diff --git a/baselines/dom.generated.d.ts b/baselines/dom.generated.d.ts
index 70e23ef78..7e8088099 100644
--- a/baselines/dom.generated.d.ts
+++ b/baselines/dom.generated.d.ts
@@ -969,6 +969,8 @@ interface Keyframe {
 
 interface KeyframeAnimationOptions extends KeyframeEffectOptions {
     id?: string;
+    rangeEnd?: TimelineRangeOffset | CSSNumericValue | CSSKeywordValue | string;
+    rangeStart?: TimelineRangeOffset | CSSNumericValue | CSSKeywordValue | string;
     timeline?: AnimationTimeline | null;
 }
 
@@ -2364,6 +2366,11 @@ interface TextEncoderEncodeIntoResult {
     written: number;
 }
 
+interface TimelineRangeOffset {
+    offset?: CSSNumericValue;
+    rangeName?: string | null;
+}
+
 interface ToggleEventInit extends EventInit {
     newState?: string;
     oldState?: string;
diff --git a/baselines/ts5.5/dom.generated.d.ts b/baselines/ts5.5/dom.generated.d.ts
index 308ad8250..8ec92c988 100644
--- a/baselines/ts5.5/dom.generated.d.ts
+++ b/baselines/ts5.5/dom.generated.d.ts
@@ -966,6 +966,8 @@ interface Keyframe {
 
 interface KeyframeAnimationOptions extends KeyframeEffectOptions {
     id?: string;
+    rangeEnd?: TimelineRangeOffset | CSSNumericValue | CSSKeywordValue | string;
+    rangeStart?: TimelineRangeOffset | CSSNumericValue | CSSKeywordValue | string;
     timeline?: AnimationTimeline | null;
 }
 
@@ -2361,6 +2363,11 @@ interface TextEncoderEncodeIntoResult {
     written: number;
 }
 
+interface TimelineRangeOffset {
+    offset?: CSSNumericValue;
+    rangeName?: string | null;
+}
+
 interface ToggleEventInit extends EventInit {
     newState?: string;
     oldState?: string;
diff --git a/baselines/ts5.6/dom.generated.d.ts b/baselines/ts5.6/dom.generated.d.ts
index 3d8546117..b3f408e80 100644
--- a/baselines/ts5.6/dom.generated.d.ts
+++ b/baselines/ts5.6/dom.generated.d.ts
@@ -966,6 +966,8 @@ interface Keyframe {
 
 interface KeyframeAnimationOptions extends KeyframeEffectOptions {
     id?: string;
+    rangeEnd?: TimelineRangeOffset | CSSNumericValue | CSSKeywordValue | string;
+    rangeStart?: TimelineRangeOffset | CSSNumericValue | CSSKeywordValue | string;
     timeline?: AnimationTimeline | null;
 }
 
@@ -2361,6 +2363,11 @@ interface TextEncoderEncodeIntoResult {
     written: number;
 }
 
+interface TimelineRangeOffset {
+    offset?: CSSNumericValue;
+    rangeName?: string | null;
+}
+
 interface ToggleEventInit extends EventInit {
     newState?: string;
     oldState?: string;
diff --git a/baselines/ts5.9/dom.generated.d.ts b/baselines/ts5.9/dom.generated.d.ts
index 01b293947..d11d7f67c 100644
--- a/baselines/ts5.9/dom.generated.d.ts
+++ b/baselines/ts5.9/dom.generated.d.ts
@@ -966,6 +966,8 @@ interface Keyframe {
 
 interface KeyframeAnimationOptions extends KeyframeEffectOptions {
     id?: string;
+    rangeEnd?: TimelineRangeOffset | CSSNumericValue | CSSKeywordValue | string;
+    rangeStart?: TimelineRangeOffset | CSSNumericValue | CSSKeywordValue | string;
     timeline?: AnimationTimeline | null;
 }
 
@@ -2361,6 +2363,11 @@ interface TextEncoderEncodeIntoResult {
     written: number;
 }
 
+interface TimelineRangeOffset {
+    offset?: CSSNumericValue;
+    rangeName?: string | null;
+}
+
 interface ToggleEventInit extends EventInit {
     newState?: string;
     oldState?: string;
diff --git a/inputfiles/removedTypes.jsonc b/inputfiles/removedTypes.jsonc
index a00827f0e..0b07e10a9 100644
--- a/inputfiles/removedTypes.jsonc
+++ b/inputfiles/removedTypes.jsonc
@@ -210,14 +210,6 @@
                     }
                 }
             },
-            "KeyframeAnimationOptions": {
-                "members": {
-                    "member": {
-                        "rangeEnd": null, // Blink only as of 2023-04
-                        "rangeStart": null // Blink only as of 2023-04
-                    }
-                }
-            },
             "MediaCapabilitiesDecodingInfo": {
                 "members": {
                     "member": {