diff --git a/matplotlibrc b/matplotlibrc
deleted file mode 100644
index 7a71a67..0000000
--- a/matplotlibrc
+++ /dev/null
@@ -1,4 +0,0 @@
-text.latex.preamble : \usepackage{libertine}, \usepackage{libertinust1math}, \usepackage{mathtools}, \usepackage{amssymb}, \usepackage{siunitx}, \newlength{\elen},
-text.usetex : True
-pgf.preamble :        \usepackage{libertine}, \usepackage{libertinust1math}, \usepackage{mathtools}, \usepackage{amssymb}, \usepackage{siunitx}, \newlength{\elen},
-figure.figsize : 5.6, 3.1
\ No newline at end of file
diff --git a/requirements.txt b/requirements.txt
index 159254e..26a735f 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -5,7 +5,7 @@ scikit-image==0.13.1
 scipy==1.0.0
 
 # only used for reading images in draw.py
-Pillow==5.0.0
+Pillow==8.1.1
 
 # only used for creating nice plots for evaluation
 matplotlib==2.2.*
\ No newline at end of file