diff --git a/package-lock.json b/package-lock.json
index 259ce72..d730f96 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,16 +1,17 @@
 {
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-  "version": "1.1.0-rc4",
+  "version": "1.1.0-rc5",
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   "requires": true,
   "packages": {
     "": {
       "name": "@photogabble/eleventy-plugin-interlinker",
-      "version": "1.1.0-rc4",
+      "version": "1.1.0-rc5",
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         "entities": "^4.5.0",
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         "markdown-it": "^14.1.0"
       },
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@@ -659,6 +660,17 @@
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+      },
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       "dev": true
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+      "resolved": "https://registry.npmjs.org/combined-stream/-/combined-stream-1.0.8.tgz",
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@@ -1481,6 +1509,17 @@
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+      "resolved": "https://registry.npmjs.org/cssstyle/-/cssstyle-4.1.0.tgz",
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+      },
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@@ -1493,6 +1532,18 @@
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+        "whatwg-url": "^14.0.0"
+      },
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-      "dev": true,
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@@ -1522,6 +1572,11 @@
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+    "node_modules/decimal.js": {
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+      "resolved": "https://registry.npmjs.org/decimal.js/-/decimal.js-10.4.3.tgz",
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+    },
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@@ -1556,6 +1611,14 @@
         "url": "https://github.com/sponsors/ljharb"
       }
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+    "node_modules/delayed-stream": {
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+      "resolved": "https://registry.npmjs.org/delayed-stream/-/delayed-stream-1.0.0.tgz",
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+      "engines": {
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@@ -1994,6 +2057,19 @@
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+      "resolved": "https://registry.npmjs.org/form-data/-/form-data-4.0.1.tgz",
+      "integrity": "sha512-tzN8e4TX8+kkxGPK8D5u0FNmjPUjw3lwC9lSLxxoB/+GtsJG91CO8bSWy73APlgAZzZbXEYZJuxjkHH2w+Ezhw==",
+      "dependencies": {
+        "asynckit": "^0.4.0",
+        "combined-stream": "^1.0.8",
+        "mime-types": "^2.1.12"
+      },
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       "resolved": "https://registry.npmjs.org/fresh/-/fresh-0.5.2.tgz",
@@ -2286,6 +2362,17 @@
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+    "node_modules/html-encoding-sniffer": {
+      "version": "4.0.0",
+      "resolved": "https://registry.npmjs.org/html-encoding-sniffer/-/html-encoding-sniffer-4.0.0.tgz",
+      "integrity": "sha512-Y22oTqIU4uuPgEemfz7NDJz6OeKf12Lsu+QC+s3BVpda64lTiMYCyGwg5ki4vFxkMwQdeZDl2adZoqUgdFuTgQ==",
+      "dependencies": {
+        "whatwg-encoding": "^3.1.1"
+      },
+      "engines": {
+        "node": ">=18"
+      }
+    },
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@@ -2348,6 +2435,41 @@
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+    "node_modules/http-proxy-agent": {
