diff --git a/extensions/fsharp/syntaxes/fsharp.json b/extensions/fsharp/syntaxes/fsharp.json
index ca1fdacfab5..a47bc570fbe 100644
--- a/extensions/fsharp/syntaxes/fsharp.json
+++ b/extensions/fsharp/syntaxes/fsharp.json
@@ -4,7 +4,7 @@
 		"If you want to provide a fix or improvement, please create a pull request against the original repository.",
 		"Once accepted there, we are happy to receive an update request."
 	],
-	"version": "https://github.com/ionide/ionide-fsgrammar/commit/7a24912ecdc886e4d973d6d3ab8df20a0feeda76",
+	"version": "https://github.com/ionide/ionide-fsgrammar/commit/9aa4b1055e3173225bc0d4b4e48542c2450beb99",
 	"name": "fsharp",
 	"scopeName": "source.fsharp",
 	"fileTypes": [
@@ -187,7 +187,7 @@
 			"patterns": [
 				{
 					"name": "keyword.other.fsharp",
-					"match": "\\b(function|yield!|yield|class|match|delegate|of|new|in|as|if|then|else|elif|for|begin|end|inherit|do|let\\!|return\\!|return|interface|with|abstract|member|try|finally|and|when|use|use\\!|struct|while|mutable)\\b"
+					"match": "\\b(function|yield!|yield|class|match|delegate|of|new|in|as|if|then|else|elif|for|begin|end|inherit|do|let\\!|return\\!|return|interface|with|abstract|property|union|enum|member|try|finally|and|when|use|use\\!|struct|while|mutable)\\b"
 				},
 				{
 					"name": "meta.preprocessor.fsharp",