diff --git a/app.js b/app.js
index cf5c8f1..d39ff95 100644
--- a/app.js
+++ b/app.js
@@ -1,69 +1,23 @@
 import { SplidClient } from 'splid-js';
-import {google} from "googleapis";
-
-// Emoji name mapping - add your aliases as needed
-const NAME_ALIASES = {
-  // 🙃 aliases
-  'vrouba von vrbicz': '🙃',
-  'vróbič': '🙃',
-  'vrba vrbička': '🙃',
-  'jirka v.': '🙃',
-
-  // 👨‍🏭 aliases
-  'párek z mourkova': '👨‍🏭',
-  'marek': '👨‍🏭',
-  'mourek': '👨‍🏭',
-  'mourek (jen láhve)': '👨‍🏭',
-
-  // 🤒 aliases
-  'kruzík ruzický': '🤒',
-  'kruzík ruzík': '🤒',
-  'krouzič': '🤒',
-
-  // 🤑 aliases
-  'matuzalém kremžský': '🤑',
-  'matuzalém i/ii.': '🤑',
-  'matúš': '🤑',
-
-  // 😎 aliases
-  'martin': '😎',
-  'martin brony veleblil': '😎',
-  'veleblil bobajz z broníkova': '😎',
-  'bronos': '😎',
-
-  // 🤯 aliases
-  'ja': '🤯',
-  'kuba': '🤯',
-  'kuba-buba': '🤯',
-  "d'artakuba zlominoha": '🤯',
-  'kuba zlominoha': '🤯',
-
-  // 😴 aliases
-  'sam': '😴',
-  'ditrpich von šalina': '😴',
-
-  // 🍖 aliases
-  'šunka šunkovič šunkovský': '🍖',
-  'šunka pražský': '🍖',
-  'šunkovič': '🍖',
-  'dan': '🍖',
-
-  // Default for unrecognized aliases
-  'default': 'Ostatní'
-};
+import { google } from "googleapis";
+import { 
+  NAME_ALIASES, 
+  SPREADSHEET_ID, 
+  SHEETS_CONFIG, 
+  SHEET_RANGES, 
+  TABLE_RESET_ROW_COUNT, 
+  TABLE_COLUMN_COUNT,
+  SHEET_ID,
+  COLUMN_INDICES 
+} from './constants.js';
 
 function getNameFromAlias(alias) {
   return NAME_ALIASES[alias.toLowerCase()] || NAME_ALIASES['default'];
 }
 
-const spreadsheetId = '1RxeQTnirJILgqXDuvI2RQt9vljn1Jz_JFCzVDRQviIg';
 // Create a reusable sheets API client
 async function createSheetsClient() {
-  const auth = new google.auth.GoogleAuth({
-    keyFile: 'application-key.json',
-    scopes: ['https://www.googleapis.com/auth/spreadsheets'],
-  });
-
+  const auth = new google.auth.GoogleAuth(SHEETS_CONFIG);
   return google.sheets({ version: 'v4', auth });
 }
 
@@ -137,14 +91,11 @@ async function getSplidData(splidCode) {
 }
 
 async function resetTableData() {
-  // Define a reasonable number of rows to clear/fill (adjust as needed)
-  const rowCount = 100;
-
-  // Create an array of arrays with "-" for each cell in columns E through L
-  const dashData = Array(rowCount).fill().map(() => Array(9).fill("-"));
+  // Create an array of arrays with "-" for each cell
+  const dashData = Array(TABLE_RESET_ROW_COUNT).fill().map(() => Array(TABLE_COLUMN_COUNT).fill("-"));
 
   try {
-    await updateSheetData(spreadsheetId, 'Splidy!E2:M', dashData);
+    await updateSheetData(SPREADSHEET_ID, SHEET_RANGES.DATA_RESET, dashData);
   } catch (err) {
     console.error('Error resetting table data:', err);
     throw err;
@@ -152,10 +103,11 @@ async function resetTableData() {
 }
 
