diff --git a/Gemfile b/Gemfile
index ddf0ec8..242a70d 100644
--- a/Gemfile
+++ b/Gemfile
@@ -6,6 +6,7 @@ gem 'rails-api'
 gem 'active_model_serializers', '~> 0.10.0'
 gem 'rack-cors', require: 'rack/cors'
 gem 'rb-readline'
+gem 'pg'
 gem 'bcrypt', '~> 3.1.11'
 
 group :production do
diff --git a/Gemfile.lock b/Gemfile.lock
index c0b9b1f..46fef95 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -72,6 +72,7 @@ GEM
     nokogiri (1.6.8)
       mini_portile2 (~> 2.1.0)
       pkg-config (~> 1.1.7)
+    pg (0.18.4)
     pkg-config (1.1.7)
     pry (0.10.4)
       coderay (~> 1.1.0)
@@ -165,6 +166,7 @@ DEPENDENCIES
   bcrypt (~> 3.1.11)
   byebug (~> 8.2.2)
   dotenv-rails (~> 2.1, >= 2.1.1)
+  pg
   pry (~> 0.10.3)
   pry-byebug (~> 3.3.0)
   pry-rails (~> 0.3.4)
diff --git a/README.md b/README.md
index cbd3759..e970b8e 100644
--- a/README.md
+++ b/README.md
@@ -72,7 +72,7 @@ correspond to API actions.
 Request:
 
 ```sh
-curl --include --request POST http://localhost:3000/sign-up \
+curl --include --request POST http://localhost:4741/sign-up \
   --header "Content-Type: application/json" \
   --data '{
     "credentials": {
@@ -106,7 +106,7 @@ Content-Type: application/json; charset=utf-8
 Request:
 
 ```sh
-curl --include --request POST http://localhost:3000/sign-in \
+curl --include --request POST http://localhost:4741/sign-in \
   --header "Content-Type: application/json" \
   --data '{
     "credentials": {
@@ -140,7 +140,7 @@ Content-Type: application/json; charset=utf-8
 Request:
 
 ```sh
-curl --include --request PATCH http://localhost:3000/change-password/$ID \
+curl --include --request PATCH http://localhost:4741/change-password/$ID \
   --header "Authorization: Token token=$TOKEN" \
   --header "Content-Type: application/json" \
   --data '{
@@ -166,7 +166,7 @@ HTTP/1.1 204 No Content
 Request:
 
 ```sh
-curl --include --request DELETE http://localhost:3000/sign-out/$ID \
+curl --include --request DELETE http://localhost:4741/sign-out/$ID \
   --header "Authorization: Token token=$TOKEN"
 ```
 
@@ -192,7 +192,7 @@ HTTP/1.1 204 No Content
 Request:
 
 ```sh
-curl --include --request GET http://localhost:3000/users \
+curl --include --request GET http://localhost:4741/users \
   --header "Authorization: Token token=$TOKEN"
 ```
 
@@ -225,7 +225,7 @@ Content-Type: application/json; charset=utf-8
 Request:
 
 ```sh
-curl --include --request GET http://localhost:3000/users/$ID \
+curl --include --request GET http://localhost:4741/users/$ID \
   --header "Authorization: Token token=$TOKEN"
 ```
 
diff --git a/config/boot.rb b/config/boot.rb
index 6b750f0..1dd5cd6 100644
--- a/config/boot.rb
+++ b/config/boot.rb
@@ -1,3 +1,15 @@
 ENV['BUNDLE_GEMFILE'] ||= File.expand_path('../../Gemfile', __FILE__)
 
 require 'bundler/setup' # Set up gems listed in the Gemfile.
+
+# added to change default development port
+require 'rails/commands/server'
+
+module DefaultOptions
+  DEV_PORT = 'GA'.each_byte.reduce('') { |a, e| a + format('%x', e) }.to_i
+  def default_options
+    super.merge(Port: DEV_PORT)
+  end
+end
+
+Rails::Server.send(:prepend, DefaultOptions)
diff --git a/scripts/change-password.sh b/scripts/change-password.sh
index eedcadc..8f704c7 100755
--- a/scripts/change-password.sh
+++ b/scripts/change-password.sh
@@ -1,6 +1,6 @@
 #!/bin/bash
 
-curl --include --request PATCH http://localhost:3000/change-password/$ID \
+curl --include --request PATCH http://localhost:4741/change-password/$ID \
   --header "Authorization: Token token=$TOKEN" \
   --header "Content-Type: application/json" \
   --data '{
diff --git a/scripts/sign-in.sh b/scripts/sign-in.sh
index 34c6b99..4602b0a 100755
--- a/scripts/sign-in.sh
+++ b/scripts/sign-in.sh
@@ -1,6 +1,6 @@
 #!/bin/bash
 
-curl --include --request POST http://localhost:3000/sign-in \
+curl --include --request POST http://localhost:4741/sign-in \
   --header "Content-Type: application/json" \
   --data '{
     "credentials": {
diff --git a/scripts/sign-out.sh b/scripts/sign-out.sh
index 4f74c84..dc2de94 100755
--- a/scripts/sign-out.sh
+++ b/scripts/sign-out.sh
@@ -1,4 +1,4 @@
 #!/bin/bash
 
-curl --include --request DELETE http://localhost:3000/sign-out/$ID \
+curl --include --request DELETE http://localhost:4741/sign-out/$ID \
   --header "Authorization: Token token=$TOKEN"
diff --git a/scripts/sign-up.sh b/scripts/sign-up.sh
index a9ea773..2ada65f 100755
--- a/scripts/sign-up.sh
+++ b/scripts/sign-up.sh
@@ -1,6 +1,6 @@
 #!/bin/bash
 
-curl --include --request POST http://localhost:3000/sign-up \
+curl --include --request POST http://localhost:4741/sign-up \
   --header "Content-Type: application/json" \
   --data '{
     "credentials": {
@@ -10,7 +10,7 @@ curl --include --request POST http://localhost:3000/sign-up \
     }
   }'
 
-curl --include --request POST http://localhost:3000/sign-up \
+curl --include --request POST http://localhost:4741/sign-up \
   --header "Content-Type: application/json" \
   --data '{
     "credentials": {
diff --git a/scripts/user.sh b/scripts/user.sh
index 589a0b6..191b7d7 100755
--- a/scripts/user.sh
+++ b/scripts/user.sh
@@ -1,4 +1,4 @@
 #!/bin/bash
 
-curl --include --request GET http://localhost:3000/users/$ID \
+curl --include --request GET http://localhost:4741/users/$ID \
   --header "Authorization: Token token=$TOKEN"
diff --git a/scripts/users.sh b/scripts/users.sh
index 84b7d79..5790b02 100755
--- a/scripts/users.sh
+++ b/scripts/users.sh
@@ -1,4 +1,4 @@
 #!/bin/bash
 
-curl --include --request GET http://localhost:3000/users \
+curl --include --request GET http://localhost:4741/users \
   --header "Authorization: Token token=$TOKEN"