diff --git a/config/config.json b/config/config.json
index 37e61d87..4c46361c 100644
--- a/config/config.json
+++ b/config/config.json
@@ -1,17 +1,13 @@
 {
   "development": {
+    "username": "sequelize",
+    "password": "sequelize",
     "database": "project_organizer_development",
     "host": "127.0.0.1",
     "dialect": "postgres"
   },
-  "test": {
-    "database": "project_organizer_test",
-    "host": "127.0.0.1",
-    "dialect": "postgres"
-  },
   "production": {
-    "database": "project_organizer_production",
-    "host": "127.0.0.1",
+    "use_env_variable": "DATABASE_URL",
     "dialect": "postgres"
   }
 }
diff --git a/controllers/categories.js b/controllers/categories.js
new file mode 100644
index 00000000..85041a7a
--- /dev/null
+++ b/controllers/categories.js
@@ -0,0 +1,32 @@
+let express = require("express");
+let db = require("../models");
+let router = express.Router();
+
+router.get("/", (req, res) => {
+  db.category
+    .findAll()
+    .then((categories) => {
+      res.render("categories/index", { categories: categories });
+    })
+    .catch((error) => {
+      console.log("Error in GET /", error);
+      res.status(400).render("main/404");
+    });
+});
+
+// GET /categories/:id - display a specific category
+router.get("/:id", async (req, res) => {
+  try {
+    const category = await db.category.findOne({
+      where: { id: req.params.id },
+    });
+    if (!category) throw Error();
+    const projects = await category.getProjects();
+    res.render("categories/show", { category: category, projects: projects });
+  } catch (error) {
+    console.log(error);
+    res.status(400).render("main/404");
+  }
+});
+
+module.exports = router;
diff --git a/controllers/projects.js b/controllers/projects.js
index 3d878a8a..b012227d 100644
--- a/controllers/projects.js
+++ b/controllers/projects.js
@@ -1,40 +1,49 @@
-let express = require('express')
-let db = require('../models')
-let router = express.Router()
+let express = require("express");
+let db = require("../models");
+let router = express.Router();
 
-// POST /projects - create a new project
-router.post('/', (req, res) => {
-  db.project.create({
-    name: req.body.name,
-    githubLink: req.body.githubLink,
-    deployLink: req.body.deployedLink,
-    description: req.body.description
-  })
-  .then((project) => {
-    res.redirect('/')
-  })
-  .catch((error) => {
-    res.status(400).render('main/404')
-  })
-})
+router.post("/", async (req, res) => {
+  try {
+    const newProject = await db.project.create({
+      name: req.body.name,
+      githubLink: req.body.githubLink,
+      deployLink: req.body.deployedLink,
+      description: req.body.description,
+    });
+    const categoryInputs = await req.body.category.split(", ");
+    console.log(categoryInputs);
+    categoryInputs.forEach(async (categoryInput) => {
+      const [category] = await db.category.findOrCreate({
+        where: {
+          name: categoryInput,
+        },
+      });
+      newProject.addCategory(category);
+    });
+    res.redirect("../");
+  } catch (error) {
+    res.status(400).render("main/404");
+  }
+});
 
 // GET /projects/new - display form for creating a new project
-router.get('/new', (req, res) => {
-  res.render('projects/new')
-})
+router.get("/new", (req, res) => {
+  res.render("projects/new");
+});
 
 // GET /projects/:id - display a specific project
-router.get('/:id', (req, res) => {
-  db.project.findOne({
-    where: { id: req.params.id }
-  })
-  .then((project) => {
-    if (!project) throw Error()
-    res.render('projects/show', { project: project })
-  })
-  .catch((error) => {
-    res.status(400).render('main/404')
-  })
-})
+router.get("/:id", (req, res) => {
+  db.project
+    .findOne({
+      where: { id: req.params.id },
+    })
+    .then((project) => {
+      if (!project) throw Error();
+      res.render("projects/show", { project: project });
+    })
+    .catch((error) => {
+      res.status(400).render("main/404");
+    });
+});
 
