diff --git a/Package.swift b/Package.swift
index dee08dc..edc64c4 100644
--- a/Package.swift
+++ b/Package.swift
@@ -48,10 +48,7 @@ let package = Package(
         .default(enabledTraits: ["Configuration"]),
     ],
     dependencies: [
-        .package(
-            url: "https://github.com/apple/swift-http-api-proposal.git",
-            revision: "c12fdd4c48953a691b1ce52357101e844e5f0887"
-        ),
+        .package(url: "https://github.com/apple/swift-http-api-proposal.git", from: "0.2.0"),
         .package(url: "https://github.com/apple/swift-distributed-tracing.git", from: "1.4.1"),
         .package(url: "https://github.com/apple/swift-certificates.git", from: "1.19.1"),
         .package(url: "https://github.com/apple/swift-log.git", from: "1.13.2"),
diff --git a/Tests/NIOHTTPServerTests/HTTPKeepAliveHandlerTests.swift b/Tests/NIOHTTPServerTests/HTTPKeepAliveHandlerTests.swift
index 077f0c6..c7d324a 100644
--- a/Tests/NIOHTTPServerTests/HTTPKeepAliveHandlerTests.swift
+++ b/Tests/NIOHTTPServerTests/HTTPKeepAliveHandlerTests.swift
@@ -200,7 +200,9 @@ struct HTTPKeepAliveHandlerTests {
                 }
 
                 // Read the full request body (until .end).
-                let _ = try await reader.collect(upTo: 1024) { _ in }
+                var requestBody = UniqueArray<UInt8>()
+                requestBody.reserveCapacity(1024)
+                _ = try await reader.collect(into: &requestBody)
 
                 // Write the final response.
                 var buffer = UniqueArray(copying: "hello".utf8)
@@ -407,9 +409,11 @@ struct HTTPKeepAliveHandlerTests {
                 _ = await canFinishIterator.next()
 
                 // Drain the request body + end and then write the response body + end.
-                _ = try await reader.collect(upTo: 1024) { _ in }
+                var requestBody = UniqueArray<UInt8>()
+                requestBody.reserveCapacity(1024)
+                _ = try await reader.collect(into: &requestBody)
                 var buffer = UniqueArray(copying: "hello".utf8)
-                try await writer.finish(buffer: &buffer)
+                try await writer.finish(buffer: &buffer, finalElement: nil)
             },
             body: { serverAddress in
                 let client = try await ClientBootstrap(group: .singletonMultiThreadedEventLoopGroup)
diff --git a/Tests/NIOHTTPServerTests/HTTPServerTests.swift b/Tests/NIOHTTPServerTests/HTTPServerTests.swift
index 322af35..1939375 100644
--- a/Tests/NIOHTTPServerTests/HTTPServerTests.swift
+++ b/Tests/NIOHTTPServerTests/HTTPServerTests.swift
@@ -34,16 +34,18 @@ struct HTTPServerTests {
         try await withThrowingTaskGroup { group in
             group.addTask {
                 try await server.serve { request, context, reader, responseSender in
-                    _ = try await reader.collect(upTo: 100) { _ in }
+                    var requestBody = UniqueArray<UInt8>()
+                    requestBody.reserveCapacity(100)
+                    _ = try await reader.collect(into: &requestBody)
                     // Uncommenting this would cause a "reader consumed more than once" error.
-                    //            _ = try await reader.collect(upTo: 100) { _ in }
+                    //            _ = try await reader.collect(into: &requestBody)
 
                     let responseWriter = try await responseSender.send(HTTPResponse(status: .ok))
                     // Uncommenting this would cause a "responseSender consumed more than once" error.
                     //            let responseWriter2 = try await responseSender.send(HTTPResponse(status: .ok))
 
                     var buffer = UniqueArray<UInt8>(copying: [1, 2])
-                    try await responseWriter.finish(buffer: &buffer)
+                    try await responseWriter.finish(buffer: &buffer, finalElement: nil)
 
                     // Uncommenting this would cause a "responseWriter consumed more than once" error.
                     //            try await responseWriter.finish(
diff --git a/Tests/NIOHTTPServerTests/NIOHTTPServerReaderTests.swift b/Tests/NIOHTTPServerTests/NIOHTTPServerReaderTests.swift
index 30a2b0f..2546664 100644
--- a/Tests/NIOHTTPServerTests/NIOHTTPServerReaderTests.swift
+++ b/Tests/NIOHTTPServerTests/NIOHTTPServerReaderTests.swift
@@ -181,15 +181,25 @@ struct NIOHTTPServerReaderTests {
                 readerState: .init(iterator: stream.makeAsyncIterator())
             )
 
