diff --git a/machines/kat-son/doc/0005-feat-match-all-substring-by-default.patch b/machines/kat-son/doc/0005-feat-match-all-substring-by-default.patch
new file mode 100644
index 0000000..17bbac8
--- /dev/null
+++ b/machines/kat-son/doc/0005-feat-match-all-substring-by-default.patch
@@ -0,0 +1,28 @@
+From 206ce2744cdaa166ee482fba90a879f2688b234a Mon Sep 17 00:00:00 2001
+From: catvayor <catvayor@katvayor.net>
+Date: Sat, 21 Dec 2024 10:14:46 +0100
+Subject: [PATCH] feat: match all substring by default
+
+---
+ layouts/index.html | 4 ++--
+ 1 file changed, 2 insertions(+), 2 deletions(-)
+
+diff --git a/layouts/index.html b/layouts/index.html
+index 780ea78..c50ada4 100644
+--- a/layouts/index.html
++++ b/layouts/index.html
+@@ -109,9 +109,9 @@
+             <li>Strategy</li>
+             <li>
+               <select id="indexStrategySelect" style="margin-bottom:0">
+-                <option value="JsSearch.AllSubstringsIndexStrategy">All substrings</option>
++                <option value="JsSearch.AllSubstringsIndexStrategy" selected>All substrings</option>
+                 <option value="JsSearch.ExactWordIndexStrategy">Exact match</option>
+-                <option value="JsSearch.PrefixIndexStrategy" selected>Prefix matching</option>
++                <option value="JsSearch.PrefixIndexStrategy">Prefix matching</option>
+               </select>
+             </li>
+         </div>
+-- 
+2.47.0
+
diff --git a/machines/kat-son/doc/hugo-theme-extranix-options-search.nix b/machines/kat-son/doc/hugo-theme-extranix-options-search.nix
index f53daa5..84ef19f 100644
--- a/machines/kat-son/doc/hugo-theme-extranix-options-search.nix
+++ b/machines/kat-son/doc/hugo-theme-extranix-options-search.nix
@@ -19,6 +19,7 @@ stdenv.mkDerivation {
     ./0002-chore-remove-useless-dependencies.patch
     ./0003-feat-separate-HTML-description-of-MD-description.patch
     ./0004-fix-indentation-of-ul.patch
+    ./0005-feat-match-all-substring-by-default.patch
   ];
 
   installPhase =