diff --git a/ci/requirements-optional-conda.txt b/ci/requirements-optional-conda.txt
index 9e4e8e99b5205..18aac30f04aea 100644
--- a/ci/requirements-optional-conda.txt
+++ b/ci/requirements-optional-conda.txt
@@ -22,6 +22,7 @@ s3fs
 scipy
 seaborn
 sqlalchemy
+statsmodels
 xarray
 xlrd
 xlsxwriter
diff --git a/ci/requirements-optional-pip.txt b/ci/requirements-optional-pip.txt
index 3cce3f5339883..28dafc43b09c0 100644
--- a/ci/requirements-optional-pip.txt
+++ b/ci/requirements-optional-pip.txt
@@ -24,6 +24,7 @@ s3fs
 scipy
 seaborn
 sqlalchemy
+statsmodels
 xarray
 xlrd
 xlsxwriter