diff --git a/requirements_dev.txt b/requirements_dev.txt
index 088eb4f..48731ba 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -9,4 +9,4 @@ PyYAML==3.12
 pytest==3.5.0
 pytest-cov==2.5.1
 pytest-runner==4.2
-sphinx_rtd_theme==0.2.5b2
+sphinx_rtd_theme==0.4.3