diff --git a/components/dash-html-components/scripts/data/attributes.json b/components/dash-html-components/scripts/data/attributes.json
index 356583979a..b426737bdb 100644
--- a/components/dash-html-components/scripts/data/attributes.json
+++ b/components/dash-html-components/scripts/data/attributes.json
@@ -248,28 +248,28 @@
                 "button",
                 "input"
             ],
-            "description": "If the button/input is a submit button (e.g. type=\"submit\"), this attribute sets the encoding type to use during form submission. If this attribute is specified, it overrides the enctype attribute of the button's form owner."
+            "description": "If the button/input is a submit button (e.g., type=\"submit\"), this attribute sets the encoding type to use during form submission. If this attribute is specified, it overrides the enctype attribute of the button's form owner."
         },
         "formMethod": {
             "elements": [
                 "button",
                 "input"
             ],
-            "description": "If the button/input is a submit button (e.g. type=\"submit\"), this attribute sets the submission method to use during form submission (GET, POST, etc.). If this attribute is specified, it overrides the method attribute of the button's form owner."
+            "description": "If the button/input is a submit button (e.g., type=\"submit\"), this attribute sets the submission method to use during form submission (GET, POST, etc.). If this attribute is specified, it overrides the method attribute of the button's form owner."
         },
         "formNoValidate": {
             "elements": [
                 "button",
                 "input"
             ],
-            "description": "If the button/input is a submit button (e.g. type=\"submit\"), this boolean attribute specifies that the form is not to be validated when it is submitted. If this attribute is specified, it overrides the novalidate attribute of the button's form owner."
+            "description": "If the button/input is a submit button (e.g., type=\"submit\"), this boolean attribute specifies that the form is not to be validated when it is submitted. If this attribute is specified, it overrides the novalidate attribute of the button's form owner."
         },
         "formTarget": {
             "elements": [
                 "button",
                 "input"
             ],
-            "description": "If the button/input is a submit button (e.g. type=\"submit\"), this attribute specifies the browsing context (for example, tab, window, or inline frame) in which to display the response that is received after submitting the form. If this attribute is specified, it overrides the target attribute of the button's form owner."
+            "description": "If the button/input is a submit button (e.g., type=\"submit\"), this attribute specifies the browsing context (for example, tab, window, or inline frame) in which to display the response that is received after submitting the form. If this attribute is specified, it overrides the target attribute of the button's form owner."
         },
         "headers": {
             "elements": [
diff --git a/components/dash-html-components/scripts/extract-elements.js b/components/dash-html-components/scripts/extract-elements.js
index 4aa4d1b9dd..72a37f0486 100644
--- a/components/dash-html-components/scripts/extract-elements.js
+++ b/components/dash-html-components/scripts/extract-elements.js
@@ -22,7 +22,8 @@ function extractElements($) {
         'noframes',
         // experimental, don't add yet
         'portal',
-        'fencedframe'
+        'fencedframe',
+        'selectedcontent',
     ];
     // `<section>` is for some reason missing from the reference tables.
     const addElements = [
diff --git a/requirements/celery.txt b/requirements/celery.txt
index 0696a73b3c..b0bcdb3a17 100644
--- a/requirements/celery.txt
+++ b/requirements/celery.txt
@@ -1,3 +1,3 @@
 # Dependencies used by the CeleryLongCallbackManager
-redis>=3.5.3
-celery[redis]>=5.1.2
+redis>=3.5.3,<6.0.0
+celery[redis]>=5.1.2,<=5.4.0