diff --git a/internal/lsp/semantic.go b/internal/lsp/semantic.go
index d8feea7..c6e9190 100644
--- a/internal/lsp/semantic.go
+++ b/internal/lsp/semantic.go
@@ -77,6 +77,9 @@
 		}
 		return template.SemanticTokens(ctx, snapshot, fh.URI(), add, data)
 	}
+	if fh.Kind() != source.Go {
+		return nil, nil
+	}
 	pkg, err := snapshot.PackageForFile(ctx, fh.URI(), source.TypecheckFull, source.WidestPackage)
 	if err != nil {
 		return nil, err