diff --git a/package.json b/package.json
index 287d340..a6d09f0 100644
--- a/package.json
+++ b/package.json
@@ -31,7 +31,7 @@
     "@juggle/resize-observer": "^3.4.0",
     "@popperjs/core": "^2.11.8",
     "lodash": "^4.17.21",
-    "luxon": "^3.0.1",
+    "luxon": "^3.4.4",
     "polished": "^4.3.1",
     "popper-max-size-modifier": "^0.2.0",
     "react-is": "^18.2.0",
@@ -68,7 +68,7 @@
     "@testing-library/user-event": "^14.2.0",
     "@types/jest": "^28.1.1",
     "@types/lodash": "^4.14.182",
-    "@types/luxon": "^2.3.2",
+    "@types/luxon": "^3.4.2",
     "@types/mdx": "^2.0.2",
     "@types/react-dom": "^18.0.5",
     "@types/react-is": "^17.0.3",
diff --git a/src/helpers/calendarHelpers.ts b/src/helpers/calendarHelpers.ts
index ca9340a..9d8c56d 100644
--- a/src/helpers/calendarHelpers.ts
+++ b/src/helpers/calendarHelpers.ts
@@ -54,19 +54,19 @@ export function getCalendarDays(month: DateTime, weekdays: ReadonlyArray<number>
   const previousMonth = month.minus({months: 1});
   const nextMonth = month.plus({months: 1});
 
+  const daysInMonth = month.daysInMonth ?? 0;
+  const daysInPreviousMonth = previousMonth.daysInMonth ?? 0;
+
   // Figure out the size of the left & right padding.
   const startOfmonth = month.startOf('month');
   const previousPad = weekdays.indexOf(startOfmonth.weekday);
-  const rows = Math.ceil((month.daysInMonth + previousPad) / 7);
+  const rows = Math.ceil((daysInMonth + previousPad) / 7);
   const totalBoxes = rows * 7;
-  const nextPad = totalBoxes - (previousPad + month.daysInMonth);
+  const nextPad = totalBoxes - (previousPad + daysInMonth);
 
   // Build the day numbers for each range.
-  const previousMonthDayNumbers = range(
-    previousMonth.daysInMonth - previousPad + 1,
-    previousMonth.daysInMonth + 1
-  );
-  const currentMonthDayNumbers = range(1, month.daysInMonth + 1);
+  const previousMonthDayNumbers = range(daysInPreviousMonth - previousPad + 1, daysInPreviousMonth + 1);
+  const currentMonthDayNumbers = range(1, daysInMonth + 1);
   const nextMonthDayNumbers = range(1, nextPad + 1);
 
   // Map the day numbers to datetimes.
diff --git a/yarn.lock b/yarn.lock
index a03c384..4394dfb 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -3652,10 +3652,10 @@
   resolved "https://registry.yarnpkg.com/@types/lodash/-/lodash-4.14.182.tgz#05301a4d5e62963227eaafe0ce04dd77c54ea5c2"
   integrity sha512-/THyiqyQAP9AfARo4pF+aCGcyiQ94tX/Is2I7HofNRqoYLgN1PBoOWu2/zTA5zMxzP5EFutMtWtGAFRKUe961Q==
 
-"@types/luxon@^2.3.2":
-  version "2.3.2"
-  resolved "https://registry.yarnpkg.com/@types/luxon/-/luxon-2.3.2.tgz#8a3f2cdd4858ce698b56cd8597d9243b8e9d3c65"
-  integrity sha512-WOehptuhKIXukSUUkRgGbj2c997Uv/iUgYgII8U7XLJqq9W2oF0kQ6frEznRQbdurioz+L/cdaIm4GutTQfgmA==
+"@types/luxon@^3.4.2":
+  version "3.4.2"
+  resolved "https://registry.yarnpkg.com/@types/luxon/-/luxon-3.4.2.tgz#e4fc7214a420173cea47739c33cdf10874694db7"
+  integrity sha512-TifLZlFudklWlMBfhubvgqTXRzLDI5pCbGa4P8a3wPyUQSW+1xQ5eDsreP9DWHX3tjq1ke96uYG/nwundroWcA==
 
 "@types/mdast@^3.0.0":
   version "3.0.10"
@@ -9600,10 +9600,10 @@ lru-cache@^6.0.0:
   dependencies:
     yallist "^4.0.0"
 
-luxon@^3.0.1:
-  version "3.0.1"
-  resolved "https://registry.yarnpkg.com/luxon/-/luxon-3.0.1.tgz#6901111d10ad06fd267ad4e4128a84bef8a77299"
-  integrity sha512-hF3kv0e5gwHQZKz4wtm4c+inDtyc7elkanAsBq+fundaCdUBNJB1dHEGUZIM6SfSBUlbVFduPwEtNjFK8wLtcw==
+luxon@^3.4.4:
+  version "3.4.4"
+  resolved "https://registry.yarnpkg.com/luxon/-/luxon-3.4.4.tgz#cf20dc27dc532ba41a169c43fdcc0063601577af"
+  integrity sha512-zobTr7akeGHnv7eBOXcRgMeCP6+uyYsczwmeRCauvpvaAltgNyTbLH/+VaEAPUeWBT+1GuNmz4wC/6jtQzbbVA==
 
 lz-string@^1.4.4:
   version "1.4.4"