diff --git a/.ci_support/win_64_.yaml b/.ci_support/win_64_.yaml
index 3860cc2..d1d2b41 100644
--- a/.ci_support/win_64_.yaml
+++ b/.ci_support/win_64_.yaml
@@ -2,8 +2,6 @@ c_compiler:
 - vs2019
 c_stdlib:
 - vs
-c_stdlib_version:
-- '2019'
 channel_sources:
 - conda-forge
 channel_targets: