diff --git a/docs/requirements.txt b/docs/requirements.txt
index b73f3706..135f6044 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -1,2 +1,2 @@
-sphinxcontrib-bibtex==0.4.0
-sphinx-rtd-theme==0.4.2
+sphinxcontrib-bibtex
+sphinx-rtd-theme