diff --git a/grammar.js b/grammar.js
index cfc6bc6..44ddff0 100644
--- a/grammar.js
+++ b/grammar.js
@@ -132,7 +132,7 @@ module.exports = grammar({
     insert_items: ($) =>
       choice(
         seq(kw("default"), kw("values")),
-        seq(kw("values"), $.insert_values, repeat(seq(",", $.insert_values))),
+        seq(kw("values"), commaSep1($.insert_values)),
         $.select_statement,
         seq("(", $.select_statement, ")")
       ),
diff --git a/src/grammar.json b/src/grammar.json
index b7486b9..076c56f 100644
--- a/src/grammar.json
+++ b/src/grammar.json
@@ -842,24 +842,29 @@
               "value": "values"
             },
             {
-              "type": "SYMBOL",
-              "name": "insert_values"
-            },
-            {
-              "type": "REPEAT",
-              "content": {
-                "type": "SEQ",
-                "members": [
-                  {
-                    "type": "STRING",
-                    "value": ","
-                  },
-                  {
-                    "type": "SYMBOL",
-                    "name": "insert_values"
+              "type": "SEQ",
+              "members": [
+                {
+                  "type": "SYMBOL",
+                  "name": "insert_values"
+                },
+                {
+                  "type": "REPEAT",
+                  "content": {
+                    "type": "SEQ",
+                    "members": [
+                      {
+                        "type": "STRING",
+                        "value": ","
+                      },
+                      {
+                        "type": "SYMBOL",
+                        "name": "insert_values"
+                      }
+                    ]
                   }
-                ]
-              }
+                }
+              ]
             }
           ]
         },