diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index fdfebc4c3..82a9fd99a 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -65,7 +65,7 @@ jobs:
           path: /cores
 
   test-windows:
-    runs-on: windows-latest
+    runs-on: windows-2019
     strategy:
       matrix:
         python-version: ["3.7", "3.10"]
diff --git a/requirements.txt b/requirements.txt
index 30073fc88..d5498836a 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -6,7 +6,7 @@ pyxdg
 pillow
 mako
 setuptools
-chardet
+chardet==4.0.0
 setproctitle
 pywin32; sys_platform == 'win32'
 certifi; sys_platform == 'win32'