diff --git a/lib/juicer/dependency_resolver/css_dependency_resolver.rb b/lib/juicer/dependency_resolver/css_dependency_resolver.rb
index 985fd1c..faddad2 100644
--- a/lib/juicer/dependency_resolver/css_dependency_resolver.rb
+++ b/lib/juicer/dependency_resolver/css_dependency_resolver.rb
@@ -12,7 +12,7 @@ class CssDependencyResolver < DependencyResolver
 
     private
     def parse(line, imported_file = nil)
-      return $2 if line =~ @@import_pattern
+      return $2 if encoded_line(line) =~ @@import_pattern
 
       # At first sight of actual CSS rules we abort (TODO: This does not take
       # into account the fact that rules may be commented out and that more
diff --git a/lib/juicer/dependency_resolver/dependency_resolver.rb b/lib/juicer/dependency_resolver/dependency_resolver.rb
index 6cc55d3..7e5dfbf 100644
--- a/lib/juicer/dependency_resolver/dependency_resolver.rb
+++ b/lib/juicer/dependency_resolver/dependency_resolver.rb
@@ -58,6 +58,14 @@ def extension
       raise NotImplementedError.new
     end
 
+    def encoded_line(line)
+      if String.method_defined?(:encode)
+        line.encode!('UTF-8', 'UTF-8', :invalid => :replace)
+      else
+        line
+      end
+    end
+
     #
     # Carries out the actual work of resolve. resolve resets the internal
     # file list and yields control to _resolve for rebuilding the file list.
diff --git a/lib/juicer/dependency_resolver/javascript_dependency_resolver.rb b/lib/juicer/dependency_resolver/javascript_dependency_resolver.rb
index 21c2e1e..5fbb9b4 100644
--- a/lib/juicer/dependency_resolver/javascript_dependency_resolver.rb
+++ b/lib/juicer/dependency_resolver/javascript_dependency_resolver.rb
@@ -9,7 +9,7 @@ class JavaScriptDependencyResolver < DependencyResolver
 
     private
     def parse(line, imported_file = nil)
-      return $1 if line =~ @@depends_pattern
+      return $1 if encoded_line(line) =~ @@depends_pattern
 
       # If we have already skimmed through some @depend/@depends or a
       # closing comment we're done.
diff --git a/test/unit/juicer/dependency_resolver/css_dependency_resolver_test.rb b/test/unit/juicer/dependency_resolver/css_dependency_resolver_test.rb
index 7ecdd9c..9fef12c 100644
--- a/test/unit/juicer/dependency_resolver/css_dependency_resolver_test.rb
+++ b/test/unit/juicer/dependency_resolver/css_dependency_resolver_test.rb
@@ -1,3 +1,4 @@
+# encoding: utf-8
 require "test_helper"
 
 class TestCssDependencyResolver < Test::Unit::TestCase
@@ -33,4 +34,12 @@ def test_load_order
     files = @resolver.resolve(path("a1.css")).collect { |file| file.split("/").pop }
     assert_equal "d1.cssb1.cssc1.cssa1.css", files.join
   end
+
+  def test_parse
+    text = "© Dynamic Drive"
+    text.force_encoding("us-ascii") if RUBY_VERSION > "1.9"
+    assert_nothing_raised ArgumentError do
+      @resolver.send(:parse, text)
+    end
+  end
 end
diff --git a/test/unit/juicer/dependency_resolver/javascript_dependency_resolver_test.rb b/test/unit/juicer/dependency_resolver/javascript_dependency_resolver_test.rb
index 88e92d6..19d2b1c 100644
--- a/test/unit/juicer/dependency_resolver/javascript_dependency_resolver_test.rb
+++ b/test/unit/juicer/dependency_resolver/javascript_dependency_resolver_test.rb
@@ -1,3 +1,4 @@
+# encoding: utf-8
 require "test_helper"
 
 class TestJavaScriptDependencyResolver < Test::Unit::TestCase
@@ -47,4 +48,12 @@ def test_directory_resolve
     actual_files = @resolver.resolve(my_app)
     assert_equal expected_files, actual_files
   end
+
+  def test_parse
+    text = "© Dynamic Drive"
+    text.force_encoding("us-ascii") if RUBY_VERSION > "1.9"
+    assert_nothing_raised ArgumentError do
+      @resolver.send(:parse, text)
+    end
+  end
 end