diff --git a/aws-common-runtime/aws-c-common b/aws-common-runtime/aws-c-common
index f6f914598..6c784947f 160000
--- a/aws-common-runtime/aws-c-common
+++ b/aws-common-runtime/aws-c-common
@@ -1 +1 @@
-Subproject commit f6f9145982f60ce2c92f9f0f2796b1b150e6f991
+Subproject commit 6c784947fa16ef66a1328cf44c910375a41aacdc
diff --git a/aws-common-runtime/aws-c-http b/aws-common-runtime/aws-c-http
index b53100ee4..b5587a87a 160000
--- a/aws-common-runtime/aws-c-http
+++ b/aws-common-runtime/aws-c-http
@@ -1 +1 @@
-Subproject commit b53100ee427a3618c1692e7ca8aaa1f2cbeb4109
+Subproject commit b5587a87ac942eb6ff5653f4b4b1ca958cbe6b68
diff --git a/aws-common-runtime/aws-c-io b/aws-common-runtime/aws-c-io
index cf9dbd744..2f080d442 160000
--- a/aws-common-runtime/aws-c-io
+++ b/aws-common-runtime/aws-c-io
@@ -1 +1 @@
-Subproject commit cf9dbd744f56eccc00bd3f9c4e7ba283949e1a28
+Subproject commit 2f080d4427c2b1aaa0e998c86887c37f48abb40b
diff --git a/src/native/crt.c b/src/native/crt.c
index 777af91b3..7baad43f4 100644
--- a/src/native/crt.c
+++ b/src/native/crt.c
@@ -12,6 +12,7 @@
 #include <aws/common/thread.h>
 #include <aws/http/connection.h>
 #include <aws/http/http.h>
+#include <aws/io/channel.h>
 #include <aws/io/io.h>
 #include <aws/io/logging.h>
 #include <aws/io/tls_channel_handler.h>
@@ -217,6 +218,8 @@ static void s_jni_atexit(void) {
     }
 }
 
+#define KB_256 (256 * 1024)
+
 /* Called as the entry point, immediately after the shared lib is loaded the first time by JNI */
 JNIEXPORT
 void JNICALL Java_software_amazon_awssdk_crt_CRT_awsCrtInit(
@@ -235,6 +238,12 @@ void JNICALL Java_software_amazon_awssdk_crt_CRT_awsCrtInit(
 
     g_memory_tracing = jni_memtrace;
 
+    /*
+     * Increase the maximum channel message size in order to improve throughput on large payloads.
+     * Consider adding a system property override in the future.
+     */
+    g_aws_channel_max_fragment_size = KB_256;
+
     /* check to see if we have support for backtraces only if we need to */
     void *stack[1];
     if (g_memory_tracing > 1 && 0 == aws_backtrace(stack, 1)) {
diff --git a/src/native/http_connection_manager.c b/src/native/http_connection_manager.c
index 691b9db20..bb4e1d3bd 100644
--- a/src/native/http_connection_manager.c
+++ b/src/native/http_connection_manager.c
@@ -114,7 +114,7 @@ void aws_http_proxy_options_jni_clean_up(
     }
 
     if (options->tls_options != NULL) {
-        aws_tls_connection_options_clean_up(options->tls_options);
+        aws_tls_connection_options_clean_up((struct aws_tls_connection_options *)options->tls_options);
     }
 }