diff --git a/packages/oo7-substrate/yarn.lock b/packages/oo7-substrate/yarn.lock
index 8c3f3eb..2e93269 100644
--- a/packages/oo7-substrate/yarn.lock
+++ b/packages/oo7-substrate/yarn.lock
@@ -672,9 +672,9 @@ title-case@^2.1.0:
     upper-case "^1.0.3"
 
 tweetnacl@^1.0.0:
-  version "1.0.1"
-  resolved "https://registry.yarnpkg.com/tweetnacl/-/tweetnacl-1.0.1.tgz#2594d42da73cd036bd0d2a54683dd35a6b55ca17"
-  integrity sha512-kcoMoKTPYnoeS50tzoqjPY3Uv9axeuuFAZY9M/9zFnhoVvRfxz9K29IMPD7jGmt2c8SW7i3gT9WqDl2+nV7p4A==
+  version "1.0.2"
+  resolved "https://registry.yarnpkg.com/tweetnacl/-/tweetnacl-1.0.2.tgz#39fba8d1f7a34706a3fc1fd8c04afcad7bb9e689"
+  integrity sha512-+8aPRjmXgf1VqvyxSlBUzKzeYqVS9Ai8vZ28g+mL7dNQl1jlUTCMDZnvNQdAS1xTywMkIXwJsfipsR/6s2+syw==
 
 type-detect@^4.0.0, type-detect@^4.0.5:
   version "4.0.8"