diff --git a/circle.yml b/circle.yml
index f321653..9ee76d2 100644
--- a/circle.yml
+++ b/circle.yml
@@ -4,6 +4,9 @@ machine:
   node:
     version: 6.10.2
 
+general:
+  artifacts:
+    - test-files/out/
 
 dependencies:
   pre:
@@ -19,4 +22,5 @@ test:
     - flake8 md_pdf/ --ignore=E128,E501
     - safety check
     - bandit -r md_pdf/
-    - mdp --help
+    - mdp --update-csl
+    - cd test-files/ && mdp -vvv
diff --git a/md_pdf/assets/static/style.scss b/md_pdf/assets/static/style.scss
index 1212730..d158fa2 100644
--- a/md_pdf/assets/static/style.scss
+++ b/md_pdf/assets/static/style.scss
@@ -6,4 +6,17 @@ body.cover {
     padding-top: 400px;
     font-size: 48px;
   }
+
+  & h3 {
+    font-size: 36px;
+  }
+
+  & h4 {
+    font-size: 18px;
+  }
+}
+
+body, html {
+  line-height: 1.5;
+  font-size: 12px;
 }
diff --git a/md_pdf/build/pdf.py b/md_pdf/build/pdf.py
index 39c550d..60c6b4b 100644
--- a/md_pdf/build/pdf.py
+++ b/md_pdf/build/pdf.py
@@ -7,6 +7,9 @@ import logging
 logger = logging.getLogger(__file__)
 
 
+DEFAULT_MARGIN_VERTICAL = '1.5cm'
+DEFAULT_MARGIN_HORIZONTAL = '2.5cm'
+
 STYLE_FILE = os.path.join(STATIC_DIR, 'style.css')
 HEADER_FILE = os.path.join(TEMPLATES_DIR, 'header.html')
 FOOTER_FILE = os.path.join(TEMPLATES_DIR, 'footer.html')
@@ -14,11 +17,6 @@ PDF_OPTIONS = {
     "quiet": "",
     "no-pdf-compression": "",
 
-    "margin-top": '0.6in',
-    "margin-bottom": '0.6in',
-    "margin-left": '0.4in',
-    "margin-right": '0.4in',
-
     "header-html": HEADER_FILE,
     "footer-html": FOOTER_FILE,
     "footer-spacing": 5,
@@ -31,6 +29,12 @@ PDF_OPTIONS = {
 def export_pdf(content, config):
     PDF_OPTIONS['title'] = config.get('title', 'Output')
     PDF_OPTIONS['replace'] = [(key, str(value)) for key, value in config['context'].items()]
+
+    PDF_OPTIONS['margin-top'] = config['context'].get('margin_vertical', DEFAULT_MARGIN_VERTICAL)
+    PDF_OPTIONS['margin-bottom'] = config['context'].get('margin_vertical', DEFAULT_MARGIN_VERTICAL)
+    PDF_OPTIONS['margin-left'] = config['context'].get('margin_horizontal', DEFAULT_MARGIN_HORIZONTAL)
+    PDF_OPTIONS['margin-right'] = config['context'].get('margin_horizontal', DEFAULT_MARGIN_HORIZONTAL)
+
     logger.info("Rendering PDF...")
     return pdfkit.from_string(
         content,
diff --git a/md_pdf/cli.py b/md_pdf/cli.py
index d7c7965..4b7dec6 100644
--- a/md_pdf/cli.py
+++ b/md_pdf/cli.py
@@ -1,6 +1,6 @@
 import logging
 from md_pdf.args import parse_args
-from md_pdf.exceptions import PrematureExit, BaseException
+from md_pdf.exceptions import BaseException
 from md_pdf.logging import set_verbosity
 from md_pdf.build import build
 from md_pdf.config.read import load_config
@@ -19,8 +19,6 @@ def cli():
         config = load_config()
         validate_config(config)
         build(config)
-    except PrematureExit:
-        return 0
     except BaseException as e:
         logging.error(str(e))
         return 1
diff --git a/md_pdf/config/validate.py b/md_pdf/config/validate.py
index 3a66882..a9d5623 100644
--- a/md_pdf/config/validate.py
+++ b/md_pdf/config/validate.py
@@ -24,7 +24,8 @@ def check_required_keys(config):
 def test_output(config):
     abs_output_dir = os.path.abspath(config['output_dir'])
     if not os.path.isdir(abs_output_dir):
-        raise ConfigValidationException("Can't find output directory '{}'".format(abs_output_dir))
+        logger.debug("Creating output directory...")
+        os.mkdir(abs_output_dir)
     invalid_formats = [key for key in config['output_formats'] if key not in ['html', 'pdf']]
     if invalid_formats:
         raise ConfigValidationException("Invalid output formats provided: '{}'".format(", ".join(invalid_formats)))
diff --git a/md_pdf/csl.py b/md_pdf/csl.py
index 3bf07c6..1d45830 100644
--- a/md_pdf/csl.py
+++ b/md_pdf/csl.py
@@ -26,6 +26,8 @@ def download_csl():
     remove_dir(CSL_DIR)
 
     def download_handle(count, block_size, total_size):
+        if total_size < 1:  # only update the bar if we have a size
+            return
         bar.update(int(count * block_size * 100 / total_size))
 
     _, download_location = tempfile.mkstemp()
diff --git a/setup.py b/setup.py
index ec9d32c..a099a3a 100644
--- a/setup.py
+++ b/setup.py
@@ -4,6 +4,7 @@ from setuptools import setup, find_packages
 setup(
     name="md-pdf",
     version="1.0",
+    use_scm_version=True,
     install_requires=[
         "beautifulsoup4==4.5.3",
         "jinja2==2.9.5",
@@ -13,8 +14,10 @@ setup(
         "pyscss==1.3.5",
         "PyYAML==3.12"
     ],
+    setup_requires=['setuptools_scm'],
     packages=find_packages(),
     include_package_data=True,
+    zip_safe=False,
     entry_points="""
         [console_scripts]
         mdp=md_pdf.cli:cli