diff --git a/.circleci/unittest/windows/scripts/environment.yml b/.circleci/unittest/windows/scripts/environment.yml
index 8ee3eceb5c..fb57f0facc 100644
--- a/.circleci/unittest/windows/scripts/environment.yml
+++ b/.circleci/unittest/windows/scripts/environment.yml
@@ -9,7 +9,7 @@ dependencies:
   - codecov
   - pip
   - pip:
-    - scipy
+    - scipy == 1.4.1
     - kaldi-io
     - PySoundFile
     - librosa