diff --git a/web/gui/src/main/webapp/app/fw/nav/nav.css b/web/gui/src/main/webapp/app/fw/nav/nav.css
index 3d2f646..7413fdf 100644
--- a/web/gui/src/main/webapp/app/fw/nav/nav.css
+++ b/web/gui/src/main/webapp/app/fw/nav/nav.css
@@ -24,6 +24,8 @@
     left: 0;
     padding: 0;
     z-index: 3000;
+    max-height: 90%;
+    overflow-y: auto;
     visibility: hidden;
 }
 
diff --git a/web/gui2/src/main/webapp/app/nav/nav.component.css b/web/gui2/src/main/webapp/app/nav/nav.component.css
index 5030be8..d7471c4 100644
--- a/web/gui2/src/main/webapp/app/nav/nav.component.css
+++ b/web/gui2/src/main/webapp/app/nav/nav.component.css
@@ -24,6 +24,8 @@
     left: 0;
     padding: 0;
     z-index: 3000;
+    max-height: 90%;
+    overflow-y: auto;
 }
 
 html[data-platform='iPad'] #nav {