diff --git a/.gitignore b/.gitignore
index d0cd323..20c473a 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,4 @@
 node_modules
 test/fixtures/*/build/*
-.DS_Store
\ No newline at end of file
+.DS_Store
+*.log
diff --git a/lib/index.js b/lib/index.js
index 0049d08..71bcfe3 100644
--- a/lib/index.js
+++ b/lib/index.js
@@ -6,6 +6,8 @@ var extname = require('path').extname;
 var join = require('path').join;
 var markdownIt = require('markdown-it');
 var minimatch = require('minimatch');
+var multimatch = require('multimatch');
+var _ = require('deepdash')(require('lodash'));
 
 /**
  * Expose `plugin`.
@@ -44,7 +46,7 @@ function plugin(preset, options){
 
   if (pluginOpts) {
     // merge defaults with supplied options
-    for (var prop in pluginOpts) { 
+    for (var prop in pluginOpts) {
       pluginOptions[prop] = pluginOpts[prop];
     }
   }
@@ -68,12 +70,15 @@ function plugin(preset, options){
       }
 
       debug('converting file: %s', file);
-      pluginOptions.fields.forEach(function(field){
-        debug('- checking field: %s', field);
-        if (!data[field]) return
-        debug('- converting field: %s', field);
-        var str = markdown.render(data[field].toString(), env);
-        data[field] = new Buffer(str);
+      all_paths = _.paths(data ,{ leavesOnly: false });
+      fields_path = multimatch(all_paths, pluginOptions.fields, {matchBase: true });
+      debug('- searching for the fields: %s',  pluginOptions.fields);
+      debug('- fields found to convert: %s', fields_path);
+
+      fields_path.forEach(function(path){
+          debug('- converting field: %s', path);
+          var str = markdown.render(_.get(data, path).toString(), env);
+          _.set(data, path, new Buffer(str));
       })
 
