diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 68fb490f..6e6437a0 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -36,7 +36,7 @@ jobs:
       matrix:
         os: [ubuntu-22.04, ubuntu-20.04]
         # Lets try to keep testing an LTS python and latest python
-        python-version: ['3.7', '3.12', '3.13']
+        python-version: ['3.8', '3.12', '3.13']
 
     runs-on: ${{ matrix.os }}
     name: Ubuntu ${{ matrix.os }} with Python ${{ matrix.python-version }}
@@ -57,9 +57,12 @@ jobs:
       - name: Install PyRDP dependencies
         run: |
           sudo apt-get update && sudo apt-get install -y --no-install-recommends \
-              build-essential python3-dev \
+              build-essential python3-dev pkg-config \
               libegl1 libxcb-cursor0 libxkbcommon-x11-0 libxcb-icccm4 libxcb-keysyms1 \
-              libavcodec58 libavdevice58
+              libavcodec58 libavdevice58 \
+              libavformat-dev libavcodec-dev libavdevice-dev libavfilter-dev \
+              libswscale-dev libavutil-dev
+
       - name: Install PyRDP
         working-directory: .
         run: pip install -U -e .[full]
@@ -106,7 +109,7 @@ jobs:
     strategy:
       matrix:
         # Lets try to keep testing an LTS python and latest python
-        python-version: ['3.7', '3.12', '3.13']
+        python-version: ['3.8', '3.12', '3.13']
 
     name: Windows with Python ${{ matrix.python-version }}
     steps:
diff --git a/Dockerfile b/Dockerfile
index 701f803e..a254ab78 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -6,7 +6,11 @@ ARG DEBIAN_FRONTEND=noninteractive
 RUN apt-get update && apt-get install -y --no-install-recommends \
         python3 python3-pip python3-venv \
         # Required to build RLE module
-        build-essential python3-dev
+        build-essential python3-dev pkg-config \
+        libavformat-dev libavcodec-dev libavdevice-dev libavfilter-dev \
+        libswscale-dev libavutil-dev \
+        # minimize image size
+        && rm -rf /var/lib/apt/lists/*
 
 RUN python3 -m venv /opt/venv
 # Make sure we use the virtualenv:
diff --git a/pyproject.toml b/pyproject.toml
index c0be36e8..4265112e 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -41,6 +41,9 @@ dependencies = [
     'appdirs>=1,<2',
     'cryptography>=3.3.2,<42',
     'namesgenerator>=0.3,<1',
+    # working around Windows build bugs #512
+    'numpy>=1,<2; python_version < "3.13"',
+    "numpy>=1.26.4; python_version >= '3.13'",
     'progressbar2>=3.20,<5',
     'pyasn1>=0,<1',
     'pycryptodome>=3.5,<4',
@@ -55,7 +58,7 @@ dependencies = [
 [project.optional-dependencies]
 full = [
     'wheel>=0.34.2',
-    'av>=8,<15',
+    'av>=8,<14',
     'PySide6>=6.3,<7',
     'qimage2ndarray>=1.6,<2',
     'py-notifier>=0.5.0',
diff --git a/requirements-slim.txt b/requirements-slim.txt
index 28486bef..f88d968a 100644
--- a/requirements-slim.txt
+++ b/requirements-slim.txt
@@ -1,24 +1,27 @@
 appdirs==1.4.4
-attrs==23.2.0
-Automat==22.10.0
-cffi==1.16.0
+attrs==26.1.0
+Automat==25.4.16
+cffi==2.0.0
 constantly==23.10.4
 cryptography==41.0.7
 hyperlink==21.0.0
-idna==3.6
-incremental==22.10.0
+idna==3.14
+Incremental==24.11.0
 namesgenerator==0.3
-progressbar2==4.3.2
-pyasn1==0.5.1
-pyasn1-modules==0.3.0
-pycparser==2.21
-pycryptodome==3.20.0
+packaging==26.2
+progressbar2==4.5.0
+py-notifier==0.5.0
+pyasn1==0.6.3
+pyasn1_modules==0.4.2
+pycparser==3.0
+pycryptodome==3.23.0
 pyOpenSSL==23.3.0
-pytz==2023.3.post1
-rsa==4.9
-scapy==2.5.0
-service-identity==24.1.0
-six==1.16.0
-Twisted==23.10.0
-typing_extensions==4.9.0
-zope.interface==6.1
+pytz==2026.2
+qimage2ndarray==1.10.0
+rsa==4.9.1
+scapy==2.7.0
+service-identity==24.2.0
+Twisted==26.4.0
+typing_extensions==4.15.0
+wheel==0.47.0
+zope.interface==8.4
diff --git a/requirements.txt b/requirements.txt
index 08963098..c11316d9 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,33 +1,34 @@
 appdirs==1.4.4
-attrs==23.2.0
-Automat==22.10.0
+attrs==26.1.0
+Automat==25.4.16
 av==11.0.0
-cffi==1.16.0
+cffi==2.0.0
 constantly==23.10.4
 cryptography==41.0.7
 hyperlink==21.0.0
-idna==3.6
-incremental==22.10.0
+idna==3.14
+Incremental==24.11.0
 namesgenerator==0.3
-numpy==1.26.3
-progressbar2==4.3.2
+numpy==1.26.4
+packaging==26.2
+progressbar2==4.5.0
 py-notifier==0.5.0
-pyasn1==0.5.1
-pyasn1-modules==0.3.0
-pycparser==2.21
-pycryptodome==3.20.0
+pyasn1==0.6.3
+pyasn1_modules==0.4.2
+pycparser==3.0
+pycryptodome==3.23.0
 pyOpenSSL==23.3.0
-PySide6==6.6.1
-PySide6-Addons==6.6.1
-PySide6-Essentials==6.6.1
-python-utils==3.8.1
-pytz==2023.3.post1
+PySide6==6.11.0
+PySide6_Addons==6.11.0
+PySide6_Essentials==6.11.0
+python-utils==3.9.1
+pytz==2026.2
 qimage2ndarray==1.10.0
-rsa==4.9
-scapy==2.5.0
-service-identity==24.1.0
-shiboken6==6.6.1
-six==1.16.0
-Twisted==23.10.0
-typing_extensions==4.9.0
-zope.interface==6.1
+rsa==4.9.1
+scapy==2.7.0
+service-identity==24.2.0
+shiboken6==6.11.0
+Twisted==26.4.0
+typing_extensions==4.15.0
+wheel==0.47.0
+zope.interface==8.4