diff --git a/.appveyor.yml b/.appveyor.yml
index 55a5a78f70..c87fa55cee 100644
--- a/.appveyor.yml
+++ b/.appveyor.yml
@@ -1,14 +1,14 @@
 environment:
   matrix:
     - TARGET_ARCH: x64
-      CONDA_PY: 3.7
+      CONDA_PY: 3.9
       CONDA_INSTALL_LOCN: C:\\Miniconda37-x64
       APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2017
       platform: x64
       SHARED: OFF
 
     - TARGET_ARCH: x86
-      CONDA_PY: 3.7
+      CONDA_PY: 3.9
       CONDA_INSTALL_LOCN: C:\\Miniconda37
       APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2017
       platform: x86