efc07011829f73df420c2648784c424b42", size = 472071, upload-time = "2026-05-18T11:11:23.904Z" },
 ]
 
 [[package]]
@@ -1310,11 +1311,11 @@ wheels = [
 
 [[package]]
 name = "tzdata"
-version = "2025.2"
+version = "2026.2"
 source = { registry = "https://pypi.org/simple" }
-sdist = { url = "https://files.pythonhosted.org/packages/95/32/1a225d6164441be760d75c2c42e2780dc0873fe382da3e98a2e1e48361e5/tzdata-2025.2.tar.gz", hash = "sha256:b60a638fcc0daffadf82fe0f57e53d06bdec2f36c4df66280ae79bce6bd6f2b9", size = 196380, upload-time = "2025-03-23T13:54:43.652Z" }
+sdist = { url = "https://files.pythonhosted.org/packages/ba/19/1b9b0e29f30c6d35cb345486df41110984ea67ae69dddbc0e8a100999493/tzdata-2026.2.tar.gz", hash = "sha256:9173fde7d80d9018e02a662e168e5a2d04f87c41ea174b139fbef642eda62d10", size = 198254, upload-time = "2026-04-24T15:22:08.651Z" }
 wheels = [
-    { url = "https://files.pythonhosted.org/packages/5c/23/c7abc0ca0a1526a0774eca151daeb8de62ec457e77262b66b359c3c7679e/tzdata-2025.2-py2.py3-none-any.whl", hash = "sha256:1a403fada01ff9221ca8044d701868fa132215d84beb92242d9acd2147f667a8", size = 347839, upload-time = "2025-03-23T13:54:41.845Z" },
+    { url = "https://files.pythonhosted.org/packages/ce/e4/dccd7f47c4b64213ac01ef921a1337ee6e30e8c6466046018326977efd95/tzdata-2026.2-py2.py3-none-any.whl", hash = "sha256:bbe9af844f658da81a5f95019480da3a89415801f6cc966806612cc7169bffe7", size = 349321, upload-time = "2026-04-24T15:22:05.876Z" },
 ]
 
 [[package]]