diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 47fbf28..bfb310b 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -1,7 +1,7 @@
 repos:
   - repo: https://github.com/astral-sh/ruff-pre-commit
     # Ruff version.
-    rev: v0.8.6
+    rev: v0.9.1
     hooks:
       # Run the linter.
       - id: ruff
diff --git a/Dockerfile b/Dockerfile
index 74e0abc..0a85194 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -9,7 +9,7 @@ WORKDIR /app
 COPY requirements.txt /app
 RUN python3 -m venv .
 RUN python3 -m pip install pip==24.3.1
-RUN python3 -m pip install setuptools==75.6.0
+RUN python3 -m pip install setuptools==75.8.0
 RUN python3 -m pip install --no-cache-dir -r requirements.txt
 COPY ./app /app
 EXPOSE 5000
diff --git a/README.md b/README.md
index 30498bb..e577a35 100644
--- a/README.md
+++ b/README.md
@@ -31,7 +31,7 @@ The code has been tested using:
 - [TensorFlow] (2.18): an open source software [Deep Learning] library for high performance numerical computation using data flow graphs.
 - [Matplotlib] (3.10): a plotting library for [Python] and its numerical mathematics extension [NumPy].
 - [NumPy] (2.0): a library for [Python], adding support for large, multi-dimensional arrays and matrices, along with a large collection of high-level mathematical functions to operate on these arrays.
-- [Ruff] (0.8): An extremely fast Python linter and code formatter, written in Rust.
+- [Ruff] (0.9): An extremely fast Python linter and code formatter, written in Rust.
 - [scikit-image] (0.25): a collection of algorithms for image processing with [Python].
 
 ### PYTHON VIRTUAL ENVIRONMENT
@@ -44,7 +44,7 @@ Command to configure virtual environment with [venv]:
 ~/deeplearning_flask$ python3 -m venv .venv
 ~/deeplearning_flask$ source .venv/bin/activate
 (.venv)~/deeplearning_flask$ python3 -m pip install pip==24.3.1
-(.venv)~/deeplearning_flask$ python3 -m pip install setuptools==75.6.0
+(.venv)~/deeplearning_flask$ python3 -m pip install setuptools==75.8.0
 (.venv)~/deeplearning_flask$ python3 -m pip install -r requirements_dev.txt
 (.venv)~/deeplearning_flask$ pre-commit install
 ```
diff --git a/requirements.txt b/requirements.txt
index 503f2aa..e123949 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -6,6 +6,6 @@ pre-commit==4.0.1
 pur==7.3.3
 pytest==8.3.4
 requests==2.32.3
-ruff==0.8.6
+ruff==0.9.1
 scikit-image==0.25.0
 tensorflow==2.18.0