diff --git a/ci/requirements-2.7_DOC_BUILD.run b/ci/requirements-2.7_DOC_BUILD.run
index 8e96f87d4fcd2..33033defc8faa 100644
--- a/ci/requirements-2.7_DOC_BUILD.run
+++ b/ci/requirements-2.7_DOC_BUILD.run
@@ -1,4 +1,4 @@
-ipython=3.2.1
+ipython
 nbconvert
 matplotlib
 scipy