diff --git a/lectures_beamer/S1E1_Modelling.tex b/lectures_beamer/S1E1_Modelling.tex
index 530e74f293df275d65f8a1e35be5ebebaef1f557..f38f30adb1277e63f8129fa9353c59241fd64b72 100644
--- a/lectures_beamer/S1E1_Modelling.tex
+++ b/lectures_beamer/S1E1_Modelling.tex
@@ -2,7 +2,7 @@
 \PassOptionsToPackage{usenames,dvipsnames}{xcolor}
 \documentclass[aspectratio=169,20pt, USenglish]{beamer}
 
-\usetheme{ost}
+% \usetheme{ost}
 \input{include/beamer_basics.tex} % PACKAGES
 \input{include/mathsymbols.tex}   % SYMBOLS
 
diff --git a/lectures_beamer/S1E2_Inference.tex b/lectures_beamer/S1E2_Inference.tex
index b2f14e420ae1edb2abc226d32bd2a2b37d665e4f..bc2971d45c0cce62703d481bbc6c2320102225fe 100644
--- a/lectures_beamer/S1E2_Inference.tex
+++ b/lectures_beamer/S1E2_Inference.tex
@@ -2,7 +2,7 @@
 \PassOptionsToPackage{usenames,dvipsnames}{xcolor}
 \documentclass[aspectratio=169,20pt, USenglish]{beamer}
 
-\usetheme{ost}
+% \usetheme{ost}
 \input{include/beamer_basics.tex} % PACKAGES
 \input{include/mathsymbols.tex}   % SYMBOLS