diff --git a/submit/prj2-sol/package-lock.json b/submit/prj2-sol/package-lock.json
index a45f63a..3f30b0b 100644
--- a/submit/prj2-sol/package-lock.json
+++ b/submit/prj2-sol/package-lock.json
@@ -26,9 +26,9 @@
       "integrity": "sha1-trvgsGdLnXGXCMo43owjfLUmw9E="
     },
     "bl": {
-      "version": "2.2.0",
-      "resolved": "https://registry.npmjs.org/bl/-/bl-2.2.0.tgz",
-      "integrity": "sha512-wbgvOpqopSr7uq6fJrLH8EsvYMJf9gzfo2jCsL2eTy75qXPukA4pCgHamOQkZtY5vmfVtjB+P3LNlMHW5CEZXA==",
+      "version": "2.2.1",
+      "resolved": "https://registry.npmjs.org/bl/-/bl-2.2.1.tgz",
+      "integrity": "sha512-6Pesp1w0DEX1N550i/uGV/TqucVL4AM/pgThFSN/Qq9si1/DF9aIHs1BxD8V/QU0HoeHO6cQRTAuYnLPKq1e4g==",
       "requires": {
         "readable-stream": "^2.3.5",
         "safe-buffer": "^5.1.1"