diff --git a/exporters/otlp/src/otlp_environment.cc b/exporters/otlp/src/otlp_environment.cc
index d653992496..c6d5aaefee 100644
--- a/exporters/otlp/src/otlp_environment.cc
+++ b/exporters/otlp/src/otlp_environment.cc
@@ -2,6 +2,7 @@
 // SPDX-License-Identifier: Apache-2.0
 
 #include <chrono>
+#include <cstdint>
 #include <map>
 #include <string>
 #include <unordered_set>
diff --git a/exporters/otlp/src/otlp_http_exporter.cc b/exporters/otlp/src/otlp_http_exporter.cc
index 997d0ca5eb..69fe9ec48f 100644
--- a/exporters/otlp/src/otlp_http_exporter.cc
+++ b/exporters/otlp/src/otlp_http_exporter.cc
@@ -14,6 +14,7 @@
 #include "opentelemetry/exporters/otlp/otlp_http_exporter_options.h"
 #include "opentelemetry/exporters/otlp/otlp_recordable.h"
 #include "opentelemetry/exporters/otlp/otlp_recordable_utils.h"
+#include "opentelemetry/ext/http/client/http_client.h"
 #include "opentelemetry/nostd/span.h"
 #include "opentelemetry/nostd/string_view.h"
 #include "opentelemetry/sdk/common/exporter_utils.h"
diff --git a/exporters/otlp/src/otlp_http_log_record_exporter.cc b/exporters/otlp/src/otlp_http_log_record_exporter.cc
index bc4fc3c662..f87a488582 100644
--- a/exporters/otlp/src/otlp_http_log_record_exporter.cc
+++ b/exporters/otlp/src/otlp_http_log_record_exporter.cc
@@ -14,6 +14,7 @@
 #include "opentelemetry/exporters/otlp/otlp_http_log_record_exporter_options.h"
 #include "opentelemetry/exporters/otlp/otlp_log_recordable.h"
 #include "opentelemetry/exporters/otlp/otlp_recordable_utils.h"
+#include "opentelemetry/ext/http/client/http_client.h"
 #include "opentelemetry/nostd/span.h"
 #include "opentelemetry/nostd/string_view.h"
 #include "opentelemetry/sdk/common/exporter_utils.h"
diff --git a/exporters/otlp/src/otlp_http_metric_exporter.cc b/exporters/otlp/src/otlp_http_metric_exporter.cc
index 23b1a3e04a..58300c0b06 100644
--- a/exporters/otlp/src/otlp_http_metric_exporter.cc
+++ b/exporters/otlp/src/otlp_http_metric_exporter.cc
@@ -14,6 +14,7 @@
 #include "opentelemetry/exporters/otlp/otlp_http_metric_exporter.h"
 #include "opentelemetry/exporters/otlp/otlp_http_metric_exporter_options.h"
 #include "opentelemetry/exporters/otlp/otlp_metric_utils.h"
+#include "opentelemetry/ext/http/client/http_client.h"
 #include "opentelemetry/nostd/string_view.h"
 #include "opentelemetry/sdk/common/exporter_utils.h"
 #include "opentelemetry/sdk/common/global_log_handler.h"
diff --git a/ext/src/http/client/curl/http_client_curl.cc b/ext/src/http/client/curl/http_client_curl.cc
index 1fb7033ae9..0dc55dcc01 100644
--- a/ext/src/http/client/curl/http_client_curl.cc
+++ b/ext/src/http/client/curl/http_client_curl.cc
@@ -9,7 +9,9 @@
 #include <chrono>
 #include <cstdint>
 #include <cstring>
+#include <deque>
 #include <functional>
+#include <iterator>
 #include <list>
 #include <mutex>
 #include <string>
diff --git a/ext/src/http/client/curl/http_operation_curl.cc b/ext/src/http/client/curl/http_operation_curl.cc
index de04ebb946..73a3a35d08 100644
--- a/ext/src/http/client/curl/http_operation_curl.cc
+++ b/ext/src/http/client/curl/http_operation_curl.cc
@@ -15,6 +15,7 @@
 #include <map>
 #include <memory>
 #include <random>
+#include <ratio>
 #include <sstream>
 #include <string>
 #include <thread>
diff --git a/ext/test/http/curl_http_test.cc b/ext/test/http/curl_http_test.cc
index 05a0bf814b..b067802085 100644
--- a/ext/test/http/curl_http_test.cc
+++ b/ext/test/http/curl_http_test.cc
@@ -4,7 +4,9 @@
 #include <curl/curlver.h>
 #include <gmock/gmock.h>
 #include <gtest/gtest.h>
+
 #include <string.h>
+#include <algorithm>
 #include <atomic>
 #include <chrono>
 #include <condition_variable>
@@ -389,9 +391,9 @@ TEST_F(BasicCurlHttpTests, RetryPolicyDisabled)
 
 TEST_F(BasicCurlHttpTests, ExponentialBackoffRetry)
 {
-  using ::testing::AllOf;
-  using ::testing::Gt;
-  using ::testing::Lt;
+  using testing::AllOf;
+  using testing::Gt;
+  using testing::Lt;
 
   RetryEventHandler handler;
   http_client::HttpSslOptions no_ssl;
diff --git a/sdk/test/common/env_var_test.cc b/sdk/test/common/env_var_test.cc
index e2adf932a7..f2295ba2eb 100644
--- a/sdk/test/common/env_var_test.cc
+++ b/sdk/test/common/env_var_test.cc
@@ -2,7 +2,9 @@
 // SPDX-License-Identifier: Apache-2.0
 
 #include <gtest/gtest.h>
-#include <stdlib.h>
+
+#include <cstdint>
+#include <cstdlib>
 #include <chrono>
 #include <string>