diff --git a/lib/resources/script.js b/lib/resources/script.js
index 190a000f17..e88f030646 100644
--- a/lib/resources/script.js
+++ b/lib/resources/script.js
@@ -1,3 +1,8 @@
+/*
+ *
+ * Update script.js versions in all lib/templates when modifying this file!
+ *
+ */
function initSideNav() {
const leftNavToggle = document.getElementById('sidenav-left-toggle');
const leftDrawer = document.querySelector('.sidebar-offcanvas-left');
diff --git a/lib/resources/styles.css b/lib/resources/styles.css
index ece7755808..7ea04df379 100644
--- a/lib/resources/styles.css
+++ b/lib/resources/styles.css
@@ -1,3 +1,8 @@
+/*
+ *
+ * Update styles.css versions in all lib/templates when modifying this file!
+ *
+ */
/* Palette generated by Material Palette - materialpalette.com/blue/cyan */
diff --git a/lib/templates/html/_footer.html b/lib/templates/html/_footer.html
index 906ebeb633..34989bb9b1 100644
--- a/lib/templates/html/_footer.html
+++ b/lib/templates/html/_footer.html
@@ -12,8 +12,9 @@
{{! TODO(jdkoren): unwrap ^useBaseHref sections when the option is removed.}}
-
-
+{{! **Update versions for static assets when changed to force browsers to refresh them.** }}
+
+
{{{ customFooter }}}
diff --git a/lib/templates/html/_head.html b/lib/templates/html/_head.html
index 17039906b7..e6c769f45f 100644
--- a/lib/templates/html/_head.html
+++ b/lib/templates/html/_head.html
@@ -24,9 +24,10 @@
-
-
-
+ {{! **Update versions for static assets when changed to force browsers to refresh them.** }}
+
+
+
{{{ customHeader }}}