diff --git a/grammar.js b/grammar.js
index 7410ee2fa..46c1657b5 100644
--- a/grammar.js
+++ b/grammar.js
@@ -576,14 +576,20 @@ module.exports = grammar({
         'eqnarray*',
         'align',
         'align*',
+        'aligned',
+        'aligned*',
         'array',
         'array*',
         'split',
         'split*',
         'alignat',
         'alignat*',
+        'alignedat',
+        'alignedat*',
         'gather',
         'gather*',
+        'gathered',
+        'gathered*',
         'flalign',
         'flalign*',
       ),
diff --git a/src/grammar.json b/src/grammar.json
index 04b55c0ac..f24031fe3 100644
--- a/src/grammar.json
+++ b/src/grammar.json
@@ -3893,6 +3893,14 @@
                   "type": "STRING",
                   "value": "align*"
                 },
+                {
+                  "type": "STRING",
+                  "value": "aligned"
+                },
+                {
+                  "type": "STRING",
+                  "value": "aligned*"
+                },
                 {
                   "type": "STRING",
                   "value": "array"
@@ -3917,6 +3925,14 @@
                   "type": "STRING",
                   "value": "alignat*"
                 },
+                {
+                  "type": "STRING",
+                  "value": "alignedat"
+                },
+                {
+                  "type": "STRING",
+                  "value": "alignedat*"
+                },
                 {
                   "type": "STRING",
                   "value": "gather"
@@ -3925,6 +3941,14 @@
                   "type": "STRING",
                   "value": "gather*"
                 },
+                {
+                  "type": "STRING",
+                  "value": "gathered"
+                },
+                {
+                  "type": "STRING",
+                  "value": "gathered*"
+                },
                 {
                   "type": "STRING",
                   "value": "flalign"