diff --git a/ruby-projects/sample_blog/Gemfile.lock b/ruby-projects/sample_blog/Gemfile.lock
index 6db32bd..6b78ea3 100644
--- a/ruby-projects/sample_blog/Gemfile.lock
+++ b/ruby-projects/sample_blog/Gemfile.lock
@@ -64,6 +64,7 @@ GEM
       padrino-core (= 0.12.4)
     padrino-support (0.12.4)
       activesupport (>= 3.1)
+    pg (1.4.1)
     polyglot (0.3.5)
     rack (1.5.2)
     rack-protection (1.5.3)
@@ -82,14 +83,13 @@ GEM
       rack (~> 1.4)
       rack-protection (~> 1.4)
       tilt (~> 1.3, >= 1.3.4)
-    sqlite3 (1.3.10)
     thor (0.19.1)
-    thread_safe (0.3.4)
+    thread_safe (0.3.6)
     tilt (1.4.1)
     treetop (1.4.15)
       polyglot
       polyglot (>= 0.3.1)
-    tzinfo (1.2.2)
+    tzinfo (1.2.10)
       thread_safe (~> 0.1)
     url_mount (0.2.1)
       rack
@@ -102,8 +102,8 @@ DEPENDENCIES
   bcrypt
   haml
   padrino (= 0.12.4)
+  pg
   rack-test
   rake
   sass
   shoulda
-  sqlite3