diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 8e3fdb8..4012d11 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -88,7 +88,7 @@ jobs:
       if: startsWith(matrix.os, 'windows')
       shell: cmd
       run: |
-        pip uninstall pyinstaller
+        pip uninstall pyinstaller -y
         git clone https://github.com/pyinstaller/pyinstaller.git
         cd pyinstaller
         git checkout tags/v4.2