diff --git a/README.md b/README.md
index f46ca6c..cd7a252 100644
--- a/README.md
+++ b/README.md
@@ -7,7 +7,8 @@ LocNDF: Neural Distance Field Mapping for Robot Localization
 The system has been tested with Ubuntu-20.04 and Python3.9. Install the following dependencies if needed:
 
 ```sh
-apt-get install libgl1-mesa-glx libx11-dev ldconfig
+apt-get install libgl1-mesa-glx libx11-dev libfreetype6-dev libfontconfig1-dev python3-tk
+RUN ldconfig
 ```
 
 For the installation of the python package simply clone the repo and pip install it.
diff --git a/requirements.txt b/requirements.txt
index dfa4881..a3d4951 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -6,7 +6,7 @@ open3d
 numpy
 Click
 natsort
-matplotlib
 pytorch_lightning
 PyYAML
 scipy
+matplotlib==3.1.2