diff --git a/.changeset/sweet-apples-fetch.md b/.changeset/sweet-apples-fetch.md
new file mode 100644
index 000000000..20ee7be52
--- /dev/null
+++ b/.changeset/sweet-apples-fetch.md
@@ -0,0 +1,5 @@
+---
+'@hashicorp/react-subnav': patch
+---
+
+Attempts to fix overflow issue that causes layout shift on dot-io sites.
diff --git a/packages/subnav/style.module.css b/packages/subnav/style.module.css
index 34e6a4a4d..e9494fb4c 100644
--- a/packages/subnav/style.module.css
+++ b/packages/subnav/style.module.css
@@ -7,6 +7,7 @@
   background: var(--background-color); /* from theme.module.css */
   border-top: 1px solid var(--border-color); /* from theme.module.css */
   border-bottom: 1px solid transparent;
+  overflow: hidden;
   transition: border-bottom-color 0.8s;
 
   &.isSticky {