diff --git a/preact/package.json b/preact/package.json
index db8d7e5..005fada 100644
--- a/preact/package.json
+++ b/preact/package.json
@@ -49,7 +49,7 @@
     "yaml-loader": "0.8.0"
   },
   "dependencies": {
-    "bootstrap-sass": "3.3.7",
+    "bootstrap-sass": "3.4.1",
     "ionicons": "3.0.0",
     "jquery.scrollto": "2.1.3",
     "preact": "10.11.3",
diff --git a/preact/yarn.lock b/preact/yarn.lock
index 4caba89..0262dac 100644
--- a/preact/yarn.lock
+++ b/preact/yarn.lock
@@ -2547,9 +2547,10 @@ boolbase@^1.0.0:
   resolved "https://registry.yarnpkg.com/boolbase/-/boolbase-1.0.0.tgz#68dff5fbe60c51eb37725ea9e3ed310dcc1e776e"
   integrity sha512-JZOSA7Mo9sNGB8+UjSgzdLtokWAky1zbztM3WRLCbZ70/3cTANmQmOdR7y2g+J0e2WXywy1yS468tY+IruqEww==
 
-bootstrap-sass@3.3.7:
-  version "3.3.7"
-  resolved "https://registry.yarnpkg.com/bootstrap-sass/-/bootstrap-sass-3.3.7.tgz#6596c7ab40f6637393323ab0bc80d064fc630498"
+bootstrap-sass@3.4.1:
+  version "3.4.1"
+  resolved "https://registry.yarnpkg.com/bootstrap-sass/-/bootstrap-sass-3.4.1.tgz#6843c73b1c258a0ac5cb2cc6f6f5285b664a8e9a"
+  integrity sha512-p5rxsK/IyEDQm2CwiHxxUi0MZZtvVFbhWmyMOt4lLkA4bujDA1TGoKT0i1FKIWiugAdP+kK8T5KMDFIKQCLYIA==
 
 boxen@1.1.0, boxen@^1.0.0:
   version "1.1.0"