diff --git a/.arclint b/.arclint
--- a/.arclint
+++ b/.arclint
@@ -259,7 +259,7 @@
         },
         "lint-python-mypy": {
             "type": "lint-python-mypy",
-            "version": ">=0.780",
+            "version": ">=0.910",
             "include": "(\\.py$)",
             "exclude": [
                 "(^contrib/gitian-builder/)",
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -135,7 +135,7 @@
 Install all the code formatting tools on Debian Bullseye (11) or Ubuntu 20.04:
 ```
 sudo apt-get install python3-autopep8 python3-pip php-codesniffer shellcheck yamllint
-pip3 install "isort>=5.6.4" "mypy>=0.780" "flynt>=0.78" "flake8>=5" flake8-comprehensions
+pip3 install "isort>=5.6.4" "mypy>=0.910" "flynt>=0.78" "flake8>=5" flake8-comprehensions
 echo "export PATH=\"`python3 -m site --user-base`/bin:\$PATH\"" >> ~/.bashrc
 source ~/.bashrc
 ```
diff --git a/contrib/utils/install-dependencies-bullseye.sh b/contrib/utils/install-dependencies-bullseye.sh
--- a/contrib/utils/install-dependencies-bullseye.sh
+++ b/contrib/utils/install-dependencies-bullseye.sh
@@ -143,7 +143,7 @@
 pip3 install "lief>=0.11.4"
 
 # Up-to-date mypy, isort and flynt packages are required python linters
-pip3 install isort==5.6.4 mypy==0.780 flynt==0.78 flake8==6.0.0
+pip3 install isort==5.6.4 mypy==0.910 flynt==0.78 flake8==6.0.0
 echo "export PATH=\"$(python3 -m site --user-base)/bin:\$PATH\"" >> ~/.bashrc
 # shellcheck source=/dev/null
 source ~/.bashrc