diff --git a/ports/aws-c-event-stream/portfile.cmake b/ports/aws-c-event-stream/portfile.cmake
index b5b142f0e3..a75a2c42f9 100644
--- a/ports/aws-c-event-stream/portfile.cmake
+++ b/ports/aws-c-event-stream/portfile.cmake
@@ -2,7 +2,7 @@ vcpkg_from_github(
     OUT_SOURCE_PATH SOURCE_PATH
     REPO awslabs/aws-c-event-stream
     REF "v${VERSION}"
-    SHA512 87867d9c8ad7058e433ebcdfddb762c92d6abd3fe61a5332bf18e9a5fa98930181615417d4aeecb4118b5eb27c12afc8f21ab740d3b81f07bc86e9a7e0ecc3b4
+    SHA512 dcfbfa4cfd38ec6fa7714813e00ed67df915554c028053803b8b1a779da797aef06e38add974b063175614b22be54cb72525f25a2a0ea6f9a53edcdf318bf677
     HEAD_REF master
 )
 
diff --git a/ports/aws-c-event-stream/vcpkg.json b/ports/aws-c-event-stream/vcpkg.json
index ce72088954..d5387c03e1 100644
--- a/ports/aws-c-event-stream/vcpkg.json
+++ b/ports/aws-c-event-stream/vcpkg.json
@@ -1,6 +1,6 @@
 {
   "name": "aws-c-event-stream",
-  "version": "0.5.7",
+  "version": "0.5.9",
   "description": "C99 implementation of the vnd.amazon.event-stream content-type.",
   "homepage": "https://github.com/awslabs/aws-c-event-stream",
   "license": "Apache-2.0",
diff --git a/versions/a-/aws-c-event-stream.json b/versions/a-/aws-c-event-stream.json
index 4f40615047..8d60763d91 100644
--- a/versions/a-/aws-c-event-stream.json
+++ b/versions/a-/aws-c-event-stream.json
@@ -1,5 +1,10 @@
 {
   "versions": [
+    {
+      "git-tree": "d8a1a811cc54a280308cc030df340e7bf616e689",
+      "version": "0.5.9",
+      "port-version": 0
+    },
     {
       "git-tree": "93f9bfc5f6c53c2e27d80ad0e5ceff24f57450a9",
       "version": "0.5.7",
diff --git a/versions/baseline.json b/versions/baseline.json
index b5f62bd027..cc2fb19d29 100644
--- a/versions/baseline.json
+++ b/versions/baseline.json
@@ -457,7 +457,7 @@
       "port-version": 0
     },
     "aws-c-event-stream": {
-      "baseline": "0.5.7",
+      "baseline": "0.5.9",
       "port-version": 0
     },
     "aws-c-http": {