diff --git a/showcase/yarn.lock b/showcase/yarn.lock
index 2999fa3..782b932 100644
--- a/showcase/yarn.lock
+++ b/showcase/yarn.lock
@@ -1297,12 +1297,13 @@ setimmediate@^1.0.4, setimmediate@^1.0.5:
   integrity sha1-KQy7Iy4waULX1+qbg3Mqt4VvgoU=
 
 sha.js@^2.4.0, sha.js@^2.4.8:
-  version "2.4.11"
-  resolved "https://registry.yarnpkg.com/sha.js/-/sha.js-2.4.11.tgz#37a5cf0b81ecbc6943de109ba2960d1b26584ae7"
-  integrity sha512-QMEp5B7cftE7APOjk5Y6xgrbWu+WkLVQwk8JNjZ8nKRciZaByEW6MubieAiToS7+dwvrjGhH8jRXz3MVd0AYqQ==
+  version "2.4.12"
+  resolved "https://registry.yarnpkg.com/sha.js/-/sha.js-2.4.12.tgz#eb8b568bf383dfd1867a32c3f2b74eb52bdbf23f"
+  integrity sha512-8LzC5+bvI45BjpfXU8V5fdU2mfeKiQe1D1gIMn7XUlF3OTUrpdJpPPH4EMAnF0DsHHdSZqCdSss5qCmJKuiO3w==
   dependencies:
-    inherits "^2.0.1"
-    safe-buffer "^5.0.1"
+    inherits "^2.0.4"
+    safe-buffer "^5.2.1"
+    to-buffer "^1.2.0"
 
 shadow-cljs-jar@1.3.2:
   version "1.3.2"
@@ -1424,7 +1425,7 @@ to-arraybuffer@^1.0.0:
   resolved "https://registry.yarnpkg.com/to-arraybuffer/-/to-arraybuffer-1.0.1.tgz#7d229b1fcc637e466ca081180836a7aabff83f43"
   integrity sha1-fSKbH8xjfkZsoIEYCDanqr/4P0M=
 
-to-buffer@^1.2.2:
+to-buffer@^1.2.0, to-buffer@^1.2.2:
   version "1.2.2"
   resolved "https://registry.yarnpkg.com/to-buffer/-/to-buffer-1.2.2.tgz#ffe59ef7522ada0a2d1cb5dfe03bb8abc3cdc133"
   integrity sha512-db0E3UJjcFhpDhAF4tLo03oli3pwl3dbnzXOUIlRKrp+ldk/VUxzpWYZENsw2SZiuBjHAk7DfB0VU7NKdpb6sw==