diff --git a/app/ipc/export_handlers.ts b/app/ipc/export_handlers.ts
index bfb6a03d..7fb3eab5 100644
--- a/app/ipc/export_handlers.ts
+++ b/app/ipc/export_handlers.ts
@@ -3,10 +3,12 @@ import { baseDir, downloadsDir } from "../utils/constants";
 import fs from "fs";
 import path from "path";
 import { showFileDownloadedDialog } from "../utils/dialog";
+import { sanitizeFilename } from "../utils";
+
 
 export function setupExportHandlers() {
   ipcMain.handle("file-downloaded", async (_, filePath: string): Promise<IPCStatus> => {
-    const fileName = path.basename(filePath);
+    const fileName = sanitizeFilename(path.basename(filePath));
     const destinationPath = path.join(downloadsDir, fileName);
 
     await fs.promises.rename(filePath, destinationPath);
@@ -42,7 +44,8 @@ export function setupExportHandlers() {
           margins: { top: 0, right: 0, bottom: 0, left: 0 }
         });
         browser.close();
-        const destinationPath = path.join(downloadsDir, `${title}.pdf`);
+        const sanitizedTitle = sanitizeFilename(title);
+        const destinationPath = path.join(downloadsDir, `${sanitizedTitle}.pdf`);
         await fs.promises.writeFile(destinationPath, pdfBuffer);
 
         const success = await showFileDownloadedDialog(destinationPath);
diff --git a/app/ipc/slide_metadata.ts b/app/ipc/slide_metadata.ts
index e98964dd..c3afe63c 100644
--- a/app/ipc/slide_metadata.ts
+++ b/app/ipc/slide_metadata.ts
@@ -95,7 +95,7 @@ export function setupSlideMetadataHandlers() {
     try {
       browser = await puppeteer.launch({
         headless: true,
-        executablePath: isDev ? undefined : path.join(baseDir, "dependencies/chrome-headless-shell/win_build/chrome-headless-shell.exe"),
+        executablePath: path.join(baseDir, "dependencies/chrome-headless-shell/win_build/chrome-headless-shell.exe"),
         args: ['--no-sandbox', '--disable-setuid-sandbox']
       });
 
diff --git a/app/utils/index.ts b/app/utils/index.ts
index 568db0bd..27238773 100644
--- a/app/utils/index.ts
+++ b/app/utils/index.ts
@@ -77,3 +77,7 @@ export async function findUnusedPorts(startPort: number = 40000, count: number =
   return ports;
 }
 
+export function sanitizeFilename(filename: string): string {
+  // Replace invalid characters with underscores
+  return filename.replace(/[<>:"/\\|?*]/g, '_');
+}
\ No newline at end of file
diff --git a/app/utils/servers.ts b/app/utils/servers.ts
index 297daed0..7f314121 100644
--- a/app/utils/servers.ts
+++ b/app/utils/servers.ts
@@ -4,6 +4,7 @@ import http from "http";
 
 // @ts-ignore
 import handler from "serve-handler";
+import path from "path";
 
 export async function startFastApiServer(
   directory: string,
@@ -13,10 +14,10 @@ export async function startFastApiServer(
 ) {
   // Start FastAPI server
   const startCommand = isDev ? [
-    ".venv/Scripts/python.exe",
+    path.join(directory, ".venv/Scripts/python.exe"),
     ["server_autoreload.py", "--port", port.toString()],
   ] : [
-    "./fastapi", ["--port", port.toString()],
+    path.join(directory, "fastapi"), ["--port", port.toString()],
   ];
 
 
@@ -27,6 +28,8 @@ export async function startFastApiServer(
       cwd: directory,
       stdio: ["inherit", "pipe", "pipe"],
       env: { ...process.env, ...env },
+      shell: true,
+      windowsHide: true,
     }
   );
   fastApiProcess.stdout.on("data", (data: any) => {
@@ -58,7 +61,7 @@ export async function startNextJsServer(
         stdio: ["inherit", "pipe", "pipe"],
         env: { ...process.env, ...env },
         shell: true,
-        windowsHide: true
+        windowsHide: true,
       }
     );
     nextjsProcess.stdout.on("data", (data: any) => {
diff --git a/build.js b/build.js
index e6f606d4..b45d0592 100644
--- a/build.js
+++ b/build.js
@@ -10,15 +10,11 @@ const config = {
     "resources",
     "app_dist",
     "node_modules",
-    "dependencies/chrome-headless-shell/win_build",
     "NOTICE",
   ],
-  // linux: {
-  //   target: ["AppImage"],
-  //   icon: "resources/ui/assets/images/presenton_short_filled.png",
-  // },
   win: {
     target: ["nsis"],
+    files: "dependencies/chrome-headless-shell/win_build",
     icon: "resources/ui/assets/images/presenton_short_filled.png"
   },
   nsis: {
diff --git a/servers/fastapi/server.py b/servers/fastapi/server.py
index 40db9df9..3935ca6e 100644
--- a/servers/fastapi/server.py
+++ b/servers/fastapi/server.py
@@ -14,4 +14,4 @@ if __name__ == "__main__":
     )
     args = parser.parse_args()
 
-    uvicorn.run("api.main:app", host="0.0.0.0", port=args.port, log_level="info")
+    uvicorn.run("api.main:app", host="127.0.0.1", port=args.port, log_level="info")
diff --git a/servers/fastapi/server_autoreload.py b/servers/fastapi/server_autoreload.py
index 4d5c00de..b0c4e49b 100644
--- a/servers/fastapi/server_autoreload.py
+++ b/servers/fastapi/server_autoreload.py
@@ -10,5 +10,5 @@ if __name__ == "__main__":
     args = parser.parse_args()
 
     uvicorn.run(
-        "api.main:app", host="0.0.0.0", port=args.port, log_level="info", reload=True
+        "api.main:app", host="127.0.0.1", port=args.port, log_level="info", reload=True
     )
diff --git a/servers/fastapi/server_test.py b/servers/fastapi/server_test.py
index 4b547a5c..f2446056 100644
--- a/servers/fastapi/server_test.py
+++ b/servers/fastapi/server_test.py
@@ -5,5 +5,5 @@ load_dotenv()
 
 if __name__ == "__main__":
     uvicorn.run(
-        "api.main:app", host="0.0.0.0", port=8000, log_level="info", reload=True
+        "api.main:app", host="127.0.0.1", port=8000, log_level="info", reload=True
     )