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+      "resolved": "https://registry.npmjs.org/http-proxy-agent/-/http-proxy-agent-7.0.2.tgz",
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+        "debug": "^4.3.4"
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+      "resolved": "https://registry.npmjs.org/https-proxy-agent/-/https-proxy-agent-7.0.5.tgz",
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+      "dependencies": {
+        "agent-base": "^7.0.2",
+        "debug": "4"
+      },
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+    "node_modules/iconv-lite": {
+      "version": "0.6.3",
+      "resolved": "https://registry.npmjs.org/iconv-lite/-/iconv-lite-0.6.3.tgz",
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@@ -2531,6 +2653,11 @@
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+      "resolved": "https://registry.npmjs.org/is-potential-custom-element-name/-/is-potential-custom-element-name-1.0.1.tgz",
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@@ -2636,6 +2763,45 @@
         "js-yaml": "bin/js-yaml.js"
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+    "node_modules/jsdom": {
+      "version": "25.0.1",
+      "resolved": "https://registry.npmjs.org/jsdom/-/jsdom-25.0.1.tgz",
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+        "cssstyle": "^4.1.0",
+        "data-urls": "^5.0.0",
+        "decimal.js": "^10.4.3",
+        "form-data": "^4.0.0",
+        "html-encoding-sniffer": "^4.0.0",
+        "http-proxy-agent": "^7.0.2",
+        "https-proxy-agent": "^7.0.5",
+        "is-potential-custom-element-name": "^1.0.1",
+        "nwsapi": "^2.2.12",
+        "parse5": "^7.1.2",
+        "rrweb-cssom": "^0.7.1",
+        "saxes": "^6.0.0",
+        "symbol-tree": "^3.2.4",
+        "tough-cookie": "^5.0.0",
+        "w3c-xmlserializer": "^5.0.0",
+        "webidl-conversions": "^7.0.0",
+        "whatwg-encoding": "^3.1.1",
+        "whatwg-mimetype": "^4.0.0",
+        "whatwg-url": "^14.0.0",
+        "ws": "^8.18.0",
+        "xml-name-validator": "^5.0.0"
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+      "peerDependencies": {
+        "canvas": "^2.11.2"
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@@ -2906,6 +3072,25 @@
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-      "dev": true
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@@ -3057,6 +3241,11 @@
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+      "resolved": "https://registry.npmjs.org/parse5/-/parse5-7.2.1.tgz",
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+    "node_modules/punycode": {
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@@ -3634,6 +3842,11 @@
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@@ -3657,6 +3870,22 @@
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@@ -4066,6 +4295,11 @@
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@@ -4119,6 +4353,22 @@
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@@ -4140,6 +4390,28 @@
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+      "version": "5.0.0",
+      "resolved": "https://registry.npmjs.org/tr46/-/tr46-5.0.0.tgz",
+      "integrity": "sha512-tk2G5R2KRwBd+ZN0zaEXpmzdKyOYksXwywulIX95MBODjSzMIuQnQ3m8JxgbhnL1LeVo7lqQKsYa1O3Htl7K5g==",
+      "dependencies": {
+        "punycode": "^2.3.1"
+      },
+      "engines": {
+        "node": ">=18"
+      }
+    },
     "node_modules/type-detect": {
       "version": "4.0.8",
       "resolved": "https://registry.npmjs.org/type-detect/-/type-detect-4.0.8.tgz",
@@ -4195,6 +4467,25 @@
         "node": ">=10.12.0"
       }
     },
+    "node_modules/w3c-xmlserializer": {
+      "version": "5.0.0",
