diff --git a/dist/index.d.ts b/dist/index.d.ts
index 94b0b72..5077012 100644
--- a/dist/index.d.ts
+++ b/dist/index.d.ts
@@ -1099,10 +1099,7 @@ interface GPUPipelineLayoutDescriptor
     | undefined
   >;
   /**
-   * The size in bytes of the immediate data range.
-   *
-   * **PROPOSED** in [Immediates](https://github.com/gpuweb/gpuweb/pull/5423).
-   * Check support before using. (Use the non-null assertion operator `!` where needed.)
+   * The size, in bytes, of the immediate data range used by the pipeline.
    */
   immediateSize?: GPUSize32;
 }
@@ -1951,22 +1948,19 @@ interface GPUBindingCommandsMixin {
     dynamicOffsetsDataLength: GPUSize32
   ): undefined;
   /**
-   * Sets immediate data for subsequent render or compute commands
+   * Sets immediate data for subsequent render or compute commands.
    * @param rangeOffset - Offset in bytes into the immediate data range to begin writing at.
    * @param data - Data to write into the immediate data range.
    * @param dataOffset - Offset into `data` to begin writing from. Given in elements if
-   *  `data` is a `TypedArray` and bytes otherwise. Defaults to 0.
-   * @param size - Size of content to write from `data` to `buffer`. Given in elements if
-   * 	`data` is a `TypedArray` and bytes otherwise.
-   *
-   * **PROPOSED** in [Immediates](https://github.com/gpuweb/gpuweb/pull/5423).
-   * Check support before using. (Use the non-null assertion operator `!` where needed.)
+   * 	`data` is a {@link TypedArray} and bytes otherwise.
+   * @param dataSize - Size of content to write from `data`. Given in elements if
+   * 	`data` is a {@link TypedArray} and bytes otherwise.
    */
-  setImmediates?(
+  setImmediates(
     rangeOffset: GPUSize32,
     data: GPUAllowSharedBufferSource,
     dataOffset?: GPUSize64,
-    size?: GPUSize64
+    dataSize?: GPUSize64
   ): undefined;
 }
 
@@ -3240,11 +3234,7 @@ interface GPUSupportedLimits {
   readonly maxComputeWorkgroupSizeY: number;
   readonly maxComputeWorkgroupSizeZ: number;
   readonly maxComputeWorkgroupsPerDimension: number;
-  /**
-   * **PROPOSED** in [Immediates](https://github.com/gpuweb/gpuweb/pull/5423).
-   * Check support before using. (Use the non-null assertion operator `!` where needed.)
-   */
-  readonly maxImmediateSize?: number;
+  readonly maxImmediateSize: number;
 }
 
 declare var GPUSupportedLimits: {
diff --git a/generated/index.d.ts b/generated/index.d.ts
index 851e45d..7475eb9 100644
--- a/generated/index.d.ts
+++ b/generated/index.d.ts
@@ -1098,6 +1098,10 @@ interface GPUPipelineLayoutDescriptor
     | null
     | undefined
   >;
+  /**
+   * The size, in bytes, of the immediate data range used by the pipeline.
+   */
+  immediateSize?: GPUSize32;
 }
 
 interface GPUPrimitiveState {
@@ -1899,6 +1903,21 @@ interface GPUBindingCommandsMixin {
     dynamicOffsetsDataStart: GPUSize64,
     dynamicOffsetsDataLength: GPUSize32
   ): undefined;
+  /**
+   * Sets immediate data for subsequent render or compute commands.
+   * @param rangeOffset - Offset in bytes into the immediate data range to begin writing at.
+   * @param data - Data to write into the immediate data range.
+   * @param dataOffset - Offset into `data` to begin writing from. Given in elements if
+   * 	`data` is a {@link TypedArray} and bytes otherwise.
+   * @param dataSize - Size of content to write from `data`. Given in elements if
+   * 	`data` is a {@link TypedArray} and bytes otherwise.
+   */
+  setImmediates(
+    rangeOffset: GPUSize32,
+    data: GPUAllowSharedBufferSource,
+    dataOffset?: GPUSize64,
+    dataSize?: GPUSize64
+  ): undefined;
 }
 
 interface GPUCommandsMixin {}
@@ -2860,8 +2879,8 @@ interface GPURenderPassEncoder
    * Executes the commands previously recorded into the given {@link GPURenderBundle}s as part of
    * this render pass.
    * When a {@link GPURenderBundle} is executed, it does not inherit the render pass's pipeline, bind
-   * groups, or vertex and index buffers. After a {@link GPURenderBundle} has executed, the render
-   * pass's pipeline, bind group, and vertex/index buffer state is cleared
+   * groups, immediate data, or vertex and index buffers. After a {@link GPURenderBundle} has executed, the render
+   * pass's pipeline, bind group, immediate data, and vertex/index buffer state is cleared
    * (to the initial, empty values).
    * Note: The state is cleared, not restored to the previous state.
    * This occurs even if zero {@link GPURenderBundle | GPURenderBundles} are executed.
@@ -2933,6 +2952,7 @@ interface GPUSupportedLimits {
   readonly maxTextureArrayLayers: number;
   readonly maxBindGroups: number;
   readonly maxBindGroupsPlusVertexBuffers: number;
+  readonly maxImmediateSize: number;
   readonly maxBindingsPerBindGroup: number;
   readonly maxDynamicUniformBuffersPerPipelineLayout: number;
   readonly maxDynamicStorageBuffersPerPipelineLayout: number;
diff --git a/gpuweb b/gpuweb
index 7e38318..6bf9e46 160000
--- a/gpuweb
+++ b/gpuweb
@@ -1 +1 @@
-Subproject commit 7e3831803c26ae169bebfb6750204c94a7b9797e
+Subproject commit 6bf9e4611a95afe51a519132b31e025217507d3d