diff --git a/jekyllnb/exporter.py b/jekyllnb/exporter.py
index 92c6fb5..0c6c23a 100644
--- a/jekyllnb/exporter.py
+++ b/jekyllnb/exporter.py
@@ -10,7 +10,7 @@
 class JekyllExporter(MarkdownExporter):
     """Exporter to write Markdown with Jekyll metadata"""
 
-    resources: Dict[str, Any] = {}
+    resources = {}  # type: Dict[str, Any]
 
     def from_filename(self, filename, resources=None, **kwargs):
         """Convert notebook from a file
diff --git a/jekyllnb/jekyllnb.py b/jekyllnb/jekyllnb.py
index d585d92..039d5f1 100644
--- a/jekyllnb/jekyllnb.py
+++ b/jekyllnb/jekyllnb.py
@@ -7,7 +7,7 @@
 
 from .__version__ import __version__
 
-JEKYLLNB_ALIASES: Dict[str, str] = {}
+JEKYLLNB_ALIASES = {}  # type: Dict[str, str]
 JEKYLLNB_ALIASES.update(nbconvert_aliases)
 JEKYLLNB_ALIASES.update(
     {
@@ -17,7 +17,7 @@
     }
 )
 
-JEKYLLNB_FLAGS: Dict[str, Sequence[Any]] = {}
+JEKYLLNB_FLAGS = {}  # type: Dict[str, Sequence[Any]]
 JEKYLLNB_FLAGS.update(nbconvert_flags)
 JEKYLLNB_FLAGS.update(
     {