diff --git a/.github/workflows/release-docker.yml b/.github/workflows/release-docker.yml
index 12ee5dc..e30bb90 100644
--- a/.github/workflows/release-docker.yml
+++ b/.github/workflows/release-docker.yml
@@ -15,7 +15,7 @@ concurrency:
 jobs:
   build-docker-images:
     if: ${{ !github.event.pull_request.head.repo.fork }}
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
     steps:
       - name: Checkout repository
         uses: actions/checkout@v6
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index acc6df1..3680941 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -8,7 +8,7 @@ on:
 jobs:
   create-release:
     name: Create release
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
     steps:
       - name: Checkout repository
         uses: actions/checkout@v6
@@ -36,7 +36,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        os: [ubuntu-latest, windows-latest]
+        os: [ubuntu-22.04, windows-latest]
     steps:
       - name: Checkout repository
         uses: actions/checkout@v6
@@ -46,12 +46,12 @@ jobs:
       - name: Setup Python
         uses: actions/setup-python@v6
         with:
-          python-version: "3.13"
+          python-version: "3.11"
 
       - name: Build artifacts
         run: |
           python -m pip install -r requirements.txt
-          python -m pip install pyinstaller==6.17.0
+          python -m pip install pyinstaller==6.20.0
           cd src
           python build_package.py
 
diff --git a/Dockerfile b/Dockerfile
index 82961da..ce39f39 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM python:3.13-slim-bookworm AS builder
+FROM python:3.11-slim-bookworm AS builder
 
 # Build dummy packages to skip installing them and their dependencies
 RUN apt-get update \
@@ -12,7 +12,7 @@ RUN apt-get update \
     && equivs-build adwaita-icon-theme \
     && mv adwaita-icon-theme_*.deb /adwaita-icon-theme.deb
 
-FROM python:3.13-slim-bookworm
+FROM python:3.11-slim-bookworm
 
 # Copy dummy packages
 COPY --from=builder /*.deb /
diff --git a/README.md b/README.md
index d2b2197..1c1a590 100644
--- a/README.md
+++ b/README.md
@@ -89,7 +89,7 @@ This is the recommended way for Windows users.
 > **Warning**
 > Installing from source code only works for x64 architecture. For other architectures see Docker images.
 
-- Install [Python 3.13](https://www.python.org/downloads/).
+- Install [Python 3.11](https://www.python.org/downloads/).
 - Install [Chrome](https://www.google.com/intl/en_us/chrome/) (all OS) or [Chromium](https://www.chromium.org/getting-involved/download-chromium/) (just Linux, it doesn't work in Windows) web browser.
 - (Only in Linux) Install [Xvfb](https://en.wikipedia.org/wiki/Xvfb) package.
 - (Only in macOS) Install [XQuartz](https://www.xquartz.org/) package.
@@ -99,10 +99,10 @@ This is the recommended way for Windows users.
 
 ### From source code (FreeBSD/TrueNAS CORE)
 
-- Run `pkg install chromium python313 py313-pip xorg-vfbserver` command to install the required dependencies.
+- Run `pkg install chromium python313 py311-pip xorg-vfbserver` command to install the required dependencies.
 - Clone this repository and open a shell in that path.
-- Run `python3.13 -m pip install -r requirements.txt` command to install FlareSolverr dependencies.
-- Run `python3.13 src/flaresolverr.py` command to start FlareSolverr.
+- Run `python3.11 -m pip install -r requirements.txt` command to install FlareSolverr dependencies.
+- Run `python3.11 src/flaresolverr.py` command to start FlareSolverr.
 
 ### Systemd service