diff --git a/Gemfile.lock b/Gemfile.lock
index c385ab0..aaec3b4 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,8 +1,9 @@
 PATH
   remote: .
   specs:
-    ronn-ng (0.9.1)
+    ronn-ng (0.10.0.pre.SNAPSHOT)
       kramdown (~> 2.1)
+      kramdown-parser-gfm (~> 1.0.1)
       mustache (~> 1.0)
       nokogiri (~> 1.9, >= 1.9.0)
 
@@ -12,6 +13,8 @@ GEM
     ast (2.4.1)
     kramdown (2.3.0)
       rexml
+    kramdown-parser-gfm (1.0.1)
+      kramdown (~> 2.0)
     mini_portile2 (2.4.0)
     mustache (1.1.1)
     mustermann (1.1.1)
diff --git a/lib/ronn.rb b/lib/ronn.rb
index 6e2c4be..781a01c 100755
--- a/lib/ronn.rb
+++ b/lib/ronn.rb
@@ -42,6 +42,6 @@ def self.revision
   # value generated by: rake rev
   # or edit manually; I'm not sure of how rake rev interacts with git
   # tags -apjanke
-  REV = '0.9.1'.freeze
+  REV = '0.10.0-SNAPSHOT'.freeze
   VERSION = version
 end
diff --git a/lib/ronn/document.rb b/lib/ronn/document.rb
index bc6ecf5..fbf36cc 100644
--- a/lib/ronn/document.rb
+++ b/lib/ronn/document.rb
@@ -312,7 +312,11 @@ def preprocess!
     end
 
     def input_html
-      @input_html ||= strip_heading(Kramdown::Document.new(markdown, auto_ids: false,
+      @input_html ||= strip_heading(Kramdown::Document.new(markdown,
+        auto_ids: false,
+        input: 'GFM',
+        hard_wrap: 'false',
+        syntax_highlighter_opts: 'line_numbers: false',
         smart_quotes: ['apos', 'apos', 'quot', 'quot'],
         typographic_symbols: { hellip: '...', ndash: '--', mdash: '--' }).to_html)
     end
diff --git a/ronn-ng.gemspec b/ronn-ng.gemspec
index a476c70..188faf0 100644
--- a/ronn-ng.gemspec
+++ b/ronn-ng.gemspec
@@ -1,7 +1,7 @@
 Gem::Specification.new do |s|
   s.name = 'ronn-ng'
-  s.version = '0.9.1'
-  s.date = '2020-04-09'
+  s.version = '0.10.0-SNAPSHOT'
+  s.date = '2020-07-13'
 
   s.summary     = 'Builds man pages from Markdown'
   s.description = 'Ronn-NG builds manuals in HTML and Unix man page format from Markdown.'
@@ -110,9 +110,10 @@ Gem::Specification.new do |s|
   s.test_files = s.files.select { |path| path =~ /^test\/.*_test.rb/ }
 
   s.extra_rdoc_files = %w[LICENSE.txt AUTHORS]
-  s.add_dependency 'kramdown',    '~> 2.1'
-  s.add_dependency 'mustache',    '~> 1.0'
-  s.add_dependency 'nokogiri',    '~> 1.9', '>= 1.9.0'
+  s.add_dependency 'kramdown',              '~> 2.1'
+  s.add_dependency 'kramdown-parser-gfm',   '~> 1.0.1'
+  s.add_dependency 'mustache',              '~> 1.0'
+  s.add_dependency 'nokogiri',              '~> 1.9', '>= 1.9.0'
   s.add_development_dependency 'rack',      '~> 2.0',  '>= 2.0.6'
   s.add_development_dependency 'rake',      '~> 12.3', '>= 12.3.0'
   s.add_development_dependency 'rubocop',   '~> 0.60', '>= 0.57.1'