diff --git a/ui/src/App.vue b/ui/src/App.vue
index 98c6592..cbfd175 100644
--- a/ui/src/App.vue
+++ b/ui/src/App.vue
@@ -52,7 +52,7 @@ export default class App extends Vue {
     image_modal: ImageModal;
   };
 
-  public mounted(): void {
+  public mounted() {
     this.$advent22.api_get_string("days/date", (date: string) => {
       this.date = date;
     });
@@ -65,7 +65,7 @@ export default class App extends Vue {
     );
   }
 
-  private open_calendar_door(image_src: string): void {
+  private open_calendar_door(image_src: string) {
     this.$refs.image_modal.show_src(image_src);
   }
 }
diff --git a/ui/src/components/CalendarDoor.vue b/ui/src/components/CalendarDoor.vue
index f5d5682..595804b 100644
--- a/ui/src/components/CalendarDoor.vue
+++ b/ui/src/components/CalendarDoor.vue
@@ -17,7 +17,7 @@ export default class CalendarDoor extends Vue {
     return this.$advent22.api_url("days/image/" + this.day);
   }
 
-  private on_click(): void {
+  private on_click() {
     this.$advent22.api_get_blob("days/image/" + this.day, (data) => {
       this.$emit("openDoor", data);
     });
diff --git a/ui/src/components/ImageModal.vue b/ui/src/components/ImageModal.vue
index 9bbfb32..ee0aedf 100644
--- a/ui/src/components/ImageModal.vue
+++ b/ui/src/components/ImageModal.vue
@@ -17,17 +17,17 @@ export default class ImageModal extends Vue {
   private active = false;
   public image_src = "";
 
-  public created(): void {
+  public created() {
     window.addEventListener("keydown", (e) => {
       if (e.key == "Escape") this.set_active(false);
     });
   }
 
-  public set_active(state: boolean): void {
+  public set_active(state: boolean) {
     this.active = state;
   }
 
-  public show_src(src: string): void {
+  public show_src(src: string) {
     this.image_src = src;
     this.set_active(true);
   }
diff --git a/ui/src/components/LoginModal.vue b/ui/src/components/LoginModal.vue
index 815529b..2835935 100644
--- a/ui/src/components/LoginModal.vue
+++ b/ui/src/components/LoginModal.vue
@@ -44,20 +44,20 @@ export default class LoginModal extends Vue {
   private username = "";
   private password = "";
 
-  public created(): void {
+  public created() {
     window.addEventListener("keydown", (e) => {
       if (e.key == "Escape") this.set_active(false);
     });
   }
 
-  public set_active(state: boolean): void {
+  public set_active(state: boolean) {
     this.active = state;
 
     this.username = "";
     this.password = "";
   }
 
-  private submit(): void {
+  private submit() {
     this.$advent22.set_api_auth(this.username, this.password);
     this.set_active(false);
   }
diff --git a/ui/src/plugins/advent22.ts b/ui/src/plugins/advent22.ts
index e53ac30..ab678d3 100644
--- a/ui/src/plugins/advent22.ts
+++ b/ui/src/plugins/advent22.ts
@@ -46,7 +46,7 @@ export class Advent22 {
     endpoint: string,
     on_success: (data: T) => void,
     responseType: ResponseType = "json",
-  ): void {
+  ) {
     const req_data = {
       auth: this.api_auth,
       responseType: responseType,
@@ -60,7 +60,7 @@ export class Advent22 {
   public api_get_blob(
     endpoint: string,
     on_success: (data: string) => void,
-  ): void {
+  ) {
     this.api_get<Blob>(
       endpoint,
       (data: Blob) => {
@@ -81,7 +81,7 @@ export class Advent22 {
   public api_get_string(
     endpoint: string,
     on_success: (data: string) => void,
-  ): void {
+  ) {
     this.api_get<string>(
       endpoint,
       (data: string) => {
@@ -93,7 +93,7 @@ export class Advent22 {
   public api_get_number(
     endpoint: string,
     on_success: (data: number) => void,
-  ): void {
+  ) {
     this.api_get<number>(
       endpoint,
       (data: number) => {