 async function main() {
-  const splidCodes = await getSheetData(spreadsheetId, 'Splidy!C2:C');
-  const userTags = await getSheetData(spreadsheetId, 'Splidy!E1:M1'); // Get header row as array
+  const splidCodes = await getSheetData(SPREADSHEET_ID, SHEET_RANGES.SPLID_CODES);
+  const userTags = await getSheetData(SPREADSHEET_ID, SHEET_RANGES.USER_TAGS);
 
   console.log(splidCodes);
+  console.log("Resetting table data.")
   await resetTableData();
 
   for (let i = 0; i < splidCodes.length; i++) {
@@ -177,7 +129,7 @@ async function main() {
     }
 
     // Update the sheet with the row data
-    await updateSheetData(spreadsheetId, `Splidy!E${i+2}:M${i+2}`, [rowData]);
+    await updateSheetData(SPREADSHEET_ID, SHEET_RANGES.DATA_ROW(i), [rowData]);
   }
 }
 
diff --git a/constants.js b/constants.js
new file mode 100644
index 0000000..794b31a
--- /dev/null
+++ b/constants.js
@@ -0,0 +1,76 @@
+export const NAME_ALIASES = {
+  // 🙃 aliases
+  'vrouba von vrbicz': '🙃',
+  'vróbič': '🙃',
+  'vrba vrbička': '🙃',
+  'jirka v.': '🙃',
+
+  // 👨‍🏭 aliases
+  'párek z mourkova': '👨‍🏭',
+  'marek': '👨‍🏭',
+  'mourek': '👨‍🏭',
+  'mourek (jen láhve)': '👨‍🏭',
+
+  // 🤒 aliases
+  'kruzík ruzický': '🤒',
+  'kruzík ruzík': '🤒',
+  'krouzič': '🤒',
+
+  // 🤑 aliases
+  'matuzalém kremžský': '🤑',
+  'matuzalém i/ii.': '🤑',
+  'matúš': '🤑',
+
+  // 😎 aliases
+  'martin': '😎',
+  'martin brony veleblil': '😎',
+  'veleblil bobajz z broníkova': '😎',
+  'bronos': '😎',
+
+  // 🤯 aliases
+  'ja': '🤯',
+  'kuba': '🤯',
+  'kuba-buba': '🤯',
+  "d'artakuba zlominoha": '🤯',
+  'kuba zlominoha': '🤯',
+
+  // 😴 aliases
+  'sam': '😴',
+  'ditrpich von šalina': '😴',
+
+  // 🍖 aliases
+  'šunka šunkovič šunkovský': '🍖',
+  'šunka pražský': '🍖',
+  'šunkovič': '🍖',
+  'dan': '🍖',
+
+  // Default for unrecognized aliases
+  'default': 'Ostatní'
+};
+
+export const SPREADSHEET_ID = '1RxeQTnirJILgqXDuvI2RQt9vljn1Jz_JFCzVDRQviIg';
+
+// Google Sheets configuration
+export const SHEETS_CONFIG = {
+  keyFile: 'application-key.json',
+  scopes: ['https://www.googleapis.com/auth/spreadsheets'],
+};
+
+// Sheet ranges
+export const SHEET_RANGES = {
+  SPLID_CODES: 'Splidy!C2:C',
+  USER_TAGS: 'Splidy!E1:M1',
+  DATA_RESET: 'Splidy!E2:M',
+  DATA_ROW: (rowIndex) => `Splidy!E${rowIndex + 2}:M${rowIndex + 2}`
+};
+
+// Other constants
+export const TABLE_RESET_ROW_COUNT = 100;
+export const TABLE_COLUMN_COUNT = 9; // Columns E through M
+
+export const COLUMN_INDICES = {
+  E: 4, 
+  M: 12 
+};
+
+export const SHEET_ID = 0;