+      "resolved": "https://registry.npmjs.org/w3c-xmlserializer/-/w3c-xmlserializer-5.0.0.tgz",
+      "integrity": "sha512-o8qghlI8NZHU1lLPrpi2+Uq7abh4GGPpYANlalzWxyWteJOCsr/P+oPBA49TOLu5FTZO4d3F9MnWJfiMo4BkmA==",
+      "dependencies": {
+        "xml-name-validator": "^5.0.0"
+      },
+      "engines": {
+        "node": ">=18"
+      }
+    },
+    "node_modules/webidl-conversions": {
+      "version": "7.0.0",
+      "resolved": "https://registry.npmjs.org/webidl-conversions/-/webidl-conversions-7.0.0.tgz",
+      "integrity": "sha512-VwddBukDzu71offAQR975unBIGqfKZpM+8ZX6ySk8nYhVoo5CYaZyzt3YBvYtRtO+aoGlqxPg/B87NGVZ/fu6g==",
+      "engines": {
+        "node": ">=12"
+      }
+    },
     "node_modules/well-known-symbols": {
       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/well-known-symbols/-/well-known-symbols-2.0.0.tgz",
@@ -4204,6 +4495,37 @@
         "node": ">=6"
       }
     },
+    "node_modules/whatwg-encoding": {
+      "version": "3.1.1",
+      "resolved": "https://registry.npmjs.org/whatwg-encoding/-/whatwg-encoding-3.1.1.tgz",
+      "integrity": "sha512-6qN4hJdMwfYBtE3YBTTHhoeuUrDBPZmbQaxWAqSALV/MeEnR5z1xd8UKud2RAkFoPkmB+hli1TZSnyi84xz1vQ==",
+      "dependencies": {
+        "iconv-lite": "0.6.3"
+      },
+      "engines": {
+        "node": ">=18"
+      }
+    },
+    "node_modules/whatwg-mimetype": {
+      "version": "4.0.0",
+      "resolved": "https://registry.npmjs.org/whatwg-mimetype/-/whatwg-mimetype-4.0.0.tgz",
+      "integrity": "sha512-QaKxh0eNIi2mE9p2vEdzfagOKHCcj1pJ56EEHGQOVxp8r9/iszLUUV7v89x9O1p/T+NlTM5W7jW6+cz4Fq1YVg==",
+      "engines": {
+        "node": ">=18"
+      }
+    },
+    "node_modules/whatwg-url": {
+      "version": "14.0.0",
+      "resolved": "https://registry.npmjs.org/whatwg-url/-/whatwg-url-14.0.0.tgz",
+      "integrity": "sha512-1lfMEm2IEr7RIV+f4lUNPOqfFL+pO+Xw3fJSqmjX9AbXcXcYOkCe1P6+9VBZB6n94af16NfZf+sSk0JCBZC9aw==",
+      "dependencies": {
+        "tr46": "^5.0.0",
+        "webidl-conversions": "^7.0.0"
+      },
+      "engines": {
+        "node": ">=18"
+      }
+    },
     "node_modules/which": {
       "version": "2.0.2",
       "resolved": "https://registry.npmjs.org/which/-/which-2.0.2.tgz",
@@ -4354,7 +4676,6 @@
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       "resolved": "https://registry.npmjs.org/ws/-/ws-8.18.0.tgz",
       "integrity": "sha512-8VbfWfHLbbwu3+N6OKsOMpBdT4kXPDDB9cJk2bJ6mh9ucxdlnNvH1e+roYkKmN9Nxw2yjz7VzeO9oOz2zJ04Pw==",
-      "dev": true,
       "engines": {
         "node": ">=10.0.0"
       },
@@ -4371,6 +4692,19 @@
         }
       }
     },
+    "node_modules/xml-name-validator": {
+      "version": "5.0.0",
+      "resolved": "https://registry.npmjs.org/xml-name-validator/-/xml-name-validator-5.0.0.tgz",
+      "integrity": "sha512-EvGK8EJ3DhaHfbRlETOWAS5pO9MZITeauHKJyb8wyajUfQUenkIg2MvLDTZ4T/TgIcm3HU0TFBgWWboAZ30UHg==",
+      "engines": {
+        "node": ">=18"
+      }
+    },
+    "node_modules/xmlchars": {
+      "version": "2.2.0",
+      "resolved": "https://registry.npmjs.org/xmlchars/-/xmlchars-2.2.0.tgz",
+      "integrity": "sha512-JZnDKK8B0RCDw84FNdDAIpZK+JuJw+s7Lz8nksI7SIuU3UXJJslUthsi+uWBUYOwPFwW7W7PRLRfUKpxjtjFCw=="
+    },
     "node_modules/y18n": {
       "version": "5.0.8",
       "resolved": "https://registry.npmjs.org/y18n/-/y18n-5.0.8.tgz",
diff --git a/package.json b/package.json
index 6d5f619..fdf5b67 100644
--- a/package.json
+++ b/package.json
@@ -53,6 +53,7 @@
   "dependencies": {
     "chalk": "^4.1.1",
     "entities": "^4.5.0",
+    "jsdom": "^25.0.1",
     "markdown-it": "^14.1.0"
   },
   "devDependencies": {