diff --git a/app.py b/app.py
index ff088c5..3f1cf6b 100644
--- a/app.py
+++ b/app.py
@@ -68,7 +68,7 @@ def buy():
         return render_template("buy.html")
     else:
         symbol = request.form.get("symbol")
-        shares = request.form.get("shares")
+        shares = float(request.form.get("shares"))
 
         if not symbol:
             return apology("Not Symbol")
@@ -79,7 +79,7 @@ def buy():
             return apology("Symbol not found")
 
         if not shares == "":
-            transaction_value = int(shares) * stock["price"]
+            transaction_value = float(shares) * stock["price"]
 
             user_id = session["user_id"]
             user_cash_db = db.execute("SELECT cash FROM users WHERE id = ?", user_id)
@@ -205,6 +205,12 @@ def register():
         username = request.form.get("username")
         password = request.form.get("password")
 
+        username_exists = db.execute("SELECT * FROM users WHERE username = ?", username)
+
+        if username_exists:
+            flash("Username exists already!")
+            return render_template("register.html")
+
         db.execute("INSERT INTO users(username, hash) VALUES(?, ?)",
                    username, generate_password_hash(password))
         return redirect("/")
diff --git a/finance.db b/finance.db
index 48cecf2..f4d2422 100644
Binary files a/finance.db and b/finance.db differ
diff --git a/flask_session/2029240f6d1128be89ddc32729463129 b/flask_session/2029240f6d1128be89ddc32729463129
index 8b04914..60b84f8 100644
Binary files a/flask_session/2029240f6d1128be89ddc32729463129 and b/flask_session/2029240f6d1128be89ddc32729463129 differ
diff --git a/flask_session/4c5bec882c6cb133810c5c1724f348ac b/flask_session/4c5bec882c6cb133810c5c1724f348ac
deleted file mode 100644
index 9b13009..0000000
Binary files a/flask_session/4c5bec882c6cb133810c5c1724f348ac and /dev/null differ
diff --git a/templates/buy.html b/templates/buy.html
index 2659c6e..b34ebb5 100644
--- a/templates/buy.html
+++ b/templates/buy.html
@@ -10,7 +10,7 @@
             <input class="form-control mx-auto w-auto" autocomplete="off" autofocus="" name="symbol" placeholder="Symbol" type="text">
         </div>
         <div class="mb-3">
-            <input class="form-control mx-auto w-auto" autocomplete="off" autofocus min="1" name="shares" placeholder="Shares" type="number">
+            <input class="form-control mx-auto w-auto" autocomplete="off" autofocus min="1" name="shares" placeholder="Shares" type="text">
         </div>
         <button class="btn btn-primary" type="submit">Buy</button>
     </form>