-module.exports = router
+module.exports = router;
diff --git a/dbTest.js b/dbTest.js
new file mode 100644
index 00000000..4f746be9
--- /dev/null
+++ b/dbTest.js
@@ -0,0 +1,16 @@
+const db = require("./models");
+
+db.project
+  .findOne({
+    where: { id: 1 },
+    include: [db.category],
+  })
+  .then((project) => {
+    // by using eager loading, the project model should have a categories key
+    console.log(project.categories);
+
+    // createCategory function should be available to this model - it will create the category then add it to the project
+    project.createCategory({ name: "express" }).then((category) => {
+      console.log(category.id);
+    });
+  });
diff --git a/index.js b/index.js
index f404f83d..baf4b471 100644
--- a/index.js
+++ b/index.js
@@ -1,35 +1,37 @@
-const express = require('express')
-const ejsLayouts = require('express-ejs-layouts')
-const db = require('./models')
-const rowdy = require('rowdy-logger')
+const express = require("express");
+const ejsLayouts = require("express-ejs-layouts");
+const db = require("./models");
+const rowdy = require("rowdy-logger");
 
-const app = express()
-const PORT = process.env.PORT || 3000
-rowdy.begin(app)
+const app = express();
+const PORT = process.env.PORT || 3000;
+rowdy.begin(app);
 
-app.set('view engine', 'ejs')
-app.use(require('morgan')('dev'))
-app.use(express.urlencoded({ extended: false }))
-app.use(ejsLayouts)
+app.set("view engine", "ejs");
+app.use(require("morgan")("dev"));
+app.use(express.urlencoded({ extended: false }));
+app.use(ejsLayouts);
 
-app.get('/', (req, res) => {
-  db.project.findAll()
-  .then((projects) => {
-    res.render('main/index', { projects: projects })
-  })
-  .catch((error) => {
-    console.log('Error in GET /', error)
-    res.status(400).render('main/404')
-  })
-})
+app.get("/", (req, res) => {
+  db.project
+    .findAll()
+    .then((projects) => {
+      res.render("main/index", { projects: projects });
+    })
+    .catch((error) => {
+      console.log("Error in GET /", error);
+      res.status(400).render("main/404");
+    });
+});
 
-app.use('/projects', require('./controllers/projects'))
+app.use("/projects", require("./controllers/projects"));
+app.use("/categories", require("./controllers/categories"));
 
-app.get('*', (req, res) => {
-  res.render('main/404')
-})
+app.get("*", (req, res) => {
+  res.render("main/404");
+});
 
