diff --git a/_pkgdown.yml b/_pkgdown.yml
index 2378f74f..c112e58f 100644
--- a/_pkgdown.yml
+++ b/_pkgdown.yml
@@ -1,4 +1,9 @@
 url: https://kosukeimai.github.io/MatchIt/
+template:
+  bootstrap: 5
+  bslib:
+    primary: "#952100"
+
 reference:
 - title: Matching
 - contents: