diff --git a/package.json b/package.json
index 231e70ff..0550a040 100644
--- a/package.json
+++ b/package.json
@@ -63,7 +63,7 @@
     "stringifier": "2.1.0",
     "truffle": "5.1.44",
     "@truffle/hdwallet-provider": "1.0.44",
-    "wait-on": "5.2.0"
+    "wait-on": "6.0.0"
   },
   "files": [
     "abiniser"
diff --git a/yarn.lock b/yarn.lock
index b18a5496..afa1b11a 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -199,28 +199,11 @@
     "@ethersproject/rlp" "^5.0.3"
     "@ethersproject/signing-key" "^5.0.4"
 
-"@hapi/address@^4.1.0":
-  version "4.1.0"
-  resolved "https://registry.yarnpkg.com/@hapi/address/-/address-4.1.0.tgz#d60c5c0d930e77456fdcde2598e77302e2955e1d"
-  integrity sha512-SkszZf13HVgGmChdHo/PxchnSaCJ6cetVqLzyciudzZRT0jcOouIF/Q93mgjw8cce+D+4F4C1Z/WrfFN+O3VHQ==
-  dependencies:
-    "@hapi/hoek" "^9.0.0"
-
-"@hapi/formula@^2.0.0":
-  version "2.0.0"
-  resolved "https://registry.yarnpkg.com/@hapi/formula/-/formula-2.0.0.tgz#edade0619ed58c8e4f164f233cda70211e787128"
-  integrity sha512-V87P8fv7PI0LH7LiVi8Lkf3x+KCO7pQozXRssAHNXXL9L1K+uyu4XypLXwxqVDKgyQai6qj3/KteNlrqDx4W5A==
-
 "@hapi/hoek@^9.0.0":
   version "9.1.0"
   resolved "https://registry.yarnpkg.com/@hapi/hoek/-/hoek-9.1.0.tgz#6c9eafc78c1529248f8f4d92b0799a712b6052c6"
   integrity sha512-i9YbZPN3QgfighY/1X1Pu118VUz2Fmmhd6b2n0/O8YVgGGfw0FbUYoA97k7FkpGJ+pLCFEDLUmAPPV4D1kpeFw==
 
-"@hapi/pinpoint@^2.0.0":
-  version "2.0.0"
-  resolved "https://registry.yarnpkg.com/@hapi/pinpoint/-/pinpoint-2.0.0.tgz#805b40d4dbec04fc116a73089494e00f073de8df"
-  integrity sha512-vzXR5MY7n4XeIvLpfl3HtE3coZYO4raKXW766R6DZw/6aLqR26iuZ109K7a0NtF2Db0jxqh7xz2AxkUwpUFybw==
-
 "@hapi/topo@^5.0.0":
   version "5.0.0"
   resolved "https://registry.yarnpkg.com/@hapi/topo/-/topo-5.0.0.tgz#c19af8577fa393a06e9c77b60995af959be721e7"
@@ -249,6 +232,23 @@
     "@nodelib/fs.scandir" "2.1.3"
     fastq "^1.6.0"
 
+"@sideway/address@^4.1.0":
+  version "4.1.2"
+  resolved "https://registry.yarnpkg.com/@sideway/address/-/address-4.1.2.tgz#811b84333a335739d3969cfc434736268170cad1"
+  integrity sha512-idTz8ibqWFrPU8kMirL0CoPH/A29XOzzAzpyN3zQ4kAWnzmNfFmRaoMNN6VI8ske5M73HZyhIaW4OuSFIdM4oA==
+  dependencies:
+    "@hapi/hoek" "^9.0.0"
+
+"@sideway/formula@^3.0.0":
+  version "3.0.0"
+  resolved "https://registry.yarnpkg.com/@sideway/formula/-/formula-3.0.0.tgz#fe158aee32e6bd5de85044be615bc08478a0a13c"
+  integrity sha512-vHe7wZ4NOXVfkoRb8T5otiENVlT7a3IAiw7H5M2+GO+9CDgcVUUsX1zalAztCmwyOr2RUTGJdgB+ZvSVqmdHmg==
+
+"@sideway/pinpoint@^2.0.0":
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/@sideway/pinpoint/-/pinpoint-2.0.0.tgz#cff8ffadc372ad29fd3f78277aeb29e632cc70df"
+  integrity sha512-RNiOoTPkptFtSVzQevY/yWtZwf/RxyVnPy/OcA9HBM3MlGDnBEYL5B41H0MTn0Uec8Hi+2qUtTfG2WWZBmMejQ==
+
 "@sindresorhus/is@^0.14.0":
   version "0.14.0"
   resolved "https://registry.yarnpkg.com/@sindresorhus/is/-/is-0.14.0.tgz#9fb3a3cf3132328151f353de4632e01e52102bea"
@@ -696,12 +696,12 @@ aws4@^1.8.0:
   resolved "https://registry.yarnpkg.com/aws4/-/aws4-1.10.1.tgz#e1e82e4f3e999e2cfd61b161280d16a111f86428"
   integrity sha512-zg7Hz2k5lI8kb7U32998pRRFin7zJlkfezGJjUc2heaD4Pw2wObakCDVzkKztTm/Ln7eiVvYsjqak0Ed4LkMDA==
 
