diff --git a/.github/workflows/simple-program-linux.yml b/.github/workflows/simple-program-linux.yml
index cef20978..9a6229d7 100644
--- a/.github/workflows/simple-program-linux.yml
+++ b/.github/workflows/simple-program-linux.yml
@@ -19,7 +19,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ["3.9", "3.14"]
+        python-version: ["3.10", "3.14"]
 
     steps:
     - uses: actions/checkout@v7
diff --git a/.github/workflows/simple-program-macos.yml b/.github/workflows/simple-program-macos.yml
index 637267a3..32a51f89 100644
--- a/.github/workflows/simple-program-macos.yml
+++ b/.github/workflows/simple-program-macos.yml
@@ -19,7 +19,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ["3.9", "3.14"]
+        python-version: ["3.10", "3.14"]
 
     steps:
     - uses: actions/checkout@v7
diff --git a/.github/workflows/simple-program-windows.yml b/.github/workflows/simple-program-windows.yml
index b3f1a451..7a368c90 100644
--- a/.github/workflows/simple-program-windows.yml
+++ b/.github/workflows/simple-program-windows.yml
@@ -19,7 +19,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ["3.9", "3.14"]
+        python-version: ["3.10", "3.14"]
 
     steps:
     - uses: actions/checkout@v7
diff --git a/.github/workflows/system-monitor-linux.yml b/.github/workflows/system-monitor-linux.yml
index 37901067..c8265cb6 100644
--- a/.github/workflows/system-monitor-linux.yml
+++ b/.github/workflows/system-monitor-linux.yml
@@ -19,7 +19,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ["3.9", "3.14"]
+        python-version: ["3.10", "3.14"]
         theme: [ "3.5inchTheme2" ]
 
     steps:
diff --git a/.github/workflows/system-monitor-macos.yml b/.github/workflows/system-monitor-macos.yml
index 77ee1969..f2104a7a 100644
--- a/.github/workflows/system-monitor-macos.yml
+++ b/.github/workflows/system-monitor-macos.yml
@@ -19,7 +19,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ["3.9", "3.14"]
+        python-version: ["3.10", "3.14"]
         theme: [ "3.5inchTheme2" ]
 
     steps:
diff --git a/.github/workflows/system-monitor-windows.yml b/.github/workflows/system-monitor-windows.yml
index 2700563c..2d9bf577 100644
--- a/.github/workflows/system-monitor-windows.yml
+++ b/.github/workflows/system-monitor-windows.yml
@@ -19,7 +19,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ["3.9", "3.14"]
+        python-version: ["3.10", "3.14"]
         theme: [ "3.5inchTheme2" ]
 
     steps:
diff --git a/library/pythoncheck.py b/library/pythoncheck.py
index 45383997..feb6a16e 100644
--- a/library/pythoncheck.py
+++ b/library/pythoncheck.py
@@ -23,7 +23,7 @@
 import sys
 
 # Oldest / newest version supported
-MIN_PYTHON = (3, 9)
+MIN_PYTHON = (3, 10)
 MAX_PYTHON = (3, 14)
 
 
diff --git a/requirements.txt b/requirements.txt
index 67b85aab..9fe57603 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -16,15 +16,13 @@ darkdetect~=0.8.0       # To detect if the user is using Dark Mode
 pywinstyles~=1.8; sys_platform=="win32"  # Windows only: apply color theme to title bar
 
 # HTTP library
-requests~=2.32.5; python_version < "3.10"
-requests~=2.34.2; python_version >= "3.10"
+requests~=2.34.2
 
 # Image generation
-Pillow~=11.3.0; python_version < "3.10"   # For Python 3.9, Pillow 11.x is the latest supported
-Pillow~=13.0.0; python_version >= "3.10"  # For Python 3.10+, use latest Pillow
+Pillow~=12.3.0; python_version < "3.11"   # For Python 3.10, Pillow 12.x is the latest supported
+Pillow~=13.0.0; python_version >= "3.11"  # For Python 3.11+, use latest Pillow
 
 # Efficient image serialization
-numpy~=2.0.2; python_version < "3.10"   # For Python 3.9, numpy 2.0.x is the latest supported
 numpy~=2.2.6; python_version == "3.10"  # For Python 3.10, numpy 2.2.x is the latest supported
 numpy~=2.4.4; python_version == "3.11"  # For Python 3.11, numpy 2.2.x is the latest supported
 numpy~=2.5.4; python_version > "3.11"   # For Python > 3.11, use latest numpy
@@ -42,6 +40,5 @@ pyamdgpuinfo~=2.1.6; sys_platform=="linux" and python_version <= "3.12"
 pyadl~=0.1; sys_platform=="win32"
 
 # Following packages are for LibreHardwareMonitor integration on Windows
-pythonnet~=3.0.5; sys_platform=="win32" and python_version < "3.10"   # For Python 3.9, pythonnet 3.0.x is the latest supported
-pythonnet~=3.1.0; sys_platform=="win32" and python_version >= "3.10"  # For Python 3.10+, use latest pythonnet
+pythonnet~=3.1.0
 pywin32>=312; sys_platform=="win32"