diff --git a/requirements.txt b/requirements.txt
index ebafc03..c11b66c 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,3 +1,3 @@
-mkdocs>=1.0
-mkdocs-material 
+mkdocs>=0.17.5
+mkdocs-material=2.9.4 
 pymdown-extensions