diff --git a/source/rst/index_time_series_models.rst b/source/rst/index_time_series_models.rst
index ff34e9a..3a33689 100644
--- a/source/rst/index_time_series_models.rst
+++ b/source/rst/index_time_series_models.rst
@@ -16,6 +16,8 @@ These lectures look at important concepts in time series that are used in econom
 .. toctree::
     :maxdepth: 2
 
+    arma
+    estspec
     additive_functionals
     lu_tricks
     classical_filtering