diff --git a/_config.yml b/_config.yml
index 2f79d36..6eb08fc 100644
--- a/_config.yml
+++ b/_config.yml
@@ -25,7 +25,11 @@ plugins:
   - jekyll-feed
   - jekyll-remote-theme
 
-remote_theme: sylhare/type-on-strap
+# keep below 2.5.0 b/c 2.5.1 removed bootstrap iso css
+# which either breaks the tabs from the download section
+# or the dark mode, see
+# https://github.com/sylhare/Type-on-Strap/pull/549
+remote_theme: sylhare/type-on-strap@v2.5.0
 
 # Theme settings
 color_theme: auto