diff --git a/user_guide_src/requirements.txt b/user_guide_src/requirements.txt
index 81dad4e..4e76353 100644
--- a/user_guide_src/requirements.txt
+++ b/user_guide_src/requirements.txt
@@ -1,2 +1 @@
-sphinx_rtd_theme
 sphinxcontrib.phpdomain
\ No newline at end of file