diff --git a/ports/ms-gsl/portfile.cmake b/ports/ms-gsl/portfile.cmake
index 2296e4e50f..23d78f2f5e 100644
--- a/ports/ms-gsl/portfile.cmake
+++ b/ports/ms-gsl/portfile.cmake
@@ -3,7 +3,7 @@ vcpkg_from_github(
     OUT_SOURCE_PATH SOURCE_PATH
     REPO Microsoft/GSL
     REF v${VERSION}
-    SHA512 1db14bebab5f2bc0752214f9bf1b84a056b7d83b4a9d296663c43103387baee60373447f62c4e9bc0b8df06a7ce0571a4e2b4a31441c866894eee3ae258fdfc8
+    SHA512 f325c70fb02ead99c5be333baa0793573dd091fe111b20ff13b2d524b71f1357bbc365a66684a8c791796095284cc6a968fc3c7284a0b3c0646a38a61e46792c
     HEAD_REF main
 )
 
diff --git a/ports/ms-gsl/vcpkg.json b/ports/ms-gsl/vcpkg.json
index a6e4571c56..49557bd37b 100644
--- a/ports/ms-gsl/vcpkg.json
+++ b/ports/ms-gsl/vcpkg.json
@@ -1,6 +1,6 @@
 {
   "name": "ms-gsl",
-  "version": "4.1.0",
+  "version": "4.2.0",
   "description": "Microsoft implementation of the Guidelines Support Library",
   "homepage": "https://github.com/Microsoft/GSL",
   "license": "MIT",
diff --git a/versions/baseline.json b/versions/baseline.json
index 7f4ec8a351..779c6f0e98 100644
--- a/versions/baseline.json
+++ b/versions/baseline.json
@@ -6181,7 +6181,7 @@
       "port-version": 2
     },
     "ms-gsl": {
-      "baseline": "4.1.0",
+      "baseline": "4.2.0",
       "port-version": 0
     },
     "ms-ifc-sdk": {
diff --git a/versions/m-/ms-gsl.json b/versions/m-/ms-gsl.json
index 5aed868137..27b6b039e8 100644
--- a/versions/m-/ms-gsl.json
+++ b/versions/m-/ms-gsl.json
@@ -1,5 +1,10 @@
 {
   "versions": [
+    {
+      "git-tree": "89dc0d1fedfee5424e09ce46e2b2c154ae392722",
+      "version": "4.2.0",
+      "port-version": 0
+    },
     {
       "git-tree": "d71696a526519c3f680b1b77e87d39f8eb94e650",
       "version": "4.1.0",