diff --git a/lib/jekyll/utils.rb b/lib/jekyll/utils.rb
index ce9800df..24c5b832 100644
--- a/lib/jekyll/utils.rb
+++ b/lib/jekyll/utils.rb
@@ -6,10 +6,11 @@ module Jekyll
     autoload :Ansi, "jekyll/utils/ansi"
 
     # Constants for use in #slugify
-    SLUGIFY_MODES = %w(raw default pretty).freeze
+    SLUGIFY_MODES = %w(raw default pretty ascii).freeze
     SLUGIFY_RAW_REGEXP = Regexp.new('\\s+').freeze
     SLUGIFY_DEFAULT_REGEXP = Regexp.new("[^[:alnum:]]+").freeze
     SLUGIFY_PRETTY_REGEXP = Regexp.new("[^[:alnum:]._~!$&'()+,;=@]+").freeze
+    SLUGIFY_ASCII_REGEXP = Regexp.new("[^[A-Za-z0-9]]+").freeze
 
     # Takes an indented string and removes the preceding spaces on each line
 
@@ -160,6 +161,9 @@ module Jekyll
     # When mode is "pretty", some non-alphabetic characters (._~!$&'()+,;=@)
     # are not replaced with hyphen.
     #
+    # When mode is "ascii", some everything else except ASCII characters
+    # a-z (lowercase), A-Z (uppercase) and 0-9 (numbers) are not replaced with hyphen.
+    #
     # If cased is true, all uppercase letters in the result string are
     # replaced with their lowercase counterparts.
     #
@@ -173,6 +177,9 @@ module Jekyll
     #   slugify("The _config.yml file", "pretty", true)
     #   # => "The-_config.yml file"
     #
+    #   slugify("The _config.yml file", "ascii")
+    #   # => "the-config.yml-file"
+    #
     # Returns the slugified string.
     def slugify(string, mode: nil, cased: false)
       mode ||= "default"
@@ -193,6 +200,11 @@ module Jekyll
           # "._~!$&'()+,;=@" is human readable (not URI-escaped) in URL
           # and is allowed in both extN and NTFS.
           SLUGIFY_PRETTY_REGEXP
+        when 'ascii'
+          # For web servers not being able to handle Unicode, the safe
+          # method is to ditch anything else but latin letters and numeric
+          # digits.
+          SLUGIFY_ASCII_REGEXP
         end
 
       # Strip according to the mode
diff --git a/test/test_utils.rb b/test/test_utils.rb
index 7fab0d55..d2cc60ff 100644
--- a/test/test_utils.rb
+++ b/test/test_utils.rb
@@ -198,6 +198,10 @@ class TestUtils < JekyllUnitTest
       )
     end
 
+    should "replace everything else but ASCII characters" do
+      assert_equal "the-config-yml-file", Utils.slugify("The _config.yml file?", mode: "ascii")
+    end
+
     should "only replace whitespace if mode is raw" do
       assert_equal(
         "the-_config.yml-file?",