diff --git a/_data/ntnu-courses.yml b/_data/ntnu-courses.yml
index e2c57e7..d3c1959 100644
--- a/_data/ntnu-courses.yml
+++ b/_data/ntnu-courses.yml
@@ -7,6 +7,10 @@
       course: ttt4280
       desc: Sensorer og instrumentering, våren 2021.
       updated: 2021-01-11
+    -
+      course: tfe4130
+      desc: Bølgeforplantning, våren 2021.
+      updated: 2021-01-12
 
 # Høsten 2020
 -
diff --git a/ntnu/21v/tfe4130/lectures/2021-01-12/2021-01-12.md b/ntnu/21v/tfe4130/lectures/2021-01-12/2021-01-12.md
new file mode 100644
index 0000000..ca37417
--- /dev/null
+++ b/ntnu/21v/tfe4130/lectures/2021-01-12/2021-01-12.md
@@ -0,0 +1,5 @@
+---
+title: "TFE4130 - Intro"
+description: "2021-01-12"
+math: true
+---
\ No newline at end of file
diff --git a/ntnu/21v/tfe4130/tfe4130.md b/ntnu/21v/tfe4130/tfe4130.md
new file mode 100644
index 0000000..6e0a996
--- /dev/null
+++ b/ntnu/21v/tfe4130/tfe4130.md
@@ -0,0 +1,9 @@
+---
+layout: layouts/list
+title: "TFE4130"
+description: "Bølgeforplantning"
+---
+
+## Forelesninger
+
+[2021-01-12](./lectures/2021-01-12/) - Intro
\ No newline at end of file
diff --git a/ntnu/ntnu.html b/ntnu/ntnu.html
index 25f20d2..e049766 100644
--- a/ntnu/ntnu.html
+++ b/ntnu/ntnu.html
@@ -6,7 +6,7 @@ description: "Alt som har med studier på NTNU å gjøre."
 
 {% for semester in site.data.ntnu-courses %}
 <h2>{{ semester.name }}</h2>
-{% assign courses = semester.courses | sort: 'update' %}
+{% assign courses = semester.courses | sort: 'updated' | reverse %}
 <div class="row row-cols-1 row-cols-md-3">
 {% for course in courses %}
   <div class="col mb-4">