diff --git a/CHANGELOG.md b/CHANGELOG.md
index b2f8eb5..edbb586 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,10 @@
 # Changelog
 
+## 3.1.9 - 03 Apr 2023
+
+    Fixed transitType which wasn't being imported when a boardingPass was getting read (PR#138)
+    Improved types for property in Field type (PR#139)
+
 ## 3.1.8 - 26 Mar 2023
 
     Fixed Typescript type for Semantics.WifiAccess (PR#136)
diff --git a/package-lock.json b/package-lock.json
index 38982b9..7d73e83 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
 	"name": "passkit-generator",
-	"version": "3.1.8",
+	"version": "3.1.9",
 	"lockfileVersion": 2,
 	"requires": true,
 	"packages": {
 		"": {
 			"name": "passkit-generator",
-			"version": "3.1.8",
+			"version": "3.1.9",
 			"license": "MIT",
 			"dependencies": {
 				"do-not-zip": "^1.0.0",
diff --git a/package.json b/package.json
index a1bad16..b3749cd 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
 	"name": "passkit-generator",
-	"version": "3.1.8",
+	"version": "3.1.9",
 	"description": "The easiest way to generate custom Apple Wallet passes in Node.js",
 	"main": "lib/index.js",
 	"scripts": {
diff --git a/src/PKPass.ts b/src/PKPass.ts
index e1347f4..00d8bc8 100644
--- a/src/PKPass.ts
+++ b/src/PKPass.ts
@@ -556,6 +556,7 @@ export default class PKPass extends Bundle {
 				secondaryFields = [],
 				auxiliaryFields = [],
 				backFields = [],
+				transitType,
 			} = data[type] || {};
 
 			this.headerFields.push(...headerFields);
@@ -563,6 +564,10 @@ export default class PKPass extends Bundle {
 			this.secondaryFields.push(...secondaryFields);
 			this.auxiliaryFields.push(...auxiliaryFields);
 			this.backFields.push(...backFields);
+
+			if (this.type === "boardingPass") {
+				this.transitType = transitType;
+			}
 		}
 	}
 
diff --git a/src/schemas/Field.ts b/src/schemas/Field.ts
index 1c837c5..f9852a3 100644
--- a/src/schemas/Field.ts
+++ b/src/schemas/Field.ts
@@ -1,6 +1,31 @@
 import Joi from "joi";
 import { Semantics } from "./Semantics";
 
+export type PKDataDetectorType =
+	| "PKDataDetectorTypePhoneNumber"
+	| "PKDataDetectorTypeLink"
+	| "PKDataDetectorTypeAddress"
+	| "PKDataDetectorTypeCalendarEvent";
+
+export type PKTextAlignmentType =
+	| "PKTextAlignmentLeft"
+	| "PKTextAlignmentCenter"
+	| "PKTextAlignmentRight"
+	| "PKTextAlignmentNatural";
+
+export type PKDateStyleType =
+	| "PKDateStyleNone"
+	| "PKDateStyleShort"
+	| "PKDateStyleMedium"
+	| "PKDateStyleLong"
+	| "PKDateStyleFull";
+
+export type PKNumberStyleType =
+	| "PKNumberStyleDecimal"
+	| "PKNumberStylePercent"
+	| "PKNumberStyleScientific"
+	| "PKNumberStyleSpellOut";
+
 /**
  * @see https://developer.apple.com/documentation/walletpasses/passfieldcontent
  */
@@ -8,18 +33,18 @@ import { Semantics } from "./Semantics";
 export interface Field {
 	attributedValue?: string | number | Date;
 	changeMessage?: string;
-	dataDetectorTypes?: string[];
+	dataDetectorTypes?: PKDataDetectorType[];
 	label?: string;
-	textAlignment?: string;
+	textAlignment?: PKTextAlignmentType;
 	key: string;
 	value: string | number | Date;
 	semantics?: Semantics;
-	dateStyle?: string;
+	dateStyle?: PKDateStyleType;
 	ignoresTimeZone?: boolean;
 	isRelative?: boolean;
 	timeStyle?: string;
 	currencyCode?: string;
-	numberStyle?: string;
+	numberStyle?: PKNumberStyleType;
 }
 
 export interface FieldWithRow extends Field {