       delete files[file];
@@ -104,4 +109,4 @@ function plugin(preset, options){
   }
 
   return plugin;
-}
\ No newline at end of file
+}
diff --git a/package.json b/package.json
index 2927968..2e68ed6 100644
--- a/package.json
+++ b/package.json
@@ -6,12 +6,13 @@
   "license": "MIT",
   "main": "lib/index.js",
   "dependencies": {
-    "debug": "^3.2.6",
+    "debug": "^4.1.1",
+    "deepdash": "^3.1.3",
     "markdown-it": "^8.4.2",
-    "minimatch": "^3.0.4"
+    "multimatch": "^4.0.0"
   },
   "devDependencies": {
-    "mocha": "5.x",
+    "mocha": "6.x",
     "metalsmith": "2.x",
     "assert-dir-equal": "1.x",
     "markdown-it-abbr": "^1.0.4"
diff --git a/test/fixtures/plugin-options-multisubfield/expected/index.htm b/test/fixtures/plugin-options-multisubfield/expected/index.htm
new file mode 100644
index 0000000..67dd1d5
--- /dev/null
+++ b/test/fixtures/plugin-options-multisubfield/expected/index.htm
@@ -0,0 +1,6 @@
+<h1>A Markdown Post</h1>
+<p>With some &quot;amazing&quot;, <em>riveting</em>, <strong>coooonnnntent</strong>.</p>
+
+<p>The excerpt has <strong>bold</strong> text in it!</p>
+<p>Another <strong>bold</strong> text !</p>
+<p>This is the submain.subfield Text mith <strong>markdown</strong>!</p>
diff --git a/test/fixtures/plugin-options-multisubfield/src/index.html b/test/fixtures/plugin-options-multisubfield/src/index.html
new file mode 100644
index 0000000..77b29ce
--- /dev/null
+++ b/test/fixtures/plugin-options-multisubfield/src/index.html
@@ -0,0 +1,14 @@
+---
+title: Test
+excerpt:
+-
+  subfield: "The excerpt has **bold** text in it!"
+-
+  subfield: "Another **bold** text !"
+main:
+  submain:
+    subfield: "This is the submain.subfield Text mith **markdown**!"
+---
+# A Markdown Post
+
+With some "amazing", _riveting_, **coooonnnntent**.
diff --git a/test/fixtures/plugin-options-subfield/expected/index.htm b/test/fixtures/plugin-options-subfield/expected/index.htm
new file mode 100644
index 0000000..886c6cf
--- /dev/null
+++ b/test/fixtures/plugin-options-subfield/expected/index.htm
@@ -0,0 +1,4 @@
+<h1>A Markdown Post</h1>
+<p>With some &quot;amazing&quot;, <em>riveting</em>, <strong>coooonnnntent</strong>.</p>
+
+<p>The excerpt has <strong>bold</strong> text in it!</p>
diff --git a/test/fixtures/plugin-options-subfield/src/index.html b/test/fixtures/plugin-options-subfield/src/index.html
new file mode 100644
index 0000000..3f6f6b0
--- /dev/null
+++ b/test/fixtures/plugin-options-subfield/src/index.html
@@ -0,0 +1,8 @@
+---
+title: Test
+excerpt:
+  subfield: "The excerpt has **bold** text in it!"
+---
+# A Markdown Post
+
+With some "amazing", _riveting_, **coooonnnntent**.
diff --git a/test/index.js b/test/index.js
index 3faf69b..06c20a2 100644
--- a/test/index.js
+++ b/test/index.js
@@ -10,7 +10,9 @@ describe('metalsmith-markdown', function(){
       .use(markdown())
       .build(function(err){
         if (err) return done(err);
-        equal('test/fixtures/basic/expected', 'test/fixtures/basic/build');
+        assert.doesNotThrow(function(){
+          equal('test/fixtures/basic/build', 'test/fixtures/basic/expected');
+        });
         done();
       });
   });
@@ -20,7 +22,9 @@ describe('metalsmith-markdown', function(){
       .use(markdown('default'))
       .build(function(err){
         if (err) return done(err);
-        equal('test/fixtures/preset/expected', 'test/fixtures/preset/build');
+        assert.doesNotThrow(function(){
+          equal('test/fixtures/preset/build', 'test/fixtures/preset/expected');
+        });
         done();
       });
   });
@@ -30,7 +34,9 @@ describe('metalsmith-markdown', function(){
       .use(markdown({ html: true }))
       .build(function(err){
         if (err) return done(err);
-        equal('test/fixtures/options/expected', 'test/fixtures/options/build');
+        assert.doesNotThrow(function(){
+          equal('test/fixtures/options/build', 'test/fixtures/options/expected');
+        });
         done();
       });
   });
@@ -40,7 +46,9 @@ describe('metalsmith-markdown', function(){
       .use(markdown('default', { typographer: true }))
       .build(function(err){
         if (err) return done(err);
-        equal('test/fixtures/combo/expected', 'test/fixtures/combo/build');
+        assert.doesNotThrow(function(){
+          equal('test/fixtures/combo/build', 'test/fixtures/combo/expected');
+        });
         done();
       });
   });
@@ -53,7 +61,9 @@ describe('metalsmith-markdown', function(){
       .use(md)
       .build(function(err){
