diff --git a/grammar.js b/grammar.js
index 1dbf62b..da69a22 100644
--- a/grammar.js
+++ b/grammar.js
@@ -12,10 +12,8 @@ module.exports = grammar({
     connection: ($) =>
       seq(
         $.identifier,
-        choice(
-          seq(seq($.arrow, $.identifier, $._colon, $.label)),
-          seq(repeat1(seq($.arrow, $.identifier)))
-        ),
+        repeat1(seq($.arrow, $.identifier)),
+        optional(seq($._colon, $.label)),
         $._end
       ),
 
diff --git a/src/grammar.json b/src/grammar.json
index da84d96..2c275d2 100644
--- a/src/grammar.json
+++ b/src/grammar.json
@@ -33,6 +33,22 @@
           "type": "SYMBOL",
           "name": "identifier"
         },
+        {
+          "type": "REPEAT1",
+          "content": {
+            "type": "SEQ",
+            "members": [
+              {
+                "type": "SYMBOL",
+                "name": "arrow"
+              },
+              {
+                "type": "SYMBOL",
+                "name": "identifier"
+              }
+            ]
+          }
+        },
         {
           "type": "CHOICE",
           "members": [
@@ -40,48 +56,17 @@
               "type": "SEQ",
               "members": [
                 {
-                  "type": "SEQ",
-                  "members": [
-                    {
-                      "type": "SYMBOL",
-                      "name": "arrow"
-                    },
-                    {
-                      "type": "SYMBOL",
-                      "name": "identifier"
-                    },
-                    {
-                      "type": "SYMBOL",
-                      "name": "_colon"
-                    },
-                    {
-                      "type": "SYMBOL",
-                      "name": "label"
-                    }
-                  ]
+                  "type": "SYMBOL",
+                  "name": "_colon"
+                },
+                {
+                  "type": "SYMBOL",
+                  "name": "label"
                 }
               ]
             },
             {
-              "type": "SEQ",
-              "members": [
-                {
-                  "type": "REPEAT1",
-                  "content": {
-                    "type": "SEQ",
-                    "members": [
-                      {
-                        "type": "SYMBOL",
-                        "name": "arrow"
-                      },
-                      {
-                        "type": "SYMBOL",
-                        "name": "identifier"
-                      }
-                    ]
-                  }
-                }
-              ]
+              "type": "BLANK"
             }
           ]
         },
diff --git a/src/parser.c b/src/parser.c
index 1ab4615..e221615 100644
Binary files a/src/parser.c and b/src/parser.c differ