diff --git a/src/pages/api/accounts/[id]/index.ts b/src/pages/api/accounts/[id]/index.ts
index 1dd3600..38a6234 100644
--- a/src/pages/api/accounts/[id]/index.ts
+++ b/src/pages/api/accounts/[id]/index.ts
@@ -1,5 +1,5 @@
+import { accountService } from '@data/db.service';
 import type { APIRoute } from 'astro';
-import { accountService } from '../../../../data/db.service';
 
 export const GET: APIRoute = async ({ params }) => {
   try {
diff --git a/src/pages/api/accounts/[id]/transactions/index.ts b/src/pages/api/accounts/[id]/transactions/index.ts
index 1332828..c99d20e 100644
--- a/src/pages/api/accounts/[id]/transactions/index.ts
+++ b/src/pages/api/accounts/[id]/transactions/index.ts
@@ -1,5 +1,5 @@
+import { transactionService } from '@data/db.service';
 import type { APIRoute } from 'astro';
-import { transactionService } from '../../../../../data/db.service';
 
 export const GET: APIRoute = async ({ params }) => {
   try {
diff --git a/src/pages/api/accounts/index.ts b/src/pages/api/accounts/index.ts
index 07b6dc4..21c4910 100644
--- a/src/pages/api/accounts/index.ts
+++ b/src/pages/api/accounts/index.ts
@@ -1,6 +1,6 @@
+import { AccountStatus, AccountType, accountService } from '@data/db.service';
+import type { Account } from '@types';
 import type { APIRoute } from 'astro';
-import { AccountStatus, AccountType, accountService } from '../../../data/db.service';
-import type { Account } from '../../../types';
 
 export const GET: APIRoute = async () => {
   try {
diff --git a/src/pages/api/transactions/[id]/index.ts b/src/pages/api/transactions/[id]/index.ts
index a64ede5..ec6fa32 100644
--- a/src/pages/api/transactions/[id]/index.ts
+++ b/src/pages/api/transactions/[id]/index.ts
@@ -1,6 +1,7 @@
+import { transactionService } from '@data/db.service';
+import type { Transaction } from '@types';
+import type { TransactionStatus, TransactionType } from '@types';
 import type { APIRoute } from 'astro';
-import { transactionService } from '../../../../data/db.service';
-import type { Transaction } from '../../../../types';
 
 export const GET: APIRoute = async ({ params }) => {
   try {
@@ -55,10 +56,39 @@ export const PUT: APIRoute = async ({ request, params }) => {
       });
     }
 
+    // Create a properly typed update object
+    const updatedData: Partial<{
+      accountId: string;
+      date: Date;
+      description: string;
+      amount: number;
+      category: string | undefined;
+      status: TransactionStatus | undefined;
+      type: TransactionType | undefined;
+      notes: string | undefined;
+      tags: string | undefined;
+    }> = {};
+
+    // Copy the properties we want to update
+    if (updates.accountId !== undefined) updatedData.accountId = updates.accountId;
+    if (updates.description !== undefined) updatedData.description = updates.description;
+    if (updates.amount !== undefined) updatedData.amount = Number(updates.amount);
+    if (updates.category !== undefined) updatedData.category = updates.category;
+    if (updates.notes !== undefined) updatedData.notes = updates.notes;
+    if (updates.tags !== undefined) updatedData.tags = updates.tags;
+
     // Convert date to Date object if it's a string
-    const updatedData: any = { ...updates };
-    if (typeof updates.date === 'string') {
-      updatedData.date = new Date(updates.date);
+    if (updates.date !== undefined) {
+      updatedData.date = typeof updates.date === 'string' ? new Date(updates.date) : updates.date;
+    }
+
+    // Cast status and type to enum types if provided
+    if (updates.status !== undefined) {
+      updatedData.status = updates.status as TransactionStatus;
+    }
+
+    if (updates.type !== undefined) {
+      updatedData.type = updates.type as TransactionType;
     }
 
     // Update the transaction using the service
diff --git a/src/pages/api/transactions/index.ts b/src/pages/api/transactions/index.ts
index 4b4e2c3..8f499ba 100644
--- a/src/pages/api/transactions/index.ts
+++ b/src/pages/api/transactions/index.ts
@@ -10,9 +10,10 @@
  * - Set up proper CORS configuration
  */
 
+import { accountService, transactionService } from '@data/db.service';
+import type { Transaction } from '@types';
+import type { TransactionStatus, TransactionType } from '@types';
 import type { APIRoute } from 'astro';
-import { accountService, transactionService } from '../../../data/db.service';
-import type { Transaction } from '../../../types';
 
 /**
  * TODO: API Improvements
@@ -61,10 +62,10 @@ export const POST: APIRoute = async ({ request }) => {
       accountId: transaction.accountId,
       date: transactionDate,
       description: transaction.description,
-      amount: transaction.amount,
+      amount: Number(transaction.amount),
       category: transaction.category,
-      status: transaction.status as any,
-      type: transaction.type as any,
+      status: transaction.status as TransactionStatus,
+      type: transaction.type as TransactionType,
       notes: transaction.notes,
       tags: transaction.tags,
     });
diff --git a/tsconfig.json b/tsconfig.json
index 92a18df..8130b47 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -4,6 +4,18 @@
   "exclude": ["dist"],
   "compilerOptions": {
     "jsx": "react-jsx",
-    "jsxImportSource": "react"
+    "jsxImportSource": "react",
+    "baseUrl": ".",
+    "paths": {
+      "@/*": ["src/*"],
+      "@components/*": ["src/components/*"],
+      "@layouts/*": ["src/layouts/*"],
+      "@data/*": ["src/data/*"],
+      "@pages/*": ["src/pages/*"],
+      "@styles/*": ["src/styles/*"],
+      "@stores/*": ["src/stores/*"],
+      "@utils/*": ["src/utils.ts"],
+      "@types": ["src/types.ts"]
+    }
   }
 }