         if (err) return done(err);
-        equal('test/fixtures/parser/expected', 'test/fixtures/parser/build');
+        assert.doesNotThrow(function(){
+          equal('test/fixtures/parser/build', 'test/fixtures/parser/expected');
+        });
         done();
       });
   });
@@ -63,7 +73,9 @@ describe('metalsmith-markdown', function(){
       .use(markdown('zero').enable('emphasis'))
       .build(function(err){
         if (err) return done(err);
-        equal('test/fixtures/parser/expected', 'test/fixtures/parser/build');
+        assert.doesNotThrow(function(){
+          equal('test/fixtures/parser/build', 'test/fixtures/parser/expected');
+        });
         done();
       });
   });
@@ -75,7 +87,9 @@ describe('metalsmith-markdown', function(){
       .use(md)
       .build(function(err){
         if (err) return done(err);
-        equal('test/fixtures/plugin/expected', 'test/fixtures/plugin/build');
+        assert.doesNotThrow(function(){
+          equal('test/fixtures/plugin/build', 'test/fixtures/plugin/expected');
+        });
         done()
       });
   });
@@ -85,7 +99,9 @@ describe('metalsmith-markdown', function(){
       .use(markdown('default').use(require('markdown-it-abbr')))
       .build(function(err){
         if (err) return done(err);
-        equal('test/fixtures/plugin/expected', 'test/fixtures/plugin/build');
+        assert.doesNotThrow(function(){
+          equal('test/fixtures/plugin/build', 'test/fixtures/plugin/expected');
+        });
         done();
       });
   });
@@ -120,7 +136,9 @@ describe('metalsmith-markdown', function(){
            }))
       .build(function(err){
         if (err) return done(err);
-        equal('test/fixtures/env-plugin/expected', 'test/fixtures/env-plugin/build');
+        assert.doesNotThrow(function(){
+          equal('test/fixtures/env-plugin/build', 'test/fixtures/env-plugin/expected');
+        });
         done();
       })
   })
@@ -142,7 +160,9 @@ describe('metalsmith-markdown', function(){
       })
       .build(function(err){
         if (err) return done(err);
-        equal('test/fixtures/plugin-options/expected', 'test/fixtures/plugin-options/build');
+        assert.doesNotThrow(function(){
+          equal('test/fixtures/plugin-options/build', 'test/fixtures/plugin-options/expected');
+        });
         done();
       });
   });
@@ -164,7 +184,57 @@ describe('metalsmith-markdown', function(){
       })
       .build(function(err){
         if (err) return done(err);
-        equal('test/fixtures/plugin-options-preset/expected', 'test/fixtures/plugin-options/build');
+        assert.doesNotThrow(function(){
+          equal('test/fixtures/plugin-options-preset/build', 'test/fixtures/plugin-options/expected');
+        });
+        done();
+      });
+  });
+
+  it('should accept plugin options for subfields', function(done){
+    Metalsmith('test/fixtures/plugin-options-subfield')
+      .use(markdown({
+        plugin: {
+          pattern: '**/*.html',
+          fields: ['contents', 'excerpt.subfield'],
+          extension: 'htm'
+        }
+      }))
+      .use(function(files, metalsmith, done){
+        var f = files['index.htm'];
+        // concat the excerpt into the main content
+        f.contents = f.contents.toString() + '\n' + f.excerpt.subfield.toString()
+        done()
+      })
+      .build(function(err){
+        if (err) return done(err);
+        assert.doesNotThrow(function(){
+          equal('test/fixtures/plugin-options-subfield/build', 'test/fixtures/plugin-options-subfield/expected');
+        });
+        done();
+      });
+  });
+
+  it('should accept plugin options for multiple subfields', function(done){
+    Metalsmith('test/fixtures/plugin-options-multisubfield')
+      .use(markdown({
+        plugin: {
+          pattern: '**/*.html',
+          fields: ['contents', '*.subfield'],
+          extension: 'htm'
+        }
+      }))
+      .use(function(files, metalsmith, done){
+        var f = files['index.htm'];
+        // concat the excerpt into the main content
+        f.contents = f.contents.toString() + '\n' + f.excerpt[0].subfield.toString() + f.excerpt[1].subfield.toString() +  f.main.submain.subfield.toString()
+        done()
+      })
+      .build(function(err){
+        if (err) return done(err);
+        assert.doesNotThrow(function(){
+          equal('test/fixtures/plugin-options-multisubfield/build', 'test/fixtures/plugin-options-multisubfield/expected');
+        });
         done();
       });
   });