diff --git a/package-lock.json b/package-lock.json
index 897bc79..1f2b4e8 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -23,6 +23,7 @@
         "esbuild": "^0.11.20",
         "fs-extra": "^8.1.0",
         "jsdom": "^16.4.0",
+        "just-has": "^2.1.0",
         "lazysizes": "^5.3.0-beta1",
         "markdown-it": "^11.0.1",
         "marked": "^1.2.7",
@@ -17064,6 +17065,11 @@
         "node": ">=0.10.0"
       }
     },
+    "node_modules/just-has": {
+      "version": "2.1.0",
+      "resolved": "https://registry.npmjs.org/just-has/-/just-has-2.1.0.tgz",
+      "integrity": "sha512-wBmdTpM82xQCUe4guAIu8xP2crI4jye18OB066ZCvvS9HtspOdK0zmyuZKPwHiM8zS6dSlPkERzjwj4Zl5q7Qg=="
+    },
     "node_modules/keygrip": {
       "version": "1.1.0",
       "resolved": "https://registry.npmjs.org/keygrip/-/keygrip-1.1.0.tgz",
@@ -46647,6 +46653,11 @@
       "integrity": "sha1-h75jSIZJy9ym9Tqzm+yczSNH9ZI=",
       "dev": true
     },
+    "just-has": {
+      "version": "2.1.0",
+      "resolved": "https://registry.npmjs.org/just-has/-/just-has-2.1.0.tgz",
+      "integrity": "sha512-wBmdTpM82xQCUe4guAIu8xP2crI4jye18OB066ZCvvS9HtspOdK0zmyuZKPwHiM8zS6dSlPkERzjwj4Zl5q7Qg=="
+    },
     "keygrip": {
       "version": "1.1.0",
       "resolved": "https://registry.npmjs.org/keygrip/-/keygrip-1.1.0.tgz",
diff --git a/package.json b/package.json
index d88a610..8faf32b 100644
--- a/package.json
+++ b/package.json
@@ -53,6 +53,7 @@
     "esbuild": "^0.11.20",
     "fs-extra": "^8.1.0",
     "jsdom": "^16.4.0",
+    "just-has": "^2.1.0",
     "lazysizes": "^5.3.0-beta1",
     "markdown-it": "^11.0.1",
     "marked": "^1.2.7",