diff --git a/.vscode/settings.json b/.vscode/settings.json
index c5ff4f7c1..4a90936f0 100644
--- a/.vscode/settings.json
+++ b/.vscode/settings.json
@@ -30,5 +30,8 @@
     "**/.git": true,
     "**/.DS_Store": true,
     ".tsconfig.tsbuildinfo": true
+  },
+  "editor.codeActionsOnSave": {
+    "source.fixAll.eslint": true
   }
 }
diff --git a/package.json b/package.json
index 5fbd0d9d6..d99f98101 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "xero-node",
-  "version": "4.4.9",
+  "version": "4.5.2",
   "description": "Xero NodeJS OAuth 2.0 client for xero-node",
   "main": "dist/index.js",
   "types": "dist/index.d.ts",
diff --git a/src/gen/model/accounting/models.ts b/src/gen/model/accounting/models.ts
index d70d41271..6df08c780 100644
--- a/src/gen/model/accounting/models.ts
+++ b/src/gen/model/accounting/models.ts
@@ -507,7 +507,7 @@ export class ObjectSerializer {
         if (data == undefined) {
             return data;
         } else if (primitives.indexOf(type.toLowerCase()) !== -1) {
-            if (type === "string" && data.substring(0, 6) === "/Date(") {
+            if (type === "string" && data.toString().substring(0, 6) === "/Date(") {
                 return this.deserializeDateFormats(type, data) // For MS dates that are of type 'string'
             }
             else {
diff --git a/src/gen/model/assets/models.ts b/src/gen/model/assets/models.ts
index 273015f43..5940cd7ca 100644
--- a/src/gen/model/assets/models.ts
+++ b/src/gen/model/assets/models.ts
@@ -154,7 +154,7 @@ export class ObjectSerializer {
         if (data == undefined) {
             return data;
         } else if (primitives.indexOf(type.toLowerCase()) !== -1) {
-            if (type === "string" && data.substring(0, 6) === "/Date(") {
+            if (type === "string" && data.toString().substring(0, 6) === "/Date(") {
                 return this.deserializeDateFormats(type, data) // For MS dates that are of type 'string'
             }
             else {
diff --git a/src/gen/model/projects/models.ts b/src/gen/model/projects/models.ts
index 29ec8c18e..a48341b95 100644
--- a/src/gen/model/projects/models.ts
+++ b/src/gen/model/projects/models.ts
@@ -171,7 +171,7 @@ export class ObjectSerializer {
         if (data == undefined) {
             return data;
         } else if (primitives.indexOf(type.toLowerCase()) !== -1) {
-            if (type === "string" && data.substring(0, 6) === "/Date(") {
+            if (type === "string" && data.toString().substring(0, 6) === "/Date(") {
                 return this.deserializeDateFormats(type, data) // For MS dates that are of type 'string'
             }
             else {