diff --git a/Rakefile b/Rakefile
index 41ecf2c..bc21302 100644
--- a/Rakefile
+++ b/Rakefile
@@ -47,7 +47,7 @@ task compare: :compile do
   table << %w[--- --- --- --- --- ---]
   jarow = FuzzyStringMatch::JaroWinkler.create(:native)
   @ary.each do |str_1, str_2|
-    table << ["\"#{str_1}\"", "\"#{str_2}\"", JaroWinkler.distance(str_1, str_2).round(4), jarow.getDistance(str_1, str_2).round(4), Hotwater.jaro_winkler_distance(str_1, str_2).round(4), Amatch::Jaro.new(str_1).match(str_2).round(4)]
+    table << ["\"#{str_1}\"", "\"#{str_2}\"", JaroWinkler.similarity(str_1, str_2).round(4), jarow.getDistance(str_1, str_2).round(4), Hotwater.jaro_winkler_distance(str_1, str_2).round(4), Amatch::Jaro.new(str_1).match(str_2).round(4)]
   end
   col_len = []
   table.first.length.times{ |i| col_len << table.map{ |row| row[i].to_s.length }.max }
diff --git a/benchmark/measure.rb b/benchmark/measure.rb
index ebec236..193d619 100644
--- a/benchmark/measure.rb
+++ b/benchmark/measure.rb
@@ -28,8 +28,8 @@
 end
 
 if version >= Gem::Version.new('1.4.0')
-  jobs[:ascii] = -> { n.times { SAMPLES[:ascii].each { |str1, str2| JaroWinkler.distance(str1, str2) } } }
-  jobs[:utf8] = -> { n.times { SAMPLES[:utf8].each { |str1, str2| JaroWinkler.distance(str1, str2) } } }
+  jobs[:ascii] = -> { n.times { SAMPLES[:ascii].each { |str1, str2| JaroWinkler.similarity(str1, str2) } } }
+  jobs[:utf8] = -> { n.times { SAMPLES[:utf8].each { |str1, str2| JaroWinkler.similarity(str1, str2) } } }
 end
 
 # rehearsal
diff --git a/benchmark/native.rb b/benchmark/native.rb
index ddaa5ce..5fc2ea5 100644
--- a/benchmark/native.rb
+++ b/benchmark/native.rb
@@ -11,7 +11,7 @@
 
 Benchmark.bmbm do |x|
   x.report "jaro_winkler (#{`git rev-parse --short HEAD`.chop!})" do
-    n.times { SAMPLES[:ascii].each { |str1, str2| JaroWinkler.distance(str1, str2) } }
+    n.times { SAMPLES[:ascii].each { |str1, str2| JaroWinkler.similarity(str1, str2) } }
   end
 
   x.report gem_name_with_version('fuzzy-string-match') do
diff --git a/benchmark/pure.rb b/benchmark/pure.rb
index 91002d5..0916511 100644
--- a/benchmark/pure.rb
+++ b/benchmark/pure.rb
@@ -9,7 +9,7 @@
 
 Benchmark.bmbm do |x|
   x.report "jaro_winkler (#{`git rev-parse --short HEAD`.chop!})" do
-    n.times { SAMPLES[:ascii].each { |str1, str2| JaroWinkler.distance(str1, str2) } }
+    n.times { SAMPLES[:ascii].each { |str1, str2| JaroWinkler.similarity(str1, str2) } }
   end
 
   x.report gem_name_with_version('fuzzy-string-match') do