diff --git a/ci/requirements-3.6_NUMPY_DEV.build b/ci/requirements-3.6_NUMPY_DEV.build
index 900c050f1cc9e..336fbe86b57d8 100644
--- a/ci/requirements-3.6_NUMPY_DEV.build
+++ b/ci/requirements-3.6_NUMPY_DEV.build
@@ -1,3 +1,2 @@
 python=3.6*
 pytz
-cython
diff --git a/ci/requirements-3.6_NUMPY_DEV.build.sh b/ci/requirements-3.6_NUMPY_DEV.build.sh
index 90ed04f8f0c17..fd79142c5cebb 100644
--- a/ci/requirements-3.6_NUMPY_DEV.build.sh
+++ b/ci/requirements-3.6_NUMPY_DEV.build.sh
@@ -14,4 +14,7 @@ pip install --pre --upgrade --timeout=60 -f $PRE_WHEELS numpy scipy
 # install dateutil from master
 pip install -U git+git://github.com/dateutil/dateutil.git
 
+# cython via pip
+pip install cython
+
 true