diff --git a/package.json b/package.json
index 9768df67e65..a80720966fe 100644
--- a/package.json
+++ b/package.json
@@ -5,6 +5,6 @@
   "author": "Government Digital Service",
   "license": "MIT",
   "dependencies": {
-    "mermaid": "^11.17.2"
+    "mermaid": "^12.1.0"
   }
 }
diff --git a/yarn.lock b/yarn.lock
index b02b930ff34..e5c2c17b5b5 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -15,10 +15,35 @@
   resolved "https://registry.yarnpkg.com/@braintree/sanitize-url/-/sanitize-url-7.1.2.tgz#ca2035b0fefe956a8676ff0c69af73e605fcd81f"
   integrity sha512-jigsZK+sMF/cuiB7sERuo9V7N9jx+dhmHHnQyDSVdpZwVutaBu7WvNYqMDLSgFgfB30n452TP3vjDAvFC973mA==
 
-"@chevrotain/types@~11.1.2":
-  version "11.1.2"
-  resolved "https://registry.yarnpkg.com/@chevrotain/types/-/types-11.1.2.tgz#e83a1a2704f0c5e49e7592b214031a0f4a34d7e5"
-  integrity sha512-U+HFai5+zmJCkK86QsaJtoITlboZHBqrVketcO2ROv865xfCMSFpELQoz1GkX5GzME8pTa+3kbKrZHQtI0gdbw==
+"@chevrotain/cst-dts-gen@13.2.0":
+  version "13.2.0"
+  resolved "https://registry.yarnpkg.com/@chevrotain/cst-dts-gen/-/cst-dts-gen-13.2.0.tgz#64d904738c224327b14ed616d174cb2c097c8eea"
+  integrity sha512-bA9dvWlhAUcHkNwU+8w9yiUxJPlj/Lm3VqS7MD+NbIR/7LmpNLuK/AWNFdCo/T3SK5ND0/UHf3IJvl/Jn/i6yg==
+  dependencies:
+    "@chevrotain/gast" "13.2.0"
+    "@chevrotain/types" "13.2.0"
+
+"@chevrotain/gast@13.2.0":
+  version "13.2.0"
+  resolved "https://registry.yarnpkg.com/@chevrotain/gast/-/gast-13.2.0.tgz#3fd21451c3a6d1550e8ef61aca656359fd468644"
+  integrity sha512-bCARdAsG+eEbOveSXcOAC7pVxA04I1ionzeMOwIYf5NX7SaS7zgn4Dgug2BSqoL+iyKeMNSorQjsFSHJHsCNwg==
+  dependencies:
+    "@chevrotain/types" "13.2.0"
+
+"@chevrotain/regexp-to-ast@13.2.0":
+  version "13.2.0"
+  resolved "https://registry.yarnpkg.com/@chevrotain/regexp-to-ast/-/regexp-to-ast-13.2.0.tgz#fc254a6af6461f7cce6a0f5b8ecbd3dd2dadf3ea"
+  integrity sha512-kxpUkLtiaK09ph+dib+Yvm+3sWSnuwlo25gqfKRgTPNmF6H7uW4gVkMjaRdtnN783S9sM6vUNWh9CsxYX4QwKw==
+
+"@chevrotain/types@13.2.0", "@chevrotain/types@~13.2.0":
+  version "13.2.0"
+  resolved "https://registry.yarnpkg.com/@chevrotain/types/-/types-13.2.0.tgz#546500791f9713e8c7bcd1a090fdc232374cf832"
+  integrity sha512-7qrYHRlKfWf2AvBfJi5eVOrKAkbxvMFsy/iIHTGIiApNcEecCaVIdR+mIQhyCBsTDJxBz4JWXHMo6krbhR9hVg==
+
+"@chevrotain/utils@13.2.0":
+  version "13.2.0"
+  resolved "https://registry.yarnpkg.com/@chevrotain/utils/-/utils-13.2.0.tgz#87111f7fa043331083adb0e65ec4d8e66ff98688"
+  integrity sha512-SzKYY68rseOrb9KILVzPsl6SjkQtdWw01SRGB5aCVI5kFcHltQsOYV3JB0Ffst72DgkvHCyDQ0NLwxtmCCf97Q==
 
 "@iconify/types@^2.0.0":
   version "2.0.0"
@@ -34,12 +59,12 @@
     "@iconify/types" "^2.0.0"
     mlly "^1.8.0"
 