-app.listen(PORT, function() {
-  rowdy.print()
-  console.log(`listening on port: ${PORT}`)
-})
+app.listen(PORT, function () {
+  rowdy.print();
+  console.log(`listening on port: ${PORT}`);
+});
diff --git a/migrations/20230405222904-create-category.js b/migrations/20230405222904-create-category.js
new file mode 100644
index 00000000..8e52fd79
--- /dev/null
+++ b/migrations/20230405222904-create-category.js
@@ -0,0 +1,28 @@
+'use strict';
+/** @type {import('sequelize-cli').Migration} */
+module.exports = {
+  async up(queryInterface, Sequelize) {
+    await queryInterface.createTable('categories', {
+      id: {
+        allowNull: false,
+        autoIncrement: true,
+        primaryKey: true,
+        type: Sequelize.INTEGER
+      },
+      name: {
+        type: Sequelize.STRING
+      },
+      createdAt: {
+        allowNull: false,
+        type: Sequelize.DATE
+      },
+      updatedAt: {
+        allowNull: false,
+        type: Sequelize.DATE
+      }
+    });
+  },
+  async down(queryInterface, Sequelize) {
+    await queryInterface.dropTable('categories');
+  }
+};
\ No newline at end of file
diff --git a/migrations/20230405223808-create-categories-projects.js b/migrations/20230405223808-create-categories-projects.js
new file mode 100644
index 00000000..4e407a24
--- /dev/null
+++ b/migrations/20230405223808-create-categories-projects.js
@@ -0,0 +1,31 @@
+'use strict';
+/** @type {import('sequelize-cli').Migration} */
+module.exports = {
+  async up(queryInterface, Sequelize) {
+    await queryInterface.createTable('categoriesProjects', {
+      id: {
+        allowNull: false,
+        autoIncrement: true,
+        primaryKey: true,
+        type: Sequelize.INTEGER
+      },
+      categoryId: {
+        type: Sequelize.INTEGER
+      },
+      projectId: {
+        type: Sequelize.INTEGER
+      },
+      createdAt: {
+        allowNull: false,
+        type: Sequelize.DATE
+      },
+      updatedAt: {
+        allowNull: false,
+        type: Sequelize.DATE
+      }
+    });
+  },
+  async down(queryInterface, Sequelize) {
+    await queryInterface.dropTable('categoriesProjects');
+  }
+};
\ No newline at end of file
diff --git a/models/categoriesprojects.js b/models/categoriesprojects.js
new file mode 100644
index 00000000..ddb47da2
--- /dev/null
+++ b/models/categoriesprojects.js
@@ -0,0 +1,24 @@
+'use strict';
+const {
+  Model
+} = require('sequelize');
+module.exports = (sequelize, DataTypes) => {
+  class categoriesProjects extends Model {
+    /**
+     * Helper method for defining associations.
+     * This method is not a part of Sequelize lifecycle.
+     * The `models/index` file will call this method automatically.
+     */
+    static associate(models) {
+      // define association here
+    }
+  }
+  categoriesProjects.init({
+    categoryId: DataTypes.INTEGER,
+    projectId: DataTypes.INTEGER
+  }, {
+    sequelize,
+    modelName: 'categoriesProjects',
+  });
+  return categoriesProjects;
+};
\ No newline at end of file
diff --git a/models/category.js b/models/category.js
new file mode 100644
index 00000000..1221e7a2
--- /dev/null
+++ b/models/category.js
@@ -0,0 +1,27 @@
+"use strict";
+const { Model } = require("sequelize");
+module.exports = (sequelize, DataTypes) => {
+  class category extends Model {
+    /**
+     * Helper method for defining associations.
+     * This method is not a part of Sequelize lifecycle.
+     * The `models/index` file will call this method automatically.
+     */
+    static associate(models) {
+      // define association here
+      models.category.belongsToMany(models.project, {
+        through: "categoriesProjects",
+      });
+    }
+  }
+  category.init(
+    {
+      name: DataTypes.STRING,
+    },
+    {
+      sequelize,
+      modelName: "category",
+    }
+  );
+  return category;
+};
diff --git a/models/project.js b/models/project.js
index 735a0a47..e0396ae0 100644
--- a/models/project.js
+++ b/models/project.js
@@ -1,7 +1,5 @@
-'use strict';
-const {
-  Model
-} = require('sequelize');
+"use strict";
+const { Model } = require("sequelize");
 module.exports = (sequelize, DataTypes) => {
   class project extends Model {
     /**
@@ -11,24 +9,30 @@ module.exports = (sequelize, DataTypes) => {
      */
     static associate(models) {
       // define association here
+      models.project.belongsToMany(models.category, {
+        through: "categoriesProjects",
+      });
     }
   }
-  project.init({
-    githubLink: {
-      type: DataTypes.TEXT,
-      validate: { isUrl: true }
+  project.init(
+    {
+      githubLink: {
+        type: DataTypes.TEXT,