+            var buffer = UniqueArray<UInt8>()
+            buffer.reserveCapacity(9)
             do {
-                _ = try await requestReader.collect(upTo: 9) { _ in }
-            } catch let eitherEitherError
-                as EitherError<EitherError<Error, AsyncReaderLeftOverElementsError>, Never>
+                _ = try await requestReader.collect(exactlyInto: &buffer)
+            } catch let error
+                as EitherError<
+                    any Error,
+                    EitherError<AsyncReaderLeftOverElementsError, AsyncReaderInsufficientElementsError>
+                >
             {
                 do {
-                    try eitherEitherError.unwrap()
-                } catch let eitherError as EitherError<Error, AsyncReaderLeftOverElementsError> {
-                    try eitherError.unwrap()
+                    try error.unwrap()
+                } catch let inner
+                    as EitherError<
+                        AsyncReaderLeftOverElementsError,
+                        AsyncReaderInsufficientElementsError
+                    >
+                {
+                    try inner.unwrap()
                 }
             }
         }
diff --git a/Tests/NIOHTTPServerTests/NIOHTTPServerTests.swift b/Tests/NIOHTTPServerTests/NIOHTTPServerTests.swift
index 2f01ff5..47a03fe 100644
--- a/Tests/NIOHTTPServerTests/NIOHTTPServerTests.swift
+++ b/Tests/NIOHTTPServerTests/NIOHTTPServerTests.swift
@@ -78,11 +78,11 @@ struct NIOHTTPServerTests {
             serverHandler: HTTPServerClosureRequestHandler { request, requestContext, reader, responseWriter in
                 #expect(request == Self.makeRequest(method: .post, scheme: "http", for: .http1_1))
 
-                let (buffer, finalElement) = try await reader.collect(upTo: Self.bodyData.readableBytes + 1) { body in
-                    var buffer = ByteBuffer()
-                    buffer.writeBytes(body.span.bytes)
-                    return buffer
-                }
+                var collected = UniqueArray<UInt8>()
+                collected.reserveCapacity(Self.bodyData.readableBytes + 1)
+                let finalElement = try await reader.collect(into: &collected)
+                var buffer = ByteBuffer()
+                buffer.writeBytes(collected.span.bytes)
                 #expect(buffer == Self.bodyData)
                 #expect(finalElement == Self.trailer)
 
@@ -146,12 +146,11 @@ struct NIOHTTPServerTests {
                     let peerChain = try #require(try await NIOHTTPServer.connectionContext.peerCertificateChain)
                     #expect(Array(peerChain) == [clientChain.leaf])
 
-                    let (buffer, finalElement) = try await reader.collect(upTo: Self.bodyData.readableBytes + 1) {
-                        body in
-                        var buffer = ByteBuffer()
-                        buffer.writeBytes(body.span.bytes)
-                        return buffer
-                    }
+                    var collected = UniqueArray<UInt8>()
+                    collected.reserveCapacity(Self.bodyData.readableBytes + 1)
+                    let finalElement = try await reader.collect(into: &collected)
+                    var buffer = ByteBuffer()
+                    buffer.writeBytes(collected.span.bytes)
                     #expect(buffer == Self.bodyData)
                     #expect(finalElement == Self.trailer)
 
@@ -982,9 +981,11 @@ extension NIOHTTPServerTests {
         sender: consuming NIOHTTPServer.ResponseSender
     ) async throws {
         var buffer = UniqueArray<UInt8>()
-        let (_, trailer) = try await reader.collect(upTo: limit) { inputSpan in
-            buffer.append(copying: inputSpan)
-        }
+        // Reserve one extra byte beyond the limit: `collect(into:)` stops as soon as the buffer's
+        // free capacity is exhausted, so an exact fit would drop the trailing fields delivered in
+        // the terminal chunk.
+        buffer.reserveCapacity(limit + 1)
+        let trailer = try await reader.collect(into: &buffer)
         try await sender.sendAndFinish(.init(status: .ok), buffer: &buffer, trailer: trailer)
     }
 }