-"@mermaid-js/parser@^1.2.1":
-  version "1.2.1"
-  resolved "https://registry.yarnpkg.com/@mermaid-js/parser/-/parser-1.2.1.tgz#94cc40416137bb10d2bc1b0a49c623d716e76233"
-  integrity sha512-n12NohV3mrUyUL2o93IgG/ifeW9FTyeJn3zDxkhwa8MJ9Fxg3HQMlA3RiGmD/3UnJvheztkjjQAjA2T4LmUcpw==
+"@mermaid-js/parser@^2.0.1":
+  version "2.0.1"
+  resolved "https://registry.yarnpkg.com/@mermaid-js/parser/-/parser-2.0.1.tgz#ac69b59ead67a3b16a8e6d7ec5159e3cd66ee7c5"
+  integrity sha512-j37dj/h6p6pots1L7pLPPNuABEEu9WP4OYg9pW1g+nYG331j0+3canE9OagtYdytYvdSAMG+2fKU5cxep6LgjA==
   dependencies:
-    "@chevrotain/types" "~11.1.2"
+    "@chevrotain/types" "~13.2.0"
 
 "@types/d3-array@*":
   version "3.2.1"
@@ -279,6 +304,17 @@ acorn@^8.16.0:
   resolved "https://registry.yarnpkg.com/acorn/-/acorn-8.16.0.tgz#4ce79c89be40afe7afe8f3adb902a1f1ce9ac08a"
   integrity sha512-UVJyE9MttOsBQIDKw1skb9nAwQuR5wuGD3+82K6JgJlm/Y+KI92oNsMNGZCYdDsVtRHSak0pcV5Dno5+4jh9sw==
 
+chevrotain@~13.2.0:
+  version "13.2.0"
+  resolved "https://registry.yarnpkg.com/chevrotain/-/chevrotain-13.2.0.tgz#eb4426dcd8befff3d4c2880f8a54367498803ba4"
+  integrity sha512-GTouk5YzgBxlTPCaDn5q0q2EJKkrYmnPF+HmF8v0Qo4r3iyPG7HJivkN1wthCXZcm3sIcZFpGTRovLPNdJNRCA==
+  dependencies:
+    "@chevrotain/cst-dts-gen" "13.2.0"
+    "@chevrotain/gast" "13.2.0"
+    "@chevrotain/regexp-to-ast" "13.2.0"
+    "@chevrotain/types" "13.2.0"
+    "@chevrotain/utils" "13.2.0"
+
 commander@7:
   version "7.2.0"
   resolved "https://registry.yarnpkg.com/commander/-/commander-7.2.0.tgz#a36cb57d0b501ce108e4d20559a150a391d97ab7"
@@ -618,25 +654,23 @@ delaunator@5:
   dependencies:
     robust-predicates "^3.0.2"
 
-dompurify@^3.3.3:
-  version "3.4.13"
-  resolved "https://registry.yarnpkg.com/dompurify/-/dompurify-3.4.13.tgz#fc28949d59f92d62e28a3a764bcbeee35897a1be"
-  integrity sha512-2vmYIoqjze2d+kakP8S/nS5shfsl587kzwEjcGlTdiksUVgFHnFCsLYDVj/JNqJVOQZGSYBTmuycv0PodwmnMQ==
+dompurify@^3.4.12:
+  version "3.4.16"
+  resolved "https://registry.yarnpkg.com/dompurify/-/dompurify-3.4.16.tgz#c51b3709ea15ee9abb07e804f2ef30ea9b953128"
+  integrity sha512-sqo+pNp3qRhCIpbgRi1y8Tgk27Bo2Ry7w0dC1NBeNTdZChWjz9Xb/KOoZbRP/R6pQZ80Qw8YhXw13hWWBbMRnQ==
   optionalDependencies:
     "@types/trusted-types" "^2.0.7"
 
+elkjs@^0.9.3:
+  version "0.9.3"
+  resolved "https://registry.yarnpkg.com/elkjs/-/elkjs-0.9.3.tgz#16711f8ceb09f1b12b99e971b138a8384a529161"
+  integrity sha512-f/ZeWvW/BCXbhGEf1Ujp29EASo/lk1FDnETgNKwJrsVvGZhUWCZyg3xLJjAsxfOmt8KjswHmI5EwCQcPMpOYhQ==
+
 es-toolkit@^1.45.1:
   version "1.46.1"
   resolved "https://registry.yarnpkg.com/es-toolkit/-/es-toolkit-1.46.1.tgz#38ca27191a98a867fc544b81cf1477a68947fb06"
   integrity sha512-5eNtXOs3tbfxXOj04tjjseeWkRWaoCjdEI+96DgwzZoe6c9juL49pXlzAFTI72aWC9Y8p7168g6XIKjh7k6pyQ==
 
