diff --git a/grammars/grammar-tact.json b/grammars/grammar-tact.json
index c521fb58..ba203f25 100644
--- a/grammars/grammar-tact.json
+++ b/grammars/grammar-tact.json
@@ -175,7 +175,7 @@
       ]
     },
     "operator-logic": {
-      "match": "(==|<(?!<)|<=|>(?!>)|>=|\\&\\&|\\|\\||\\:(?!=)|\\?)",
+      "match": "(==|<(?!<)|<=|>(?!>)|>=|\\&\\&|\\|\\||\\:(?!=)|\\?|!|!!|!=)",
       "name": "keyword.operator.logic"
     },
     "operator-mapping": {