diff --git a/docker-compose.yml b/docker-compose.yml
index 1b3e2a84..fb140df7 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -10,6 +10,9 @@ services:
 
   redis:
     image: redis:alpine
+    security_opt:
+      - no-new-privileges:true
+    read_only: true
 
   sqli:
     build:
@@ -22,3 +25,4 @@ services:
       - 8080:8080
     command: |
       wait-for postgres:5432 -- python run.py
+
diff --git a/sqli/dao/student.py b/sqli/dao/student.py
index d41ef885..55d67a3c 100644
--- a/sqli/dao/student.py
+++ b/sqli/dao/student.py
@@ -40,8 +40,9 @@ async def get_many(conn: Connection, limit: Optional[int] = None,
     @staticmethod
     async def create(conn: Connection, name: str):
         q = ("INSERT INTO students (name) "
-             "VALUES ('%(name)s')" % {'name': name})
+             "VALUES (%s)")
         async with conn.cursor() as cur:
-            await cur.execute(q)
+            await cur.execute(q, (name,))
+
 
 
diff --git a/sqli/dao/user.py b/sqli/dao/user.py
index c663ddc3..1e2565c6 100644
--- a/sqli/dao/user.py
+++ b/sqli/dao/user.py
@@ -1,4 +1,4 @@
-from hashlib import md5
+from hashlib import md5, scrypt
 from typing import NamedTuple, Optional
 
 from aiopg import Connection
@@ -38,4 +38,5 @@ async def get_by_username(conn: Connection, username: str):
             return User.from_raw(await cur.fetchone())
 
     def check_password(self, password: str):
-        return self.pwd_hash == md5(password.encode('utf-8')).hexdigest()
+        return self.pwd_hash == scrypt(password.encode('utf-8'), salt=b'some_salt', n=16384, r=8, p=1).hex()
+