diff --git a/packages/techdocs-common/package.json b/packages/techdocs-common/package.json
index 7fc88a5238..cef5920c35 100644
--- a/packages/techdocs-common/package.json
+++ b/packages/techdocs-common/package.json
@@ -48,7 +48,7 @@
     "express": "^4.17.1",
     "fs-extra": "^9.0.1",
     "git-url-parse": "^11.4.3",
-    "js-yaml": "^3.14.0",
+    "js-yaml": "^4.0.0",
     "mime-types": "^2.1.27",
     "mock-fs": "^4.13.0",
     "recursive-readdir": "^2.2.2",
@@ -58,7 +58,7 @@
     "@backstage/cli": "^0.4.4",
     "@types/fs-extra": "^9.0.5",
     "@types/git-url-parse": "^9.0.0",
-    "@types/js-yaml": "^3.12.5",
+    "@types/js-yaml": "^4.0.0",
     "@types/mime-types": "^2.1.0",
     "@types/mock-fs": "^4.13.0",
     "@types/recursive-readdir": "^2.2.0"
diff --git a/packages/techdocs-common/src/stages/generate/helpers.ts b/packages/techdocs-common/src/stages/generate/helpers.ts
index 773b542517..dde61b2359 100644
--- a/packages/techdocs-common/src/stages/generate/helpers.ts
+++ b/packages/techdocs-common/src/stages/generate/helpers.ts
@@ -241,7 +241,7 @@ export const patchMkdocsYmlPreBuild = async (
 
   let mkdocsYml: any;
   try {
-    mkdocsYml = yaml.safeLoad(mkdocsYmlFileString);
+    mkdocsYml = yaml.load(mkdocsYmlFileString);
 
     // mkdocsYml should be an object type after successful parsing.
     // But based on its type definition, it can also be a string or undefined, which we don't want.
diff --git a/yarn.lock b/yarn.lock
index ca7b6f065f..e31e107e09 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1666,10 +1666,10 @@
     yup "^0.29.3"
 
 "@backstage/core@^0.3.0":
-  version "0.4.2"
+  version "0.4.3"
   dependencies:
     "@backstage/config" "^0.1.2"
-    "@backstage/core-api" "^0.2.7"
+    "@backstage/core-api" "^0.2.8"
     "@backstage/theme" "^0.2.2"
     "@material-ui/core" "^4.11.0"
     "@material-ui/icons" "^4.9.1"
@@ -5771,7 +5771,7 @@
   resolved "https://registry.npmjs.org/@types/js-cookie/-/js-cookie-2.2.6.tgz#f1a1cb35aff47bc5cfb05cb0c441ca91e914c26f"
   integrity sha512-+oY0FDTO2GYKEV0YPvSshGq9t7YozVkgvXLty7zogQNuCxBhT9/3INX9Q7H1aRZ4SUDRXAKlJuA4EA5nTt7SNw==
 
-"@types/js-yaml@^3.12.1", "@types/js-yaml@^3.12.5":
+"@types/js-yaml@^3.12.1", "@types/js-yaml@^3.12.5", "@types/js-yaml@^4.0.0":
   version "3.12.5"
   resolved "https://registry.npmjs.org/@types/js-yaml/-/js-yaml-3.12.5.tgz#136d5e6a57a931e1cce6f9d8126aa98a9c92a6bb"
   integrity sha512-JCcp6J0GV66Y4ZMDAQCXot4xprYB+Zfd3meK9+INSJeVZwJmHAW30BBEEkPzXswMXuiyReUGOP3GxrADc9wPww==
@@ -7399,6 +7399,11 @@ argparse@^1.0.10, argparse@^1.0.7:
   dependencies:
     sprintf-js "~1.0.2"
 
+argparse@^2.0.1:
+  version "2.0.1"
+  resolved "https://registry.npmjs.org/argparse/-/argparse-2.0.1.tgz#246f50f3ca78a3240f6c997e8a9bd1eac49e4b38"
+  integrity sha512-8+9WqebbFzpX9OR+Wa6O29asIogeRMzcGtAINdpMHHyAg10f05aSFVBbcEqGf/PXw1EjAZ+q2/bEBg3DvurK3Q==
+
 aria-query@^3.0.0:
   version "3.0.0"
   resolved "https://registry.npmjs.org/aria-query/-/aria-query-3.0.0.tgz#65b3fcc1ca1155a8c9ae64d6eee297f15d5133cc"
@@ -15739,6 +15744,13 @@ js-yaml@^3.13.0, js-yaml@^3.13.1, js-yaml@^3.14.0, js-yaml@^3.6.1, js-yaml@^3.8.
     argparse "^1.0.7"
     esprima "^4.0.0"
 
+js-yaml@^4.0.0:
+  version "4.0.0"
+  resolved "https://registry.npmjs.org/js-yaml/-/js-yaml-4.0.0.tgz#f426bc0ff4b4051926cd588c71113183409a121f"
+  integrity sha512-pqon0s+4ScYUvX30wxQi3PogGFAlUyH0awepWvwkj4jD4v+ova3RiYw8bmA6x2rDrEaj8i/oWKoRxpVNW+Re8Q==
+  dependencies:
+    argparse "^2.0.1"
+
 jsbn@~0.1.0:
   version "0.1.1"
   resolved "https://registry.npmjs.org/jsbn/-/jsbn-0.1.1.tgz#a5e654c2e5a2deb5f201d96cefbca80c0ef2f513"