diff --git a/package.json b/package.json
index 183a28a1..6d3ae5e3 100644
--- a/package.json
+++ b/package.json
@@ -31,7 +31,7 @@
 	},
 	"devDependencies": {
 		"@effect/experimental": "0.58.0",
-		"@effect/language-service": "0.63.2",
+		"@effect/language-service": "0.64.1",
 		"@effect/opentelemetry": "0.60.0",
 		"@opentelemetry/exporter-trace-otlp-http": "0.208.0",
 		"@opentelemetry/sdk-logs": "0.208.0",