diff --git a/backend/models/packs.js b/backend/models/packs.js
index 98a7415..1cde483 100644
--- a/backend/models/packs.js
+++ b/backend/models/packs.js
@@ -1,8 +1,8 @@
 const mongoose = require('mongoose')
 
 const packPriceSchema = mongoose.Schema({
-    userToken: { type: mongoose.Schema.Types.String, ref: 'users' },
-    price: Number,
+    userToken: String,
+    price: Number
 })
 
 const packSchema = mongoose.Schema({
diff --git a/backend/models/users.js b/backend/models/users.js
index a42d9ca..5a0a94b 100644
--- a/backend/models/users.js
+++ b/backend/models/users.js
@@ -1,5 +1,10 @@
 const mongoose = require('mongoose')
 
+const packIdSchema = mongoose.Schema({
+    packId: [{ type: mongoose.Schema.Types.ObjectId, ref: 'packs' }],
+    quantity: Number
+})
+
 const userSchema = mongoose.Schema({
     email: String,
     username: String,
@@ -7,8 +12,8 @@ const userSchema = mongoose.Schema({
     stock: Number,
     token: String,
     credits: Number,
-    cardsId: [{type: mongoose.Schema.Types.ObjectId, ref: 'cards'}],
-    packsId: [{type: mongoose.Schema.Types.ObjectId, ref: 'packs'}],
+    cardsId: [{ type: mongoose.Schema.Types.ObjectId, ref: 'cards' }],
+    packsId: [packIdSchema]
 })
 
 const User = mongoose.model('users', userSchema)
diff --git a/backend/routes/pack.js b/backend/routes/pack.js
index 5207901..2404f32 100644
--- a/backend/routes/pack.js
+++ b/backend/routes/pack.js
@@ -11,25 +11,49 @@ router.get("/marketPacks", (req, res) => {
   Pack.find({ 'packPrices.price': { $gt: 0 } })
     .then((pack) => {
       res.json({ result: true, pack: pack })
-    });
-});
+    })
+})
 
 router.patch("/openPack/:userToken/:userPack", async (req, res) => {
   // find the pack to open
-  const user = await User.findOne({ "token": req.params.userToken })
-  console.log("User cards: ", user.cardsId)
-  const userId = await user._id
-  const pack = await Pack.findOne({ "_id": req.params.userPack, "packPrices.userToken": req.params.userToken })
-  // Decrease pack Stock
-  const packToUpdate = pack.packPrices[0]._id
+  const pack = await Pack.findOne({ "_id": req.params.userPack })
+
+  // Decrease pack's Stock
   const newStock = Number(pack.stock) - 1
-  await Pack.updateOne({ "packPrices.userToken": req.params.userToken }, { "stock": newStock })
+  await Pack.updateOne({ "_id": req.params.userPack }, { "stock": newStock })
+  const packsEligible = []
+  pack.packPrices.map((e) => {
+    if (e.userToken == req.params.userToken) {
+      packsEligible.push(e)
+    }
+  })
 
+  const packToremove = packsEligible[0]._id
   // Remove user from Pack
   await Pack.updateOne(
     { "_id": req.params.userPack },
-    { $pull: { "packPrices": { "_id": packToUpdate } } }
+    { $pull: { "packPrices": { "_id": packToremove } } }
   )
+
+  // Decrease pack quantity for user
+
+  const packQtyToDecrease = await User.findOne({ "token": req.params.userToken })
+
+  packQtyToDecrease.packsId.map((e) => {
+    if (e.packId == req.params.userPack) {
+      User.updateOne({
+        "packsId": {
+          "packId": req.params.userPack
+        }
+      }, {
+        "packsId": {
+          "quantity": packsEligible.length
+        }
+      })
+    }
+  })
+
+  // Give 5 random cards to user
   const cardsToAdd = await Card.aggregate([
     { $sample: { size: 5 } }
   ])
@@ -37,13 +61,14 @@ router.patch("/openPack/:userToken/:userPack", async (req, res) => {
     await Card.updateOne({ "_id": card._id }, {
       $push: {
         "cardPrices": {
-          price: 3000,
-          userId: userId
+          price: 0,
+          userToken: req.params.userToken
         }
       }
     })
 
     await User.updateOne({ "token": req.params.userToken }, { $push: { "cardsId": card._id } })
+    res.json({ result: true, newCards: cardsToAdd })
   })
 })
 
diff --git a/backend/routes/users.js b/backend/routes/users.js
index ed0126a..92fe039 100644
--- a/backend/routes/users.js
+++ b/backend/routes/users.js
@@ -28,7 +28,7 @@ router.post("/signup", (req, res) => {
         email: req.body.email,
         password: hash,
         token: token,
-        credits: Math.floor(Math.random()*89999+10000),
+        credits: Math.floor(Math.random() * 89999 + 10000),
         gamesId: [],
         cardsId: [],
         packsId: ["657ad5ea8f96e935b9b105a4"],
@@ -69,6 +69,7 @@ router.post("/signin", (req, res) => {
         res.json({ result: false, error: "Wrong password" });
         return;
       }
+      console.log(data.packsList)
       res.json({
         result: true,
         token: data.token,
diff --git a/frontend/components/modals/SigninModal.js b/frontend/components/modals/SigninModal.js
index f65c59d..167f3cf 100644
--- a/frontend/components/modals/SigninModal.js
+++ b/frontend/components/modals/SigninModal.js
@@ -22,17 +22,17 @@ function SigninModal() {
             headers: { 'Content-Type': 'application/json' },
             body: JSON.stringify({ email: signinEmail, password: signinPassword }),
         })
-        .then(response => response.json())
-        .then(data => {
-            if(data.result) {
-                setSigninEmail('')
-                setSigninPassword('')
-                addUser({ token: data.token, email: signinEmail, username: data.username, cardsList: data.cardsList, gamesList: data.gamesList, packsList: data.packsList })
-                router.push("/home");
-            } else {
-                setErrorMessage(data.error)
-            }
-        })
+            .then(response => response.json())
+            .then(data => {
+                if (data.result) {
+                    setSigninEmail('')
+                    setSigninPassword('')
+                    addUser({ token: data.token, email: signinEmail, username: data.username, cardsList: data.cardsList, gamesList: data.gamesList, packsList: data.packsList })
+                    router.push("/home");
+                } else {
+                    setErrorMessage(data.error)
+                }
+            })
     }
     const state = useSelector((state) => state.users.value)
     return (
diff --git a/frontend/reducers/users.js b/frontend/reducers/users.js
index 2424a9c..0548660 100644
--- a/frontend/reducers/users.js
+++ b/frontend/reducers/users.js
@@ -1,7 +1,7 @@
 import { createSlice } from '@reduxjs/toolkit'
 
 const initialState = {
-    value: { token: null, username: null, email: null, cardsList: [], packsList: []}
+    value: { token: null, username: null, email: null, cardsList: [], packsList: [] }
 }
 
 export const usersSlice = createSlice({