diff --git a/plugins/gfm.py b/plugins/gfm.py
index 07ec49b..c002ee4 100644
--- a/plugins/gfm.py
+++ b/plugins/gfm.py
@@ -165,8 +165,8 @@ def read_source(self, source_path):
                     name = match.group(1).strip().lower()
                     if name != 'slug':
                         value = match.group(2).strip()
-                        if name == 'date':
-                            value = pelican.utils.get_date(value)
+                        # Ensure the correct types are used
+                        value = self.process_metadata(name, value)
                     metadata[name] = value
                     #if name != 'title':
                     #  print 'META:', name, value