diff --git a/md_pdf/config/read.py b/md_pdf/config/read.py
index 5a6f0d4..2ae0bcd 100644
--- a/md_pdf/config/read.py
+++ b/md_pdf/config/read.py
@@ -1,8 +1,9 @@
 import yaml
+from dotmap import DotMap
 import os
 from md_pdf.consts import CONFIG_FILE
 
 
 def load_config():
     with open(os.path.join(CONFIG_FILE)) as f:
-        return yaml.load(f)
+        return DotMap(yaml.load(f))
diff --git a/md_pdf/config/validate.py b/md_pdf/config/validate.py
index f01e83c..a0d4c0f 100644
--- a/md_pdf/config/validate.py
+++ b/md_pdf/config/validate.py
@@ -10,7 +10,7 @@ REQUIRED_KEYS = [
 def check_required_keys(config):
     missing_keys = [key for key in REQUIRED_KEYS if key not in config]
     if missing_keys:
-        raise ConfigValidationException("Missing required keys: {}".format(missing_keys))
+        raise ConfigValidationException("Missing required keys: {}".format(", ".join(missing_keys)))
 
 
 def validate_config(config):
diff --git a/setup.py b/setup.py
index 75cf615..f587171 100644
--- a/setup.py
+++ b/setup.py
@@ -6,6 +6,7 @@ setup(
     version="1.0",
     install_requires=[
         "beautifulsoup4==4.5.3",
+        "dotmap==1.2.17",
         "jinja2==2.9.5",
         "pdfkit==0.6.1",
         "pypandoc==1.3.3",