diff --git a/README.rdoc b/README.rdoc
index 8377a52..7e4047a 100644
--- a/README.rdoc
+++ b/README.rdoc
@@ -17,8 +17,8 @@ This version is currently based off of mongo-0.20.1.
 
 As of mongo-0.19.1, there have been significant changes to GridFS.  I do
 not plan to support versions of the mongo driver prior to 0.19.  There are
-some compatibility issues with mongo-0.19 vs. mongo-0.20 (Mongo::ObjectID
-vs. BSON::ObjectID).  For now, I am choosing to support mongo-0.20.
+some compatibility issues with mongo-0.19 vs. mongo-0.20 (Mongo::ObjectId
+vs. BSON::ObjectId).  For now, I am choosing to support mongo-0.20.
 
 == Installation
 
diff --git a/Rakefile b/Rakefile
index ba5563c..1e020f3 100644
--- a/Rakefile
+++ b/Rakefile
@@ -10,10 +10,10 @@ begin
     gem.homepage          = "http://github.com/skinandbones/rack-gridfs"
     gem.authors           = ["Blake Carlson"]
     gem.rubyforge_project = "rack-gridfs"
-    
+
     gem.add_dependency('rack')
-    gem.add_dependency('mongo', '>= 1.0.1')
-    
+    gem.add_dependency('mongo', '>= 1.0.8')
+
     gem.add_development_dependency('mocha', '0.9.4')
     gem.add_development_dependency('rack-test')
     gem.add_development_dependency('shoulda')
diff --git a/lib/rack/gridfs.rb b/lib/rack/gridfs.rb
index 579ecd6..35807e9 100644
--- a/lib/rack/gridfs.rb
+++ b/lib/rack/gridfs.rb
@@ -41,7 +41,7 @@ def gridfs_request(id)
       grid = Mongo::GridFileSystem.new(db)
       file = grid.open(id, 'r')
       [200, {'Content-Type' => file.content_type}, [file.read]]
-    rescue Mongo::GridError, BSON::InvalidObjectID
+    rescue Mongo::GridError, BSON::InvalidObjectId
       [404, {'Content-Type' => 'text/plain'}, ['File not found.']]
     rescue Mongo::GridFileNotFound
       [404, {'Content-Type' => 'text/plain'}, ['File not found.']]
diff --git a/rack-gridfs.gemspec b/rack-gridfs.gemspec
index a38276a..d1e77ea 100644
--- a/rack-gridfs.gemspec
+++ b/rack-gridfs.gemspec
@@ -48,14 +48,14 @@ Gem::Specification.new do |s|
     if Gem::Version.new(Gem::RubyGemsVersion) >= Gem::Version.new('1.2.0') then
       s.add_runtime_dependency(%q<rack>, [">= 0"])
       s.add_runtime_dependency(%q<activesupport>, [">= 3.0.0"])
-      s.add_runtime_dependency(%q<mongo>, [">= 1.0.4"])
+      s.add_runtime_dependency(%q<mongo>, [">= 1.0.8"])
       s.add_development_dependency(%q<mocha>, ["= 0.9.4"])
       s.add_development_dependency(%q<rack-test>, [">= 0"])
       s.add_development_dependency(%q<thoughtbot-shoulda>, [">= 0"])
     else
       s.add_dependency(%q<rack>, [">= 0"])
       s.add_dependency(%q<activesupport>, [">= 3.0.0"])
-      s.add_dependency(%q<mongo>, [">= 1.0.4"])
+      s.add_dependency(%q<mongo>, [">= 1.0.8"])
       s.add_dependency(%q<mocha>, ["= 0.9.4"])
       s.add_dependency(%q<rack-test>, [">= 0"])
       s.add_dependency(%q<thoughtbot-shoulda>, [">= 0"])
@@ -63,7 +63,7 @@ Gem::Specification.new do |s|
   else
     s.add_dependency(%q<rack>, [">= 0"])
     s.add_dependency(%q<activesupport>, [">= 3.0.0"])
-    s.add_dependency(%q<mongo>, [">= 1.0.4"])
+    s.add_dependency(%q<mongo>, [">= 1.0.8"])
     s.add_dependency(%q<mocha>, ["= 0.9.4"])
     s.add_dependency(%q<rack-test>, [">= 0"])
     s.add_dependency(%q<thoughtbot-shoulda>, [">= 0"])