diff --git a/.gitmodules b/.gitmodules
index 00a446f..0648662 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -1,3 +1,4 @@
 [submodule "sass/bootstrap"]
 	path = sass/bootstrap
 	url = https://github.com/twbs/bootstrap.git
+	branch = v4-dev
diff --git a/sass/bootstrap b/sass/bootstrap
index a277c12..d8b1b92 160000
--- a/sass/bootstrap
+++ b/sass/bootstrap
@@ -1 +1 @@
-Subproject commit a277c1221440df30fcb764d628296cf14fba687c
+Subproject commit d8b1b92f66d57ac888f7ab49ca236b7acfa47a2e