diff --git a/composer.json b/composer.json
index 44fa76e..c472763 100644
--- a/composer.json
+++ b/composer.json
@@ -1,5 +1,5 @@
 {
   "name": "isubit/iastate_theme",
   "type": "drupal-theme",
-  "description": "Drupal 8 theme for Iowa State University websites"
+  "description": "Drupal 9 theme for Iowa State University websites"
 }
diff --git a/css/base.css b/css/base.css
index 442207b..18b5669 100644
--- a/css/base.css
+++ b/css/base.css
@@ -1,7 +1,7 @@
 /**
  * @file
  * Base CSS styles for the ISU theme, primarily for directly overriding
- * styles from Drupal 8 core or Bootstrap 4, including replacing some
+ * styles from Drupal core or Bootstrap 4, including replacing some
  * Bootstrap 4 colors with ISU brand colors, and tweaking colors to meet
  * WCAG AA color contrast guidelines.
  */
@@ -267,7 +267,7 @@ img {
 table img {
   max-width: none; /* Prevents images from shrinking in tables */
 }
-.caption-img figcaption { /* Class from Drupal 8. */
+.caption-img figcaption { /* Class from Drupal. */
   /* Same as table caption. */
   padding: 0.5rem;
   color: #333333;
diff --git a/css/theme.css b/css/theme.css
index 1e2298a..5287652 100644
--- a/css/theme.css
+++ b/css/theme.css
@@ -413,7 +413,7 @@ body,
 /* --- ## Site Links Menu --- */
 /*
  * Markup found in menu--site-links.html.twig
- * Show/hide/rearrange menu in Drupal 8 Structure > Menus.
+ * Show/hide/rearrange menu in Structure > Menus.
  */
 
 .isu-sitelinks {
@@ -650,7 +650,7 @@ body,
   text-decoration: none;
 }
 /* The Full Pager uses .active for the current page */
-.page-item.active .isu-page-link { /* .page-item via Drupal 8 */
+.page-item.active .isu-page-link { /* .page-item via Drupal */
   background-color: #cc0000;
   border-color: #cc0000
 }
@@ -680,7 +680,7 @@ article:not(.isu-user):not(.isu-search_collapse) {
   font-size: 2rem;
 }
 
-.node-form .isu-page-title .placeholder { /* placeholder class via Drupal 8 */
+.node-form .isu-page-title .placeholder { /* placeholder class via Drupal */
   font-weight: bold;
 }
 
@@ -821,20 +821,20 @@ article:not(.isu-user):not(.isu-search_collapse) {
 /* --- ## Links --- */
 /*
  * Not, like, regular links, but the buttons that do stuff
- * generated by Drupal 8
+ * generated by Drupal
  */
 
 .isu-links {
   margin-top: 1rem;
   margin-bottom: 0;
 }
-.isu-links .comment-forbidden { /* .comment-forbidden via Drupal 8 */
+.isu-links .comment-forbidden { /* .comment-forbidden via Drupal */
   margin-top: 1rem;
 }
-.isu-links.contextual-links li { /* .contextual-links via Drupal 8 */
+.isu-links.contextual-links li { /* .contextual-links via Drupal */
   display: block;
 }
-.action-links { /* .action-links via Drupal 8 */
+.action-links { /* .action-links via Drupal */
   list-style-type: none;
   padding-left: 0;
 }
@@ -849,7 +849,7 @@ div[id$="local-actions"] nav {
  * Mimics Bootstrap 4 .alert.alert-warning
  */
 
-.tabledrag-changed-warning { /* Class via Drupal 8 */
+.tabledrag-changed-warning { /* Class via Drupal */
   padding: 0.75rem 1.25rem;
   margin-bottom: 1rem;
   border: 1px solid transparent;
@@ -860,7 +860,7 @@ div[id$="local-actions"] nav {
   border-color: #ffeeba;
 }
 
-abbr[title].tabledrag-changed { /* Class via Drupal 8 */
+abbr[title].tabledrag-changed { /* Class via Drupal */
   padding: 0.25rem;
   border: 1px solid transparent;
   border-radius: .25rem;
@@ -899,11 +899,11 @@ abbr[title].tabledrag-changed { /* Class via Drupal 8 */
   font-size: 0.85rem;
 }
 .indented {
-  /* .indented via Drupal 8. Used to nest comments and forum boards. */
+  /* .indented via Drupal. Used to nest comments and forum boards. */
   margin-left: 4rem;
 }
 .field--name-comment-body .isu-form-group {
-  /* .field--name-comment-body via Drupal 8 */
+  /* .field--name-comment-body via Drupal */
   margin-bottom: 0;
 }
 
@@ -911,7 +911,7 @@ abbr[title].tabledrag-changed { /* Class via Drupal 8 */
 /* ## FORMS
 /* --------------------------------------  */
 
-.form-required:after { /* .form-required from Drupal 8 */
+.form-required:after { /* .form-required from Drupal */
   content: "*";
   margin-left: 0.25rem;
   color: #cc0000;
@@ -932,7 +932,7 @@ details {
   width: auto;
   max-width: 100%;
 }
-.isu-form-control.error { /* .error via Drupal 8 */
+.isu-form-control.error { /* .error via Drupal */
   border: 1px solid #cc0000;
 }
 
@@ -952,7 +952,7 @@ details {
 .isu-form-type_date label,
 .isu-form-type_number label,
 .field--type-datetime label {
-  /* .filter-wrapper via Drupal 8 */
+  /* .filter-wrapper via Drupal */
   font-weight: 700;
 }
 
@@ -1020,7 +1020,7 @@ details {
     border-color: #6c757d;
   }
 
-.text-summary-wrapper { /* class via Drupal 8 */
+.text-summary-wrapper { /* class via Drupal */
   margin-bottom: 1rem;
 }
 
@@ -1053,7 +1053,7 @@ details {
 }
 
 /* --- ## Text fields with text format filter --- */
-/* .js-text-format-wrapper and .filter-wrapper via Drupal 8 */
+/* .js-text-format-wrapper and .filter-wrapper via Drupal */
 
 .js-text-format-wrapper .isu-form-group.isu-form-type_textarea {
   margin-bottom: 0;
@@ -1179,7 +1179,7 @@ details {
 /* --- ## Dropbutton Widget --- */
 /*
  * Powerful CSS to manually style the dropbuttons.
- * All classes via Drupal 8
+ * All classes via Drupal
  */
 
 .form-actions:after {
@@ -1573,7 +1573,7 @@ img:not(.isu-wordmark-logo_default):not(.isu-wordmark-logo_custom):not(.isu-foot
 .isu-block_help p:last-of-type {
   margin-bottom: 0
 }
-.container-inline { /* class via Drupal 8 */
+.container-inline { /* class via Drupal */
   display: flex;
   align-items: flex-end;
   flex-wrap: wrap;
diff --git a/iastate_theme.info.yml b/iastate_theme.info.yml
index 6a55ec1..f4df7e4 100644
--- a/iastate_theme.info.yml
+++ b/iastate_theme.info.yml
@@ -1,9 +1,9 @@
 name: IASTATE Theme
-description: Drupal 8 theme for Iowa State University websites
+description: Drupal 9 theme for Iowa State University websites
 type: theme
 core: 8.x
 core_version_requirement: ^8 || ^9
-version: "1.7.2"
+version: "1.7.3"
 base theme: stable
 libraries: 
   - iastate_theme/global-css