diff --git a/requirements/ci/py36.yml b/requirements/ci/py36.yml
index 4d9d25d7c6..f778704803 100644
--- a/requirements/ci/py36.yml
+++ b/requirements/ci/py36.yml
@@ -28,6 +28,7 @@ dependencies:
   - mo_pack
   - nc-time-axis
   - pandas
+  - pip
   - python-stratify
   - pyugrid
 
diff --git a/requirements/ci/py37.yml b/requirements/ci/py37.yml
index bdb097796a..5b21e9f778 100644
--- a/requirements/ci/py37.yml
+++ b/requirements/ci/py37.yml
@@ -28,6 +28,7 @@ dependencies:
   - mo_pack
   - nc-time-axis
   - pandas
+  - pip
   - python-stratify
   - pyugrid
 
diff --git a/requirements/ci/py38.yml b/requirements/ci/py38.yml
index da29d30d71..e09a7a7164 100644
--- a/requirements/ci/py38.yml
+++ b/requirements/ci/py38.yml
@@ -28,6 +28,7 @@ dependencies:
   - mo_pack
   - nc-time-axis
   - pandas
+  - pip
   - python-stratify
   - pyugrid