diff --git a/homeassistant/components/google/manifest.json b/homeassistant/components/google/manifest.json
index a08daee8961..ec9fb7018d6 100644
--- a/homeassistant/components/google/manifest.json
+++ b/homeassistant/components/google/manifest.json
@@ -7,5 +7,5 @@
   "documentation": "https://www.home-assistant.io/integrations/calendar.google",
   "iot_class": "cloud_polling",
   "loggers": ["googleapiclient"],
-  "requirements": ["gcal-sync==6.0.3", "oauth2client==4.1.3", "ical==7.0.1"]
+  "requirements": ["gcal-sync==6.0.3", "oauth2client==4.1.3", "ical==7.0.3"]
 }
diff --git a/homeassistant/components/local_calendar/manifest.json b/homeassistant/components/local_calendar/manifest.json
index 25ec9f2ccc6..1c13970503d 100644
--- a/homeassistant/components/local_calendar/manifest.json
+++ b/homeassistant/components/local_calendar/manifest.json
@@ -6,5 +6,5 @@
   "documentation": "https://www.home-assistant.io/integrations/local_calendar",
   "iot_class": "local_polling",
   "loggers": ["ical"],
-  "requirements": ["ical==7.0.1"]
+  "requirements": ["ical==7.0.3"]
 }
diff --git a/homeassistant/components/local_todo/manifest.json b/homeassistant/components/local_todo/manifest.json
index 81f0f9dc199..3bcb8af9f43 100644
--- a/homeassistant/components/local_todo/manifest.json
+++ b/homeassistant/components/local_todo/manifest.json
@@ -5,5 +5,5 @@
   "config_flow": true,
   "documentation": "https://www.home-assistant.io/integrations/local_todo",
   "iot_class": "local_polling",
-  "requirements": ["ical==7.0.1"]
+  "requirements": ["ical==7.0.3"]
 }
diff --git a/requirements_all.txt b/requirements_all.txt
index f93cd2ea95f..f166683b2b7 100644
--- a/requirements_all.txt
+++ b/requirements_all.txt
@@ -1115,7 +1115,7 @@ ibmiotf==0.3.4
 # homeassistant.components.google
 # homeassistant.components.local_calendar
 # homeassistant.components.local_todo
-ical==7.0.1
+ical==7.0.3
 
 # homeassistant.components.ping
 icmplib==3.0
diff --git a/requirements_test_all.txt b/requirements_test_all.txt
index 037cbe18bda..fc29b120069 100644
--- a/requirements_test_all.txt
+++ b/requirements_test_all.txt
@@ -905,7 +905,7 @@ ibeacon-ble==1.2.0
 # homeassistant.components.google
 # homeassistant.components.local_calendar
 # homeassistant.components.local_todo
-ical==7.0.1
+ical==7.0.3
 
 # homeassistant.components.ping
 icmplib==3.0
diff --git a/tests/components/local_todo/snapshots/test_todo.ambr b/tests/components/local_todo/snapshots/test_todo.ambr
index db4403f301c..15a44ff8c27 100644
--- a/tests/components/local_todo/snapshots/test_todo.ambr
+++ b/tests/components/local_todo/snapshots/test_todo.ambr
@@ -22,6 +22,16 @@
   list([
   ])
 # ---
+# name: test_parse_existing_ics[invalid_dtstart_tzname]
+  list([
+    dict({
+      'due': '2023-10-24T11:30:00',
+      'status': 'needs_action',
+      'summary': 'Task',
+      'uid': '077cb7f2-6c89-11ee-b2a9-0242ac110002',
+    }),
+  ])
+# ---
 # name: test_parse_existing_ics[migrate_legacy_due]
   list([
     dict({
diff --git a/tests/components/local_todo/test_todo.py b/tests/components/local_todo/test_todo.py
index 231f56b0afb..760b0260dbb 100644
--- a/tests/components/local_todo/test_todo.py
+++ b/tests/components/local_todo/test_todo.py
@@ -671,6 +671,28 @@ async def test_move_item_previous_unknown(
             ),
             "1",
         ),
+        (
+            textwrap.dedent(
+                """\
+                    BEGIN:VCALENDAR
+                    PRODID:-//homeassistant.io//local_todo 2.0//EN
+                    VERSION:2.0
+                    BEGIN:VTODO
+                    DTSTAMP:20231024T014011
+                    UID:077cb7f2-6c89-11ee-b2a9-0242ac110002
+                    CREATED:20231017T010348
+                    LAST-MODIFIED:20231024T014011
+                    SEQUENCE:1
+                    STATUS:NEEDS-ACTION
+                    SUMMARY:Task
+                    DUE:20231024T113000
+                    DTSTART;TZID=CST:20231024T113000
+                    END:VTODO
+                    END:VCALENDAR
+                """
+            ),
+            "1",
+        ),
     ],
     ids=(
         "empty",
@@ -679,6 +701,7 @@ async def test_move_item_previous_unknown(
         "needs_action",
         "migrate_legacy_due",
         "due",
+        "invalid_dtstart_tzname",
     ),
 )
 async def test_parse_existing_ics(