diff --git a/Gemfile b/Gemfile
index 1f208e3e..85127123 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,5 +1,6 @@
 # A sample Gemfile
 source "https://rubygems.org"
+ruby "1.8.7"
 
 gem "rack", "~> 1.1.0"
 gem "geokit", "~> 1.6.7"
diff --git a/Gemfile.lock b/Gemfile.lock
index 2495df11..28145b95 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -22,7 +22,7 @@ DEPENDENCIES
   fastercsv (~> 1.5.5)
   ferret (~> 0.11.8.5)
   geokit (~> 1.6.7)
-  google-v3-geocoder
+  google-v3-geocoder (~> 1.0.0)
   json (~> 1.8.1)
   mysql (~> 2.9.1)
   rack (~> 1.1.0)