diff --git a/css/properties.json b/css/properties.json
index 71fd3b7c..91937d3b 100644
--- a/css/properties.json
+++ b/css/properties.json
@@ -9425,6 +9425,21 @@
     "status": "standard",
     "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/shape-rendering"
   },
+  "speak-as": {
+    "syntax": "normal | spell-out || digits || [ literal-punctuation | no-punctuation ]",
+    "media": "visual",
+    "inherited": true,
+    "animationType": "discrete",
+    "percentages": "no",
+    "groups": [
+      "CSS Speech"
+    ],
+    "initial": "auto",
+    "appliesto": "allElements",
+    "computed": "specifiedValue",
+    "order": "perGrammar",
+    "status": "experimental"
+  },
   "stop-color": {
     "syntax": "<'color'>",
     "media": "visual",
diff --git a/css/properties.schema.json b/css/properties.schema.json
index 939cd952..5a1d41a8 100644
--- a/css/properties.schema.json
+++ b/css/properties.schema.json
@@ -167,6 +167,7 @@
         "sameAsMinWidthAndMinHeight",
         "sameAsWidthAndHeight",
         "specifiedIntegerOrAbsoluteLength",
+        "specifiedValue",
         "specifiedValueClipped0To1",
         "specifiedValueNumberClipped0To1",
         "theComputedLengthAndVisualBox",
diff --git a/l10n/css.json b/l10n/css.json
index 84fef40a..d7f374a0 100644
--- a/l10n/css.json
+++ b/l10n/css.json
@@ -1719,6 +1719,9 @@
     "ja": "指定された整数値または絶対的な長さ",
     "ru": "указанное целое число или абсолютная длина"
   },
+  "specifiedValue": {
+    "en-US": "specified value"
+  },
   "specifiedValueClipped0To1": {
     "de": "der angegebene Wert, auf den Bereich <code>[0,1]</code> abgeschnitten",
     "en-US": "the specified value, clipped in the range <code>[0,1]</code>",