diff --git a/.circleci/unittest/linux/scripts/environment.yml b/.circleci/unittest/linux/scripts/environment.yml
index 3232e83e48..10f84b7535 100644
--- a/.circleci/unittest/linux/scripts/environment.yml
+++ b/.circleci/unittest/linux/scripts/environment.yml
@@ -14,3 +14,4 @@ dependencies:
     - kaldi-io
     - scipy
     - parameterized
+    - numba==0.48
diff --git a/.circleci/unittest/windows/scripts/environment.yml b/.circleci/unittest/windows/scripts/environment.yml
index 7f1c8ec1d6..8ee3eceb5c 100644
--- a/.circleci/unittest/windows/scripts/environment.yml
+++ b/.circleci/unittest/windows/scripts/environment.yml
@@ -15,3 +15,4 @@ dependencies:
     - librosa
     - future
     - parameterized
+    - numba==0.48