diff --git a/ast-codec/elm.json b/ast-codec/elm.json
index e99a777ed..bf2ba3def 100644
--- a/ast-codec/elm.json
+++ b/ast-codec/elm.json
@@ -9,7 +9,7 @@
             "MartinSStewart/elm-serialize": "1.2.0",
             "elm/core": "1.0.5",
             "elm/json": "1.1.3",
-            "stil4m/elm-syntax": "7.1.3"
+            "stil4m/elm-syntax": "7.3.6"
         },
         "indirect": {
             "bburdette/toop": "1.0.1",