diff --git a/requirements.txt b/requirements.txt
index f162e1ab648d17e4f031db61f760201fb6d32e5f..3c3863683316fd28bd023ca3e664c2ccfcf52896 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,3 +1,3 @@
 mkdocs>=0.16.1,<0.17.0
-pymdown-extensions>=1.4
-mkdocs-bootswatch>=0.4.0
+pymdown-extensions==1.4
+mkdocs-bootswatch==0.4.0