diff --git a/lib/jol/blog.ex b/lib/jol/blog.ex
index 64505b8..66878d1 100644
--- a/lib/jol/blog.ex
+++ b/lib/jol/blog.ex
@@ -9,6 +9,9 @@ defmodule JOL.Blog do
   @posts Enum.sort_by(@posts, & &1.date, {:desc, Date})
   @tags @posts |> Enum.flat_map(& &1.tags) |> Enum.uniq() |> Enum.sort()
 
+  @spec posts() :: []
   def posts, do: @posts
+
+  @spec unique_tag_list() :: []
   def unique_tag_list, do: @tags
 end