diff --git a/css/at-rules/page.json b/css/at-rules/page.json
index 736eeea4bcf335..5cded7962908b3 100644
--- a/css/at-rules/page.json
+++ b/css/at-rules/page.json
@@ -578,6 +578,84 @@
                 "deprecated": false
               }
             }
+          },
+          "landscape": {
+            "__compat": {
+              "description": "`landscape` page orientation",
+              "spec_url": "https://drafts.csswg.org/css-page/#page-size-prop",
+              "tags": [
+                "web-features:page-setup"
+              ],
+              "support": {
+                "chrome": {
+                  "version_added": "15"
+                },
+                "chrome_android": "mirror",
+                "edge": "mirror",
+                "firefox": {
+                  "version_added": "95"
+                },
+                "firefox_android": "mirror",
+                "oculus": "mirror",
+                "opera": "mirror",
+                "opera_android": "mirror",
+                "safari": {
+                  "version_added": false
+                },
+                "safari_ios": "mirror",
+                "samsunginternet_android": {
+                  "version_added": "1.5"
+                },
+                "webview_android": {
+                  "version_added": "37"
+                },
+                "webview_ios": "mirror"
+              },
+              "status": {
+                "experimental": false,
+                "standard_track": true,
+                "deprecated": false
+              }
+            }
+          },
+          "portrait": {
+            "__compat": {
+              "description": "`portrait` page orientation",
+              "spec_url": "https://drafts.csswg.org/css-page/#page-size-prop",
+              "tags": [
+                "web-features:page-setup"
+              ],
+              "support": {
+                "chrome": {
+                  "version_added": "15"
+                },
+                "chrome_android": "mirror",
+                "edge": "mirror",
+                "firefox": {
+                  "version_added": "95"
+                },
+                "firefox_android": "mirror",
+                "oculus": "mirror",
+                "opera": "mirror",
+                "opera_android": "mirror",
+                "safari": {
+                  "version_added": false
+                },
+                "safari_ios": "mirror",
+                "samsunginternet_android": {
+                  "version_added": "1.5"
+                },
+                "webview_android": {
+                  "version_added": "37"
+                },
+                "webview_ios": "mirror"
+              },
+              "status": {
+                "experimental": false,
+                "standard_track": true,
+                "deprecated": false
+              }
+            }
           }
         },
         "top-center": {