diff --git a/doc/en/requirements.txt b/doc/en/requirements.txt
index b9fdcb8f6..80c57422f 100644
--- a/doc/en/requirements.txt
+++ b/doc/en/requirements.txt
@@ -1,5 +1,3 @@
-pygments-pytest>=1.0.4
-# pinning sphinx to 1.4.* due to search issues with rtd:
-# https://github.com/rtfd/readthedocs-sphinx-ext/issues/25
-sphinx ==1.4.*
+pygments-pytest>=1.1.0
+sphinx>=1.8.2
 sphinxcontrib-trio