diff --git a/reactome2py/content.py b/reactome2py/content.py
index 06e0667..ae0cde2 100644
--- a/reactome2py/content.py
+++ b/reactome2py/content.py
@@ -105,7 +105,7 @@ def event_ancestors(id='R-HSA-5673001'):
     return util.get_json(f'{_SERVICE}/data/event/{id}/ancestors')
 
 
-def event_species(species='9606', pathways_only=False, token=None, resource='Total', include_interactors=False) \
+def event_species(species='9606', pathways_only=False, token=None, resource='TOTAL', include_interactors=False) \
         -> List[EventHierarchyNode]:
     """
     Events (pathways and reactions) in Reactome are organised in a hierarchical structure for every species.
@@ -134,7 +134,7 @@ def event_species(species='9606', pathways_only=False, token=None, resource='Tot
 
 
 def export_diagram(id='R-HSA-177929', ext='png', quality='5', flag_interactors=False, title=True, margin='15',
-                   ehld=True, diagram_profile='Modern', resource='Total', analysis_profile='Standard',
+                   ehld=True, diagram_profile='Modern', resource='TOTAL', analysis_profile='Standard',
                    token: str = None,
                    flag: str = None, sel: List[str] = None, exp_column: str = None, file='report', path=''):
     """
@@ -183,7 +183,7 @@ def export_diagram(id='R-HSA-177929', ext='png', quality='5', flag_interactors=F
     )
 
 
-def export_document(id='R-HSA-177929', level='1', diagram_profile='Modern', resource='Total',
+def export_document(id='R-HSA-177929', level='1', diagram_profile='Modern', resource='TOTAL',
                     analysis_profile='Standard', token: str = None, exp_column: str = None, file='report', path=''):
     """
     This method accepts identifiers for Event class instances.
@@ -247,7 +247,7 @@ def export_event(id='R-HSA-177929', format='sbgn', file='report', path=''):
 
 def export_fireworks(species='9606', ext='png', file='report', path='', quality='5', flag: str = None,
                      flag_interactors=False,
-                     sel: List[str] = None, title=True, margin='15', resource='Total', diagram_profile='',
+                     sel: List[str] = None, title=True, margin='15', resource='TOTAL', diagram_profile='',
                      coverage=False,
                      token=None,
                      exp_column=None):
@@ -296,7 +296,7 @@ def export_fireworks(species='9606', ext='png', file='report', path='', quality=
 
 def export_reaction(id='R-HSA-6787403', ext='png', file='report', path='', quality='5', flag=None,
                     flag_interactors=False,
-                    sel: List[str] = None, title=True, margin='15', resource='Total', diagram_profile='',
+                    sel: List[str] = None, title=True, margin='15', resource='TOTAL', diagram_profile='',
                     coverage=False, token=None,
                     exp_column=None):
     """
diff --git a/reactome2py/util.py b/reactome2py/util.py
index 682078f..b64508d 100644
--- a/reactome2py/util.py
+++ b/reactome2py/util.py
@@ -44,17 +44,23 @@ def post(url: str, data: Any, headers: Dict[str, str] = None, params: Dict[str,
     """
     :return: Json dictionary object of The schema.org for an Event in Reactome knowledgebase
     """
-    if headers is None:
-        headers = {}
 
-    headers = {
-        'accept': '*/*',
-        'content-type': 'text/plain',
-        **headers
-    }
+    if isinstance(data, bytes):
+        headers = {}
+        files = {'file': data}
+        data = None
+    else:
+        if headers is None:
+            headers = {}
+        headers = {
+            'accept': '*/*',
+            'content-type': 'text/plain',
+            **headers
+        }
+        files = None
 
     try:
-        response = requests.post(url=url, headers=headers, params=params, data=data)
+        response = requests.post(url=url, headers=headers, params=params, data=data, files=files)
         if response.status_code == 200:
             return response
         else: