diff --git a/changelog.md b/changelog.md
index b434831244..c2e6179e95 100644
--- a/changelog.md
+++ b/changelog.md
@@ -1,7 +1,22 @@
 
 
+## Roll protocol to r1284279 — _2024-04-09T04:26:29.000Z_
+######  Diff: [`85c9096...0ae54bf`](https://github.com/ChromeDevTools/devtools-protocol/compare/85c9096...0ae54bf)
+
+```diff
+@@ browser_protocol.pdl:2575 @@ domain DOM
+       grammar-error
+       highlight
+       first-line-inherited
++      scroll-marker
++      scroll-markers
+       scrollbar
+       scrollbar-thumb
+       scrollbar-button
+```
+
 ## Roll protocol to r1282316 — _2024-04-04T04:27:08.000Z_
-######  Diff: [`5f4d1e6...0d982b2`](https://github.com/ChromeDevTools/devtools-protocol/compare/5f4d1e6...0d982b2)
+######  Diff: [`5f4d1e6...85c9096`](https://github.com/ChromeDevTools/devtools-protocol/compare/5f4d1e6...85c9096)
 
 ```diff
 @@ browser_protocol.pdl:12123 @@ experimental domain FedCm
@@ -11623,20 +11638,4 @@ index 09c420e..bd277eb 100644
  
    # A unique id for a DevTools inspector issue. Allows other entities (e.g.
    # exceptions, CDP message, console messages, etc.) to reference an issue.
-```
-
-## Roll protocol to r948336 — _2021-12-04T17:15:26.000Z_
-######  Diff: [`11ea32a...dc1b71a`](https://github.com/ChromeDevTools/devtools-protocol/compare/11ea32a...dc1b71a)
-
-```diff
-@@ browser_protocol.pdl:705 @@ experimental domain Audits
-       AttributionEventSourceTriggerDataTooLarge
-       InvalidAttributionSourceExpiry
-       InvalidAttributionSourcePriority
-+      InvalidEventSourceTriggerData
-+      InvalidTriggerPriority
-+      InvalidTriggerDedupKey
- 
-   # Details for issues around "Attribution Reporting API" usage.
-   # Explainer: https://github.com/WICG/conversion-measurement-api
 ```
\ No newline at end of file
diff --git a/json/browser_protocol.json b/json/browser_protocol.json
index 4ff23e6c92..8a944d4ec8 100644
--- a/json/browser_protocol.json
+++ b/json/browser_protocol.json
@@ -5464,6 +5464,8 @@
                         "grammar-error",
                         "highlight",
                         "first-line-inherited",
+                        "scroll-marker",
+                        "scroll-markers",
                         "scrollbar",
                         "scrollbar-thumb",
                         "scrollbar-button",
diff --git a/package.json b/package.json
index f7906b2c8a..07098cba13 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "devtools-protocol",
-  "version": "0.0.1282316",
+  "version": "0.0.1284279",
   "description": "The Chrome DevTools Protocol JSON",
   "repository": "https://github.com/ChromeDevTools/devtools-protocol",
   "author": "The Chromium Authors",
diff --git a/pdl/browser_protocol.pdl b/pdl/browser_protocol.pdl
index 0f2f5a19d1..2069db7a82 100644
--- a/pdl/browser_protocol.pdl
+++ b/pdl/browser_protocol.pdl
@@ -2575,6 +2575,8 @@ domain DOM
       grammar-error
       highlight
       first-line-inherited
+      scroll-marker
+      scroll-markers
       scrollbar
       scrollbar-thumb
       scrollbar-button
diff --git a/scripts/inspector_protocol b/scripts/inspector_protocol
index 916f43c554..64cc230162 160000
--- a/scripts/inspector_protocol
+++ b/scripts/inspector_protocol
@@ -1 +1 @@
-Subproject commit 916f43c554c65ebf4ccd896b0f4e2ac99a67c434
+Subproject commit 64cc2301620c04f0fe0313ae94a9319f003603cf
diff --git a/types/protocol.d.ts b/types/protocol.d.ts
index 537c0fe86c..cfc658397d 100644
--- a/types/protocol.d.ts
+++ b/types/protocol.d.ts
@@ -5916,7 +5916,7 @@ export namespace Protocol {
         /**
          * Pseudo element type.
          */
-        export type PseudoType = ('first-line' | 'first-letter' | 'before' | 'after' | 'marker' | 'backdrop' | 'selection' | 'target-text' | 'spelling-error' | 'grammar-error' | 'highlight' | 'first-line-inherited' | 'scrollbar' | 'scrollbar-thumb' | 'scrollbar-button' | 'scrollbar-track' | 'scrollbar-track-piece' | 'scrollbar-corner' | 'resizer' | 'input-list-button' | 'view-transition' | 'view-transition-group' | 'view-transition-image-pair' | 'view-transition-old' | 'view-transition-new');
+        export type PseudoType = ('first-line' | 'first-letter' | 'before' | 'after' | 'marker' | 'backdrop' | 'selection' | 'target-text' | 'spelling-error' | 'grammar-error' | 'highlight' | 'first-line-inherited' | 'scroll-marker' | 'scroll-markers' | 'scrollbar' | 'scrollbar-thumb' | 'scrollbar-button' | 'scrollbar-track' | 'scrollbar-track-piece' | 'scrollbar-corner' | 'resizer' | 'input-list-button' | 'view-transition' | 'view-transition-group' | 'view-transition-image-pair' | 'view-transition-old' | 'view-transition-new');
 
         /**
          * Shadow root type.