-fastdom@1.0.12:
-  version "1.0.12"
-  resolved "https://registry.yarnpkg.com/fastdom/-/fastdom-1.0.12.tgz#ae43d55af017252ae499b2e186511ab97412de39"
-  integrity sha512-LB+xjSTEbjHE1cWsxu+tN2Xqr1kpi+V9aADI7sVM5ZMaXyYGPHULQMzpJMYqOTULK/73pUkWVzzObFRBkPr+hg==
-  dependencies:
-    strictdom "^1.0.1"
-
 hachure-fill@^0.5.2:
   version "0.5.2"
   resolved "https://registry.yarnpkg.com/hachure-fill/-/hachure-fill-0.5.2.tgz#d19bc4cc8750a5962b47fb1300557a85fcf934cc"
@@ -691,16 +725,17 @@ marked@^16.3.0:
   resolved "https://registry.yarnpkg.com/marked/-/marked-16.4.2.tgz#4959a64be6c486f0db7467ead7ce288de54290a3"
   integrity sha512-TI3V8YYWvkVf3KJe1dRkpnjs68JUPyEa5vjKrp1XEEJUAOaQc+Qj+L1qWbPd0SJuAdQkFU0h73sXXqwDYxsiDA==
 
-mermaid@^11.17.2:
-  version "11.17.2"
-  resolved "https://registry.yarnpkg.com/mermaid/-/mermaid-11.17.2.tgz#e3caf3717582c0e44e5d04cff043e025caec7cba"
-  integrity sha512-V6K3C8EBdEsPFZXSKMJe6ppQOENxuHARr9GvHX4hh47lAbhMRD9qf4oEK7LoaRQxULMa80/qt5gHO73aCleBBg==
+mermaid@^12.1.0:
+  version "12.1.0"
+  resolved "https://registry.yarnpkg.com/mermaid/-/mermaid-12.1.0.tgz#b9f893f32dc2f86bf7b31d3399e2e2d381e0464b"
+  integrity sha512-wlVCp+8eTupfCeeFvoZNNiTuHrvag0P2jz/ILgb/f/6jkVokUefOcujefi8qUe/j2asHiSePncVsz/xzzA80LQ==
   dependencies:
     "@braintree/sanitize-url" "^7.1.2"
     "@iconify/utils" "^3.0.2"
-    "@mermaid-js/parser" "^1.2.1"
+    "@mermaid-js/parser" "^2.0.1"
     "@types/d3" "^7.4.3"
     "@upsetjs/venn.js" "^2.0.0"
+    chevrotain "~13.2.0"
     cytoscape "^3.34.0"
     cytoscape-cose-bilkent "^4.1.0"
     cytoscape-fcose "^2.2.0"
@@ -708,9 +743,9 @@ mermaid@^11.17.2:
     d3-sankey "^0.12.3"
     dagre-d3-es "7.0.14"
     dayjs "^1.11.21"
-    dompurify "^3.3.3"
+    dompurify "^3.4.12"
+    elkjs "^0.9.3"
     es-toolkit "^1.45.1"
-    fastdom "1.0.12"
     katex "^0.16.47"
     khroma "^2.1.0"
     marked "^16.3.0"
@@ -801,11 +836,6 @@ rw@1:
   resolved "https://registry.yarnpkg.com/safer-buffer/-/safer-buffer-2.1.2.tgz#44fa161b0187b9549dd84bb91802f9bd8385cd6a"
   integrity sha512-YZo3K82SD7Riyi0E1EQPojLz7kpepnSQI9IyPbHHg1XXXevb5dJI7tpyN2ADxGcQbHG7vcyRHk0cbwqcQriUtg==
 
-strictdom@^1.0.1:
-  version "1.0.1"
-  resolved "https://registry.yarnpkg.com/strictdom/-/strictdom-1.0.1.tgz#189de91649f73d44d59b8432efa68ef9d2659460"
-  integrity sha512-cEmp9QeXXRmjj/rVp9oyiqcvyocWab/HaoN4+bwFeZ7QzykJD6L3yD4v12K1x0tHpqRqVpJevN3gW7kyM39Bqg==
-
 stylis@^4.3.6:
   version "4.3.6"
   resolved "https://registry.yarnpkg.com/stylis/-/stylis-4.3.6.tgz#7c7b97191cb4f195f03ecab7d52f7902ed378320"