diff --git a/requirements.txt b/requirements.txt
index 882bc3d9..f63d3bde 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,4 @@
-matplotlib==3.4.3 ; python_version >= '3.7' # remove once compatibility problem with matplotlib 3.5+ is restored
+matplotlib==3.6.1 ; python_version >= '3.7' # remove once compatibility problem with matplotlib 3.5+ is restored
 pytrip98[remote]~=3.7  # use versions compatible with 3.7 (3.7 and later from 3.x series)
 PyQt5>=5.15  ; python_version >= '3.8'
 PyQt5<5.10 ; python_version < '3.8'
diff --git a/setup.py b/setup.py
index d46be411..76339dc1 100644
--- a/setup.py
+++ b/setup.py
@@ -23,7 +23,7 @@ def write_version_py(filename=os.path.join('pytripgui', 'VERSION')):
 
 # install_requires is list of dependencies needed by pip when running `pip install`
 install_requires = [
-    "matplotlib==3.4.3 ; python_version>='3.7'",
+    "matplotlib==3.6.1 ; python_version>='3.7'",
     'pytrip98[remote]~=3.7',
     'anytree~=2.8',
     'Events~=0.4',