+        validate: { isUrl: true },
+      },
+      name: DataTypes.STRING,
+      deployLink: {
+        type: DataTypes.TEXT,
+        validate: { isUrl: true },
+      },
+      description: {
+        type: DataTypes.TEXT,
+      },
     },
-    name: DataTypes.STRING,
-    deployLink: {
-      type: DataTypes.TEXT,
-      validate: { isUrl: true }
-    },
-    description: {
-      type: DataTypes.TEXT
-    },
-  }, {
-    sequelize,
-    modelName: 'project',
-  });
+    {
+      sequelize,
+      modelName: "project",
+    }
+  );
   return project;
-};
\ No newline at end of file
+};
diff --git a/package.json b/package.json
index cbce809b..9dd406b4 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,9 @@
 {
   "name": "express-project-organizer",
   "version": "1.0.0",
+  "engines": {
+    "node": "18.15.0"
+  },
   "main": "index.js",
   "scripts": {
     "start": "node index.js"
diff --git a/views/categories/index.ejs b/views/categories/index.ejs
new file mode 100644
index 00000000..60bd5607
--- /dev/null
+++ b/views/categories/index.ejs
@@ -0,0 +1,11 @@
+<h1>Categories</h1>
+
+<% if (categories.length < 1) { %>
+<h4>Better get coding, I've no categories!</h4>
+<% } %> <% categories.forEach(function(category) { %>
+<div class="well">
+  <h2>
+    <a href="/categories/<%= category.id %>"><%= category.name %></a>
+  </h2>
+</div>
+<% }); %>
diff --git a/views/categories/show.ejs b/views/categories/show.ejs
new file mode 100644
index 00000000..c829eb53
--- /dev/null
+++ b/views/categories/show.ejs
@@ -0,0 +1,16 @@
+<h1>Category: <%= category.name %></h1>
+
+<h2>Projects that fall under this category</h2>
+
+<% projects.forEach(function(project) { %>
+  <div class="well">
+    <h2>
+      <a href="/projects/<%= project.id %>"><%= project.name %></a>
+    </h2>
+  </div>
+<% }); %>
+
+
+<hr />
+
+<a href="/">&larr; Back Home</a>
diff --git a/views/partials/navbar.ejs b/views/partials/navbar.ejs
index 081dee3b..64246a51 100644
--- a/views/partials/navbar.ejs
+++ b/views/partials/navbar.ejs
@@ -2,7 +2,12 @@
   <div class="container">
     <!-- Brand and toggle get grouped for better mobile display -->
     <div class="navbar-header">
-      <button type="button" class="navbar-toggle" data-toggle="collapse" data-target=".navbar-ex1-collapse">
+      <button
+        type="button"
+        class="navbar-toggle"
+        data-toggle="collapse"
+        data-target=".navbar-ex1-collapse"
+      >
         <span class="sr-only">Toggle navigation</span>
         <span class="icon-bar"></span>
         <span class="icon-bar"></span>
@@ -15,7 +20,9 @@
     <div class="collapse navbar-collapse navbar-ex1-collapse">
       <ul class="nav navbar-nav">
         <li><a href="/projects/new">New Project</a></li>
+        <li><a href="/categories/">Categories</a></li>
       </ul>
-    </div><!-- /.navbar-collapse -->
+    </div>
+    <!-- /.navbar-collapse -->
   </div>
 </nav>
diff --git a/views/projects/new.ejs b/views/projects/new.ejs
index 3342d3ee..9ac769d8 100644
--- a/views/projects/new.ejs
+++ b/views/projects/new.ejs
@@ -3,23 +3,52 @@
 <form action="/projects" method="POST">
   <div class="form-group">
     <label for="name">Name</label>
-    <input type="text" class="form-control" id="name" name="name" required>
+    <input type="text" class="form-control" id="name" name="name" required />
   </div>
 
   <div class="form-group">
     <label for="githubLink">Github Link</label>
-    <input type="text" class="form-control" id="githubLink" name="githubLink" required>
+    <input
+      type="text"
+      class="form-control"
+      id="githubLink"
+      name="githubLink"
+      required
+    />
   </div>
 
   <div class="form-group">
     <label for="deployedLink">Deployed Link</label>
-    <input type="text" class="form-control" id="deployedLink" name="deployedLink" required>
+    <input
+      type="text"
+      class="form-control"
+      id="deployedLink"
+      name="deployedLink"
+      required
+    />
+  </div>
+
+  <div class="form-group">
+    <label for="category">Category</label>
+    <input
+      type="text"
+      class="form-control"
+      id="category"
+      name="category"
+      required
+    />
   </div>
 
   <div class="form-group">
     <label for="description">Description</label>
-    <textarea type="text" class="form-control" id="description" name="description" required></textarea>
+    <textarea
+      type="text"
+      class="form-control"
+      id="description"
+      name="description"
+      required
+    ></textarea>
   </div>
 
-  <input type="submit" class="btn btn-primary">
+  <input type="submit" class="btn btn-primary" />
 </form>