diff --git a/Rakefile b/Rakefile
index ea80bd9..81e43e3 100644
--- a/Rakefile
+++ b/Rakefile
@@ -12,7 +12,7 @@ begin
       :email        => %q{jens.wille@gmail.com},
       :license      => %q{AGPL-3.0},
       :homepage     => :blackwinter,
-      :dependencies => %w[unicode] << ['ruby-nuggets', '>= 0.9.4']
+      :dependencies => %w[lsi4r unicode]
     }
   }}
 rescue LoadError => err
diff --git a/lib/pms/index.rb b/lib/pms/index.rb
index abd4917..3488617 100644
--- a/lib/pms/index.rb
+++ b/lib/pms/index.rb
@@ -85,7 +85,7 @@ def doc(doc_num)
 
     def build_index(options)
       if lsi = options[:lsi]
-        require 'nuggets/lsi'
+        require 'lsi4r'
 
         lsi = DEFAULT_LSI if lsi == true
         map = Hash.new { |h, k| h[k] = [] }
@@ -104,7 +104,7 @@ def build_index(options)
         }
       }
 
-      Nuggets::LSI.each_norm(map, :min => lsi, :new => true) { |d, k, _|
+      Lsi4R.each_norm(map, :min => lsi, :new => true) { |d, k, _|
         index[mangle_token(k)][d.key] << nil
       } if lsi
 
diff --git a/spec/pms_spec.rb b/spec/pms_spec.rb
index b130cb2..5dccc55 100644
--- a/spec/pms_spec.rb
+++ b/spec/pms_spec.rb
@@ -117,7 +117,7 @@
 
   it 'should find more ducks' do
     @pms1.search('ducks').results.should == [1]
-    @pms2.search('ducks').results.should == [1, 4, 5]
+    @pms2.search('ducks').results.should == [1, 4, 6]
   end
 
   it 'should not report positions for LSI terms' do