diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 24c83f752..f76cdcd25 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -84,11 +84,11 @@ jobs:
 
       - name: Make target directories
         if: github.event_name != 'pull_request' && (startsWith(github.ref, 'refs/tags/v') || github.ref == 'refs/heads/main')
-        run: mkdir -p testkit/metrics/jvm/target java/metrics/target sdk-exporter/common/.js/target testkit/common/jvm/target sdk/common/.native/target sdk/common/.js/target core/trace/.js/target semconv/.jvm/target sdk/trace/.js/target core/common/.jvm/target sdk-exporter/common/.native/target java/trace/target sdk-exporter/trace/.jvm/target unidocs/target core/metrics/.native/target core/all/.native/target core/metrics/.jvm/target core/all/.js/target java/all/target sdk/all/.native/target java/common/target core/metrics/.js/target core/all/.jvm/target sdk-exporter/trace/.native/target sdk/common/.jvm/target core/trace/.native/target sdk/trace/.native/target semconv/.js/target core/trace/.jvm/target sdk-exporter/common/.jvm/target sdk-exporter/trace/.js/target core/common/.native/target core/common/.js/target semconv/.native/target testkit/all/jvm/target sdk/all/.js/target sdk/all/.jvm/target sdk/trace/.jvm/target project/target
+        run: mkdir -p testkit/metrics/jvm/target java/metrics/target sdk-exporter/common/.js/target testkit/common/jvm/target sdk/common/.native/target sdk/common/.js/target core/trace/.js/target semconv/.jvm/target sdk/trace/.js/target core/common/.jvm/target sdk-exporter/common/.native/target java/trace/target sdk-exporter/trace/.jvm/target unidocs/target core/metrics/.native/target core/all/.native/target core/metrics/.jvm/target core/all/.js/target sdk-exporter/proto/.jvm/target sdk-exporter/proto/.js/target java/all/target sdk/all/.native/target java/common/target core/metrics/.js/target core/all/.jvm/target sdk-exporter/trace/.native/target sdk/common/.jvm/target core/trace/.native/target sdk/trace/.native/target semconv/.js/target sdk-exporter/proto/.native/target core/trace/.jvm/target sdk-exporter/common/.jvm/target sdk-exporter/trace/.js/target core/common/.native/target core/common/.js/target semconv/.native/target testkit/all/jvm/target sdk/all/.js/target sdk/all/.jvm/target sdk/trace/.jvm/target project/target
 
       - name: Compress target directories
         if: github.event_name != 'pull_request' && (startsWith(github.ref, 'refs/tags/v') || github.ref == 'refs/heads/main')
-        run: tar cf targets.tar testkit/metrics/jvm/target java/metrics/target sdk-exporter/common/.js/target testkit/common/jvm/target sdk/common/.native/target sdk/common/.js/target core/trace/.js/target semconv/.jvm/target sdk/trace/.js/target core/common/.jvm/target sdk-exporter/common/.native/target java/trace/target sdk-exporter/trace/.jvm/target unidocs/target core/metrics/.native/target core/all/.native/target core/metrics/.jvm/target core/all/.js/target java/all/target sdk/all/.native/target java/common/target core/metrics/.js/target core/all/.jvm/target sdk-exporter/trace/.native/target sdk/common/.jvm/target core/trace/.native/target sdk/trace/.native/target semconv/.js/target core/trace/.jvm/target sdk-exporter/common/.jvm/target sdk-exporter/trace/.js/target core/common/.native/target core/common/.js/target semconv/.native/target testkit/all/jvm/target sdk/all/.js/target sdk/all/.jvm/target sdk/trace/.jvm/target project/target
+        run: tar cf targets.tar testkit/metrics/jvm/target java/metrics/target sdk-exporter/common/.js/target testkit/common/jvm/target sdk/common/.native/target sdk/common/.js/target core/trace/.js/target semconv/.jvm/target sdk/trace/.js/target core/common/.jvm/target sdk-exporter/common/.native/target java/trace/target sdk-exporter/trace/.jvm/target unidocs/target core/metrics/.native/target core/all/.native/target core/metrics/.jvm/target core/all/.js/target sdk-exporter/proto/.jvm/target sdk-exporter/proto/.js/target java/all/target sdk/all/.native/target java/common/target core/metrics/.js/target core/all/.jvm/target sdk-exporter/trace/.native/target sdk/common/.jvm/target core/trace/.native/target sdk/trace/.native/target semconv/.js/target sdk-exporter/proto/.native/target core/trace/.jvm/target sdk-exporter/common/.jvm/target sdk-exporter/trace/.js/target core/common/.native/target core/common/.js/target semconv/.native/target testkit/all/jvm/target sdk/all/.js/target sdk/all/.jvm/target sdk/trace/.jvm/target project/target
 
       - name: Upload target directories
         if: github.event_name != 'pull_request' && (startsWith(github.ref, 'refs/tags/v') || github.ref == 'refs/heads/main')
diff --git a/sdk-exporter/trace/src/main/scala/org/typelevel/otel4s/sdk/exporter/otlp/OtlpHttpSpanExporter.scala b/sdk-exporter/trace/src/main/scala/org/typelevel/otel4s/sdk/exporter/otlp/OtlpHttpSpanExporter.scala
index c05520ab4..f57dd995f 100644
--- a/sdk-exporter/trace/src/main/scala/org/typelevel/otel4s/sdk/exporter/otlp/OtlpHttpSpanExporter.scala
+++ b/sdk-exporter/trace/src/main/scala/org/typelevel/otel4s/sdk/exporter/otlp/OtlpHttpSpanExporter.scala
@@ -31,6 +31,7 @@ import io.opentelemetry.proto.collector.trace.v1.trace_service.ExportTraceServic
 import org.http4s.EntityEncoder
 import org.http4s.Header
 import org.http4s.Headers
+import org.http4s.HttpVersion
 import org.http4s.Method
 import org.http4s.Request
 import org.http4s.Response
@@ -66,7 +67,7 @@ final class OtlpHttpSpanExporter[F[_]: Temporal: Console] private (
     }
 
   def exportSpans(spans: List[SpanData]): F[Unit] = {
-    val request = Request[F](Method.POST, config.endpoint)
+    val request = Request[F](Method.POST, config.endpoint, HttpVersion.`HTTP/2`)
       .withEntity(spans)
       .putHeaders(config.headers)
 
diff --git a/sdk-exporter/trace/src/main/scala/org/typelevel/otel4s/sdk/exporter/otlp/ProtoCodecs.scala b/sdk-exporter/trace/src/main/scala/org/typelevel/otel4s/sdk/exporter/otlp/ProtoCodecs.scala
index e80a6fef0..477822e71 100644
--- a/sdk-exporter/trace/src/main/scala/org/typelevel/otel4s/sdk/exporter/otlp/ProtoCodecs.scala
+++ b/sdk-exporter/trace/src/main/scala/org/typelevel/otel4s/sdk/exporter/otlp/ProtoCodecs.scala
@@ -1,3 +1,19 @@
+/*
+ * Copyright 2023 Typelevel
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package org.typelevel.otel4s
 package sdk.exporter.otlp