We need an older version of the pg gem

Capfile

@@ -4,6 +4,9 @@ require 'capistrano/setup'
 # Include default deployment tasks
 require 'capistrano/deploy'
 
+require "capistrano/scm/git"
+install_plugin Capistrano::SCM::Git
+
 # Include tasks from other gems included in your Gemfile
 #
 # For documentation on these, see for example:

Gemfile

@@ -3,7 +3,7 @@ source 'https://rubygems.org'
 gem 'rails', '~> 4.2.11'
 
 gem 'sqlite3', '~> 1.3.6'
-gem 'pg'
+gem 'pg', '~> 0.15'
 
 gem 'sass-rails'
 

Gemfile.lock

@@ -219,9 +219,7 @@ GEM
     orm_adapter (0.5.0)
     parser (2.6.2.1)
       ast (~> 2.4.0)
-    pg (1.1.4)
-      activesupport (>= 3.0)
-      phony (> 2.15)
+    pg (0.21.0)
     phony (2.15.49)
     phony_rails (0.14.11)
       activesupport (>= 3.0)
@@ -431,7 +429,7 @@ DEPENDENCIES
   mini_racer
   morrisjs-rails
   nested_form
-  pg
+  pg (~> 0.15)
   phony (~> 2.15.11)
   phony_rails
   pry-rails

config/deploy.rb

@@ -1,5 +1,5 @@
 # config valid only for current version of Capistrano
-lock '3.6.1'
+lock '3.11.0'
 
 set :application, 'clarion'
 set :repo_url, 'https://github.com/ignisf/clarion.git'