diff --git a/compat/js-yaml-safe-api/index.js b/compat/js-yaml-safe-api/index.js
new file mode 100644
index 0000000..9d8c9f7
--- /dev/null
+++ b/compat/js-yaml-safe-api/index.js
@@ -0,0 +1,17 @@
+"use strict";
+
+const yaml = require("js-yaml-upstream");
+
+function safeLoad(input, options) {
+  if (input == null || String(input).trim() === "") {
+    return undefined;
+  }
+  return yaml.load(input, options);
+}
+
+module.exports = Object.assign({}, yaml, {
+  load: yaml.load,
+  dump: yaml.dump,
+  safeLoad,
+  safeDump: yaml.dump,
+});
diff --git a/compat/js-yaml-safe-api/package.json b/compat/js-yaml-safe-api/package.json
new file mode 100644
index 0000000..7194324
--- /dev/null
+++ b/compat/js-yaml-safe-api/package.json
@@ -0,0 +1,10 @@
+{
+  "name": "js-yaml",
+  "version": "5.4.2",
+  "private": true,
+  "description": "js-yaml 5 with safeLoad/safeDump aliases for gray-matter 4.x and a CJS default export for Eleventy.",
+  "main": "index.js",
+  "dependencies": {
+    "js-yaml-upstream": "npm:js-yaml@5.4.2"
+  }
+}
diff --git a/package-lock.json b/package-lock.json
index ba39814..c1d4c5c 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -9,7 +9,15 @@
       "version": "1.0.0",
       "license": "UNLICENSED",
       "dependencies": {
-        "@11ty/eleventy": "3.1.6"
+        "@11ty/eleventy": "3.1.6",
+        "js-yaml": "file:compat/js-yaml-safe-api"
+      }
+    },
+    "compat/js-yaml-safe-api": {
+      "name": "js-yaml",
+      "version": "5.4.2",
+      "dependencies": {
+        "js-yaml-upstream": "npm:js-yaml@5.4.2"
       }
     },
     "node_modules/@11ty/dependency-tree": {
@@ -145,6 +153,28 @@
         "url": "https://opencollective.com/11ty"
       }
     },
+    "node_modules/@11ty/eleventy/node_modules/js-yaml": {
+      "version": "4.3.2",
+      "resolved": "https://registry.npmjs.org/js-yaml/-/js-yaml-4.3.2.tgz",
+      "integrity": "sha512-SFNOvSJ+Dgf/9An904Yx+CgSlIPCkIpao4qo51lpee25TIRejdH3rhR4EZMGoNx3/TP3O+wzWuiTFl4sqbltzA==",
+      "funding": [
+        {
+          "type": "github",
+          "url": "https://github.com/sponsors/puzrin"
+        },
+        {
+          "type": "github",
+          "url": "https://github.com/sponsors/nodeca"
+        }
+      ],
+      "license": "MIT",
+      "dependencies": {
+        "argparse": "^2.0.1"
+      },
+      "bin": {
+        "js-yaml": "bin/js-yaml.js"
+      }
+    },
     "node_modules/@11ty/lodash-custom": {
       "version": "4.17.21",
       "resolved": "https://registry.npmjs.org/@11ty/lodash-custom/-/lodash-custom-4.17.21.tgz",
@@ -720,27 +750,10 @@
         "node": ">=6.0"
       }
     },
+    "node_modules/gray-matter/compat/js-yaml-safe-api": {},
     "node_modules/gray-matter/node_modules/js-yaml": {
-      "version": "5.4.2",
-      "resolved": "https://registry.npmjs.org/js-yaml/-/js-yaml-5.4.2.tgz",
-      "integrity": "sha512-m+aqu+LwO1O6sIopafj8HUVl5aawITwZQe/yHpMCKjaWBaA/d07B/QdMb3529REftiU+RMMHL3Vlsw3hON7vWg==",
-      "funding": [
-        {
-          "type": "github",
-          "url": "https://github.com/sponsors/puzrin"
-        },
-        {
-          "type": "github",
-          "url": "https://github.com/sponsors/nodeca"
-        }
-      ],
-      "license": "MIT",
-      "dependencies": {
-        "argparse": "^2.0.1"
-      },
-      "bin": {
-        "js-yaml": "bin/js-yaml.mjs"
-      }
+      "resolved": "node_modules/gray-matter/compat/js-yaml-safe-api",
+      "link": true
     },
     "node_modules/htmlparser2": {
       "version": "7.2.0",
@@ -909,9 +922,14 @@
       }
     },
     "node_modules/js-yaml": {
-      "version": "4.3.2",
-      "resolved": "https://registry.npmjs.org/js-yaml/-/js-yaml-4.3.2.tgz",
-      "integrity": "sha512-SFNOvSJ+Dgf/9An904Yx+CgSlIPCkIpao4qo51lpee25TIRejdH3rhR4EZMGoNx3/TP3O+wzWuiTFl4sqbltzA==",
+      "resolved": "compat/js-yaml-safe-api",
+      "link": true
+    },
+    "node_modules/js-yaml-upstream": {
+      "name": "js-yaml",
+      "version": "5.4.2",
+      "resolved": "https://registry.npmjs.org/js-yaml/-/js-yaml-5.4.2.tgz",
+      "integrity": "sha512-m+aqu+LwO1O6sIopafj8HUVl5aawITwZQe/yHpMCKjaWBaA/d07B/QdMb3529REftiU+RMMHL3Vlsw3hON7vWg==",
       "funding": [
         {
           "type": "github",
@@ -927,7 +945,7 @@
         "argparse": "^2.0.1"
       },
       "bin": {
-        "js-yaml": "bin/js-yaml.js"
+        "js-yaml": "bin/js-yaml.mjs"
       }
     },
     "node_modules/junk": {
diff --git a/package.json b/package.json
index 5faf444..fd87118 100644
--- a/package.json
+++ b/package.json
@@ -10,11 +10,12 @@
   },
   "license": "UNLICENSED",
   "dependencies": {
-    "@11ty/eleventy": "3.1.6"
+    "@11ty/eleventy": "3.1.6",
+    "js-yaml": "file:compat/js-yaml-safe-api"
   },
   "overrides": {
     "gray-matter": {
-      "js-yaml": "^5.4.2"
+      "js-yaml": "$js-yaml"
     }
   }
 }