diff --git a/grammar.js b/grammar.js
index 17d3374..b9987e6 100644
--- a/grammar.js
+++ b/grammar.js
@@ -265,7 +265,8 @@ module.exports = grammar({
         "link",
         "italic",
         "bold",
-        "underline"
+        "underline",
+        "text-transform"
       ),
 
     _text_attr_key: ($) => "near",
diff --git a/src/grammar.json b/src/grammar.json
index ff4dd7a..08bf7eb 100644
--- a/src/grammar.json
+++ b/src/grammar.json
@@ -1086,6 +1086,10 @@
         {
           "type": "STRING",
           "value": "underline"
+        },
+        {
+          "type": "STRING",
+          "value": "text-transform"
         }
       ]
     },
diff --git a/src/node-types.json b/src/node-types.json
index 823463c..18b88b5 100644
--- a/src/node-types.json
+++ b/src/node-types.json
@@ -520,6 +520,10 @@
     "type": "target-arrowhead",
     "named": false
   },
+  {
+    "type": "text-transform",
+    "named": false
+  },
   {
     "type": "tooltip",
     "named": false
diff --git a/src/parser.c b/src/parser.c
index 6d3394e..e9074d9 100644
Binary files a/src/parser.c and b/src/parser.c differ
diff --git a/test/corpus/attributes.txt b/test/corpus/attributes.txt
index 5b6ca14..6e580a6 100644
--- a/test/corpus/attributes.txt
+++ b/test/corpus/attributes.txt
@@ -57,6 +57,7 @@ foo.style.shadow: false
 foo.style.multiple: true
 foo.style.animated: true
 foo.style.link: https://to
+foo.style.text-transform: uppercase
 
 --------------------------------------------------------------------------------
 
@@ -72,6 +73,7 @@ foo.style.link: https://to
   (shape (shape_key) (dot) (attribute (attr_key) (dot) (attribute (attr_key) (attr_value (boolean)))))
   (shape (shape_key) (dot) (attribute (attr_key) (dot) (attribute (attr_key) (attr_value (boolean)))))
   (shape (shape_key) (dot) (attribute (attr_key) (dot) (attribute (attr_key) (attr_value))))
+  (shape (shape_key) (dot) (attribute (attr_key) (dot) (attribute (attr_key) (attr_value))))
 )
 
 ================================================================================
@@ -89,6 +91,7 @@ foo.style: {
   multiple: true
   animated: true
   link: https://to
+  text-transform: uppercase
 }
 
 --------------------------------------------------------------------------------
@@ -110,6 +113,7 @@ foo.style: {
         (attribute (attr_key) (attr_value (boolean)))
         (attribute (attr_key) (attr_value (boolean)))
         (attribute (attr_key) (attr_value))
+        (attribute (attr_key) (attr_value))
       )
     )
   )