diff --git a/demo/10-my-cv.ts b/demo/10-my-cv.ts
index 293fcff6ad..2a3f6bbabf 100644
--- a/demo/10-my-cv.ts
+++ b/demo/10-my-cv.ts
@@ -9,7 +9,46 @@ const PHONE_NUMBER = "07534563401";
 const PROFILE_URL = "https://www.linkedin.com/in/dolan1";
 const EMAIL = "docx@com";
 
-const experiences = [
+interface Experience {
+    readonly isCurrent: boolean;
+    readonly summary: string;
+    readonly title: string;
+    readonly startDate: {
+        readonly month: number;
+        readonly year: number;
+    };
+    readonly endDate?: {
+        readonly month: number;
+        readonly year: number;
+    };
+    readonly company: {
+        readonly name: string;
+    };
+}
+
+interface Education {
+    readonly degree: string;
+    readonly fieldOfStudy: string;
+    readonly notes: string;
+    readonly schoolName: string;
+    readonly startDate: {
+        readonly year: number;
+    };
+    readonly endDate: {
+        readonly year: number;
+    };
+}
+
+interface Skill {
+    readonly name: string;
+}
+
+interface Achivement {
+    readonly issuer: string;
+    readonly name: string;
+}
+
+const experiences: Experience[] = [
     {
         isCurrent: true,
         summary: "Full-stack developer working with Angular and Java. Working for the iShares platform",
@@ -75,12 +114,11 @@ const experiences = [
     },
 ];
 
-const education = [
+const education: Education[] = [
     {
         degree: "Master of Science (MSc)",
         fieldOfStudy: "Computer Science",
-        notes:
-            "Exam Results: 1st Class with Distinction, Dissertation: 1st Class with Distinction\n\nRelevant Courses: Java and C# Programming, Software Engineering, Artificial Intelligence, \nComputational Photography, Algorithmics, Architecture and Hardware.\n\nCreated a Windows 8 game in JavaScript for the dissertation. \n\nCreated an award-winning 3D stereoscopic game in C# using XNA.",
+        notes: "Exam Results: 1st Class with Distinction, Dissertation: 1st Class with Distinction\n\nRelevant Courses: Java and C# Programming, Software Engineering, Artificial Intelligence, \nComputational Photography, Algorithmics, Architecture and Hardware.\n\nCreated a Windows 8 game in JavaScript for the dissertation. \n\nCreated an award-winning 3D stereoscopic game in C# using XNA.",
         schoolName: "University College London",
         startDate: {
             year: 2012,
@@ -92,8 +130,7 @@ const education = [
     {
         degree: "Bachelor of Engineering (BEng)",
         fieldOfStudy: "Material Science and Engineering",
-        notes:
-            "Exam Results: 2:1, Dissertation: 1st Class with Distinction\n\nRelevant courses: C Programming, Mathematics and Business for Engineers.",
+        notes: "Exam Results: 2:1, Dissertation: 1st Class with Distinction\n\nRelevant courses: C Programming, Mathematics and Business for Engineers.",
         schoolName: "Imperial College London",
         startDate: {
             year: 2009,
@@ -104,7 +141,7 @@ const education = [
     },
 ];
 
-const skills = [
+const skills: Skill[] = [
     {
         name: "Angular",
     },
@@ -119,7 +156,7 @@ const skills = [
     },
 ];
 
-const achievements = [
+const achievements: Achivement[] = [
     {
         issuer: "Oracle",
         name: "Oracle Certified Expert",
@@ -128,7 +165,7 @@ const achievements = [
 
 class DocumentCreator {
     // tslint:disable-next-line: typedef
-    public create([experiences, educations, skills, achivements]): Document {
+    public create([experiences, educations, skills, achivements]: [Experience[], Education[], Skill[], Achivement[]]): Document {
         const document = new Document({
             sections: [
                 {
@@ -193,8 +230,7 @@ class DocumentCreator {
                         ),
                         new Paragraph("More references upon request"),
                         new Paragraph({
-                            text:
-                                "This CV was generated in real-time based on my Linked-In profile from my personal website www.dolan.bio.",
+                            text: "This CV was generated in real-time based on my Linked-In profile from my personal website www.dolan.bio.",
                             alignment: AlignmentType.CENTER,
                         }),
                     ],