diff --git a/requirements.txt b/requirements.txt
index 2fb5bb8..1f86dcb 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,3 +1,3 @@
-sphinx==3.0.4
-http://github.com/SymbiFlow/sphinx_materialdesign_theme/archive/master.zip#sphinx_symbiflow_theme
+Sphinx==3.0.4
+http://github.com/SymbiFlow/sphinx_symbiflow_theme/archive/master.zip#sphinx-symbiflow-theme
 http://github.com/SymbiFlow/sphinx-verilog-domain/archive/master.zip#sphinx-verilog-domain