diff --git a/antennas_briefly/Makefile b/antennas_briefly/Makefile
index 31b9913..fe38212 100644
--- a/antennas_briefly/Makefile
+++ b/antennas_briefly/Makefile
@@ -1,7 +1,7 @@
 all: build
 
 build:
-	pandoc -t beamer main.md -o main.pdf
+	pandoc --slide-level 2 -t beamer main.md -o main.pdf
 
 clean:
 	rm -f sdr.pdf
diff --git a/antennas_briefly/main.md b/antennas_briefly/main.md
index c832126..74172a0 100644
--- a/antennas_briefly/main.md
+++ b/antennas_briefly/main.md
@@ -2,10 +2,6 @@
 title: "Jemný úvod do radiotechniky"
 author: Emil Miler a Tomáš Macháček
 date: Nov 21, 2022
-output: main
-output:
-  main:
-    slide_level: 2
 ---
 
 ## Modulace
diff --git a/antennas_briefly/main.pdf b/antennas_briefly/main.pdf
index e5808fc..cb5f510 100644
Binary files a/antennas_briefly/main.pdf and b/antennas_briefly/main.pdf differ