diff --git a/extension/.cspell.json b/extension/.cspell.json
index d18282a7..bdfb4719 100644
--- a/extension/.cspell.json
+++ b/extension/.cspell.json
@@ -10,6 +10,7 @@
     "arbitrum",
     "barnbridge",
     "bitshift",
+    "Bitmask",
     "Blockhash",
     "blockie",
     "blockies",