diff --git a/brakeman.gemspec b/brakeman.gemspec
index 94019b0d15084e45884a7af75b656c4e4871f6d7..475e3648ddcb601931bf3b462f84b20621260299 100644
--- a/brakeman.gemspec
+++ b/brakeman.gemspec
@@ -11,7 +11,7 @@ Gem::Specification.new do |s|
   s.executables = ["brakeman"]
   s.license = "MIT"
   s.add_dependency "ruby_parser", "~>3.1.1"
-  s.add_dependency "ruby2ruby", "2.0.3"
+  s.add_dependency "ruby2ruby", "~>2.0.5"
   s.add_dependency "terminal-table", "~>1.4"
   s.add_dependency "fastercsv", "~>1.5"
   s.add_dependency "highline", "~>1.6.19"
diff --git a/lib/brakeman/processors/output_processor.rb b/lib/brakeman/processors/output_processor.rb
index e4d042e5a6092351ef363a1c0b58a178ce142fc4..fa94b3fc09e3569542ee7654d32382f1f93749c5 100644
--- a/lib/brakeman/processors/output_processor.rb
+++ b/lib/brakeman/processors/output_processor.rb
@@ -14,7 +14,6 @@ class Brakeman::OutputProcessor < Ruby2Ruby
   end
 
   alias process_safely format
-  alias process_methdef process_defn
 
   def process exp
     begin
@@ -99,6 +98,29 @@ class Brakeman::OutputProcessor < Ruby2Ruby
     out
   end
 
+  def process_defn exp
+    # Copied from Ruby2Ruby except without the whole
+    # "convert methods to attr_*" stuff
+    name = exp.shift
+    args = process exp.shift
+    args = "" if args == "()"
+
+    exp.shift if exp == s(s(:nil)) # empty it out of a default nil expression
+
+    body = []
+    until exp.empty? do
+      body << indent(process(exp.shift))
+    end
+
+    body << indent("# do nothing") if body.empty?
+
+    body = body.join("\n")
+
+    return "def #{name}#{args}\n#{body}\nend".gsub(/\n\s*\n+/, "\n")
+  end
+
+  alias process_methdef process_defn
+
   def process_call_with_block exp
     call = process exp[0]
     block = process_rlist exp[2..-1]
diff --git a/test/test.rb b/test/test.rb
index 8dc70ae9f78092f488e3c741c4ae9001d369b9f0..046cfadcda29c9b5c949bf8f0260fcc597407738 100644
--- a/test/test.rb
+++ b/test/test.rb
@@ -191,7 +191,7 @@ module BrakemanTester::RescanTestHelper
     output = yield parsed
 
     File.open path, "w" do |f|
-      f.puts Ruby2Ruby.new.process output
+      f.puts Brakeman::OutputProcessor.new.process output
     end
   end
 
diff --git a/test/tests/output_processor.rb b/test/tests/output_processor.rb
index da65db6684f2586783aae447db948c55bd724303..a05ff352fc36b17c89e74af9031961bf348319f6 100644
--- a/test/tests/output_processor.rb
+++ b/test/tests/output_processor.rb
@@ -144,4 +144,21 @@ class OutputProcessorTests < Test::Unit::TestCase
                Sexp.new(:args),
                Sexp.new(:call, nil, :y))
   end
+
+  # Ruby2Ruby tries to convert some methods to attr_* calls,
+  # but it breaks some stuff because of how it accesses nodes.
+  # So we overwrite it.
+  def test_output_defn_not_attr
+    assert_output "def x\n  @x\nend",
+      Sexp.new(:defn,
+               :x,
+               Sexp.new(:args),
+               Sexp.new(:ivar, :@x))
+
+    assert_output "def x(y)\n  @x = (local y)\nend",
+      Sexp.new(:methdef,
+               :x,
+               Sexp.new(:args, :y),
+               Sexp.new(:iasgn, :@x, Sexp.new(:lvar, :y)))
+  end
 end