diff --git a/BUGS.md b/BUGS.md
index c2430f2..908f4f6 100644
--- a/BUGS.md
+++ b/BUGS.md
@@ -1,10 +1,11 @@
-# BUGS
+# Bugs and Wishlist
+
+## BUGS
 
 - nao esta a respeitar o numero de tentativas `max_tries`.
 - se na especificacao de um curso, a referencia do topico nao existir como
   directorio, rebenta.
 - internal server error ao fazer logout no macos python3.8
-- GET can get filtered by browser cache
 - topicos chapter devem ser automaticamente completos assim que as dependencias
   são satisfeitas. Nao devia ser necessario (ou possivel?) clicar neles.
 - topicos do tipo learn deviam por defeito nao ser randomizados e assumir
@@ -23,11 +24,11 @@
 - shift-enter não está a funcionar
 - default prefix should be obtained from each course (yaml conf)?
 
-# TODO
+## TODO
 
-- shuffle das perguntas dentro de um topico
 - alterar tabelas para incluir email de recuperacao de password (e outros
   avisos)
+- shuffle das perguntas dentro de um topico
 - registar `last_seen` e remover os antigos de cada vez que houver um login.
 - indicar qtos topicos faltam (>=50%) para terminar o curso.
 - ao fim de 3 tentativas com password errada, envia email com nova password.
@@ -50,8 +51,9 @@
   mais falhadas, tempo médio por pergunta.
 - normalizar com perguntations.
 
-# FIXED
+## FIXED
 
+- rankings rebenta se nunhum aluno tiver feito nenhum topico.
 - templates question-*.html tem input hidden question_ref que não é usado.
   remover?
 - goals se forem do tipo chapter deve importar todas as dependencias do chapter.
diff --git a/aprendizations/learnapp.py b/aprendizations/learnapp.py
index 3df97ff..cc4bea1 100644
--- a/aprendizations/learnapp.py
+++ b/aprendizations/learnapp.py
@@ -599,9 +599,9 @@ class LearnApp():
         return self.courses[course_id]
 
     # ------------------------------------------------------------------------
-    def get_rankings(self, uid: str, course_id: str) -> Iterable[Tuple[str, str, float]]:
+    def get_rankings(self, uid: str, cid: str) -> Iterable[Tuple[str, str, float]]:
         '''
-        Returns rankings for a certain course_id.
+        Returns rankings for a certain cid (course_id).
         User where uid have <=2 chars are considered ghosts are hidden from
         the rankings. This is so that there can be users for development or
         testing purposes, which are not real users.
@@ -609,7 +609,7 @@ class LearnApp():
         This should be modified to have a "visible" flag
         '''
 
-        logger.info('User "%s" rankings for "%s"', uid, course_id)
+        logger.info('User "%s" rankings for "%s"', uid, cid)
         query_students = select(Student.id, Student.name)
         query_student_topics = select(StudentTopic.student_id,
                                     StudentTopic.topic_id,
@@ -625,7 +625,7 @@ class LearnApp():
 
         # compute topic progress
         now = datetime.now()
-        goals = self.courses[course_id]['goals']
+        goals = self.courses[cid]['goals']
         progress: DefaultDict[str, float] = defaultdict(int)
 
         for student, topic, level, date in student_topics:
diff --git a/mypy.ini b/mypy.ini
index 79c689e..60e098e 100644
--- a/mypy.ini
+++ b/mypy.ini
@@ -2,14 +2,14 @@
 python_version = 3.9
 plugins = sqlalchemy.ext.mypy.plugin
 
-[mypy-pygments.*]
-ignore_missing_imports = True
+; [mypy-pygments.*]
+; ignore_missing_imports = True
 
-[mypy-networkx.*]
-ignore_missing_imports = True
+; [mypy-networkx.*]
+; ignore_missing_imports = True
 
-[mypy-bcrypt.*]
-ignore_missing_imports = True
+; [mypy-bcrypt.*]
+; ignore_missing_imports = True
 
-[mypy-mistune.*]
-ignore_missing_imports = True
+; [mypy-mistune.*]
+; ignore_missing_imports = True
--
libgit2 0.21.2