diff --git a/.gitignore b/.gitignore
index 2dc53ca..7d490f1 100644
--- a/.gitignore
+++ b/.gitignore
@@ -50,6 +50,7 @@ coverage.xml
 .hypothesis/
 .pytest_cache/
 cover/
+/data
 
 # Translations
 *.mo
@@ -152,9 +153,10 @@ dmypy.json
 # Cython debug symbols
 cython_debug/
 
+
 # PyCharm
 #  JetBrains specific template is maintained in a separate JetBrains.gitignore that can
 #  be found at https://github.com/github/gitignore/blob/main/Global/JetBrains.gitignore
 #  and can be added to the global gitignore or merged into this file.  For a more nuclear
 #  option (not recommended) you can uncomment the following to ignore the entire idea folder.
-.idea/
+.idea/
\ No newline at end of file
diff --git a/data/MAQR b/data/MAQR
new file mode 100644
index 0000000..7d957d0
--- /dev/null
+++ b/data/MAQR
@@ -0,0 +1 @@
+This is a test data
\ No newline at end of file
diff --git a/data/test b/data/test
deleted file mode 100644
index af27ff4..0000000
--- a/data/test
+++ /dev/null
@@ -1 +0,0 @@
-This is a test file.
\ No newline at end of file
diff --git a/pre-commit-config.yaml b/pre-commit-config.yaml
new file mode 100644
index 0000000..6f4b854
--- /dev/null
+++ b/pre-commit-config.yaml
@@ -0,0 +1,10 @@
+repos:
+  - repo: https://github.com/astral-sh/ruff-pre-commit
+    rev: v0.1.9
+    hooks:
+      - id: ruff
+        args:
+          - --fix
+      - id: ruff-format
+ci:
+  autoupdate_schedule: weekly
diff --git a/src/paste/main.py b/src/paste/main.py
index b60bb1b..c4eb327 100644
--- a/src/paste/main.py
+++ b/src/paste/main.py
@@ -2,6 +2,7 @@
 from fastapi.responses import PlainTextResponse, HTMLResponse, RedirectResponse
 import shutil
 import os
+import sys
 from pathlib import Path
 from fastapi import FastAPI
 from fastapi.templating import Jinja2Templates
@@ -32,25 +33,29 @@
 
 templates = Jinja2Templates(directory=str(Path(BASE_DIR, "templates")))
 
+MAX_UPLOAD_SIZE = 20_000_000 # 20 MB
 
 @app.post("/file")
 @limiter.limit("100/minute")
-async def post_as_a_file(request: Request, file: UploadFile = File(...)):
+async def post_as_a_file(file: UploadFile = File(...)):
+    if file.content_type != "text/plain":
+        raise HTTPException(detail="Only text/plain is supported",
+                            status_code=status.HTTP_415_UNSUPPORTED_MEDIA_TYPE)
+    if file.filesize > MAX_UPLOAD_SIZE:
+        raise HTTPException(detail="File size is too large",
+                            status_code=status.HTTP_413_REQUEST_ENTITY_TOO_LARGE)
     try:
         uuid = generate_uuid()
         if uuid in large_uuid_storage:
             uuid = generate_uuid()
         path = f"data/{uuid}"
-        with open(path, "wb") as f:
+        with open(path, 'wb') as f:
             shutil.copyfileobj(file.file, f)
             large_uuid_storage.append(uuid)
-            print(large_uuid_storage)
     except Exception:
         # return {"message": "There was an error uploading the file"}
-        raise HTTPException(
-            detail="There was an error uploading the file",
-            status_code=status.HTTP_403_FORBIDDEN,
-        )
+        raise HTTPException(detail="There was an error uploading the file",
+                            status_code=status.HTTP_403_FORBIDDEN)
     finally:
         file.file.close()
 
@@ -58,17 +63,21 @@ async def post_as_a_file(request: Request, file: UploadFile = File(...)):
 
 
 @app.get("/paste/{uuid}")
-async def post_as_a_text(uuid):
+def post_as_a_text(uuid):
     path = f"data/{uuid}"
+    text = ""
     try:
-        with open(path, "rb") as f:
-            return PlainTextResponse(f.read())
+        with open(path, 'rb') as f:
+            text = f.read()
+        if sys.getsizeof(text) > MAX_UPLOAD_SIZE:
+            raise HTTPException(detail="File size is too large",
+                                status_code=status.HTTP_413_REQUEST_ENTITY_TOO_LARGE)
+        else:
+            return PlainTextResponse(text)
     except Exception as e:
         print(e)
-        raise HTTPException(
-            detail="404: The Requested Resource is not found",
-            status_code=status.HTTP_404_NOT_FOUND,
-        )
+        raise HTTPException(detail="404: The Requested Resource is not found",
+                            status_code=status.HTTP_404_NOT_FOUND)
 
 
 @app.get("/", response_class=HTMLResponse)