diff --git a/Gemfile b/Gemfile
index 6b052ff82d..55166cf886 100644
--- a/Gemfile
+++ b/Gemfile
@@ -197,7 +197,7 @@ platforms :mri, :mingw do
   end
 
   group :postgres do
-    gem 'pg'
+    gem 'pg', "~> 0.17.1"
   end
 
   group :sqlite do
diff --git a/Gemfile.lock b/Gemfile.lock
index d3f7cf2665..844cdc0678 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -191,7 +191,7 @@ GEM
     paper_trail (2.7.2)
       activerecord (~> 3.0)
       railties (~> 3.0)
-    pg (0.15.1)
+    pg (0.17.1)
     polyglot (0.3.3)
     prototype-rails (3.2.1)
       rails (~> 3.2)
@@ -390,7 +390,7 @@ DEPENDENCIES
   net-ldap (~> 0.2.2)
   object-daddy (~> 1.1.0)
   oj
-  pg
+  pg (~> 0.17.1)
   prototype-rails
   prototype_legacy_helper (= 0.0.0)!
   pry-byebug
diff --git a/doc/CHANGELOG.md b/doc/CHANGELOG.md
index 98463fd3c3..0b008364ce 100644
--- a/doc/CHANGELOG.md
+++ b/doc/CHANGELOG.md
@@ -36,6 +36,7 @@ See doc/COPYRIGHT.rdoc for more details.
 * `#4090` 'Session Expires' setting breaks API
 * News subject contained in URL
 * Removes mocha mocking framework.
+* Update pg-gem version
 
 ## 3.0.0pre44