-axios@^0.19.2:
-  version "0.19.2"
-  resolved "https://registry.yarnpkg.com/axios/-/axios-0.19.2.tgz#3ea36c5d8818d0d5f8a8a97a6d36b86cdc00cb27"
-  integrity sha512-fjgm5MvRHLhx+osE2xoekY70AhARk3a6hkN+3Io1jc00jtquGvxYlKlsFUhmUET0V5te6CcZI7lcv2Ym61mjHA==
+axios@^0.21.1:
+  version "0.21.1"
+  resolved "https://registry.yarnpkg.com/axios/-/axios-0.21.1.tgz#22563481962f4d6bde9a76d516ef0e5d3c09b2b8"
+  integrity sha512-dKQiRHxGD9PPRIUNIWvZhPTPpl1rf/OxTYKsqKUDjBwYylTvV7SjSHJb9ratfyzM6wCdLCOYLzs73qpg5c4iGA==
   dependencies:
-    follow-redirects "1.5.10"
+    follow-redirects "^1.10.0"
 
 backoff@^2.5.0:
   version "2.5.0"
@@ -1313,13 +1313,6 @@ debug@4.1.1, debug@^4.0.1, debug@^4.1.1:
   dependencies:
     ms "^2.1.1"
 
-debug@=3.1.0:
-  version "3.1.0"
-  resolved "https://registry.yarnpkg.com/debug/-/debug-3.1.0.tgz#5bb5a0672628b64149566ba16819e61518c67261"
-  integrity sha512-OX8XqP7/1a9cqkxYw2yXss15f26NKWBpDXQd0/uK/KPqdQhxbPa994hnzjcE2VqQpDslf55723cKPUOGSmMY3g==
-  dependencies:
-    ms "2.0.0"
-
 decamelize@^1.2.0:
   version "1.2.0"
   resolved "https://registry.yarnpkg.com/decamelize/-/decamelize-1.2.0.tgz#f6534d15148269b20352e7bee26f501f9a191290"
@@ -2344,12 +2337,10 @@ flatted@^2.0.0:
   resolved "https://registry.yarnpkg.com/flatted/-/flatted-2.0.2.tgz#4575b21e2bcee7434aa9be662f4b7b5f9c2b5138"
   integrity sha512-r5wGx7YeOwNWNlCA0wQ86zKyDLMQr+/RB8xy74M4hTphfmjlijTSSXGuH8rnvKZnfT9i+75zmd8jcKdMR4O6jA==
 
-follow-redirects@1.5.10:
-  version "1.5.10"
-  resolved "https://registry.yarnpkg.com/follow-redirects/-/follow-redirects-1.5.10.tgz#7b7a9f9aea2fdff36786a94ff643ed07f4ff5e2a"
-  integrity sha512-0V5l4Cizzvqt5D44aTXbFZz+FtyXV1vrDN6qrelxtfYQKW0KO0W2T/hkE8xvGa/540LkZlkaUjO4ailYTFtHVQ==
-  dependencies:
-    debug "=3.1.0"
+follow-redirects@^1.10.0:
+  version "1.14.1"
+  resolved "https://registry.yarnpkg.com/follow-redirects/-/follow-redirects-1.14.1.tgz#d9114ded0a1cfdd334e164e6662ad02bfd91ff43"
+  integrity sha512-HWqDgT7ZEkqRzBvc2s64vSZ/hfOceEol3ac/7tKwzuvEyWx3/4UegXh5oBOIotkGsObyk3xznnSRVADBgWSQVg==
 
 forever-agent@~0.6.1:
   version "0.6.1"
@@ -3029,16 +3020,16 @@ iterate-value@^1.0.0:
     es-get-iterator "^1.0.2"
     iterate-iterator "^1.0.1"
 
-joi@^17.1.1:
-  version "17.2.1"
-  resolved "https://registry.yarnpkg.com/joi/-/joi-17.2.1.tgz#e5140fdf07e8fecf9bc977c2832d1bdb1e3f2a0a"
-  integrity sha512-YT3/4Ln+5YRpacdmfEfrrKh50/kkgX3LgBltjqnlMPIYiZ4hxXZuVJcxmsvxsdeHg9soZfE3qXxHC2tMpCCBOA==
+joi@^17.4.0:
+  version "17.4.0"
+  resolved "https://registry.yarnpkg.com/joi/-/joi-17.4.0.tgz#b5c2277c8519e016316e49ababd41a1908d9ef20"
+  integrity sha512-F4WiW2xaV6wc1jxete70Rw4V/VuMd6IN+a5ilZsxG4uYtUXWu2kq9W5P2dz30e7Gmw8RCbY/u/uk+dMPma9tAg==
   dependencies:
-    "@hapi/address" "^4.1.0"
-    "@hapi/formula" "^2.0.0"
     "@hapi/hoek" "^9.0.0"
-    "@hapi/pinpoint" "^2.0.0"
     "@hapi/topo" "^5.0.0"
+    "@sideway/address" "^4.1.0"
+    "@sideway/formula" "^3.0.0"
+    "@sideway/pinpoint" "^2.0.0"
 
 js-sha3@0.5.7, js-sha3@^0.5.7:
   version "0.5.7"
@@ -3273,10 +3264,10 @@ lodash.toarray@^4.4.0:
   resolved "https://registry.yarnpkg.com/lodash.toarray/-/lodash.toarray-4.4.0.tgz#24c4bfcd6b2fba38bfd0594db1179d8e9b656561"
   integrity sha1-JMS/zWsvuji/0FlNsRedjptlZWE=
 
-lodash@^4.17.13, lodash@^4.17.14, lodash@^4.17.15, lodash@^4.17.19:
-  version "4.17.20"
-  resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.20.tgz#b44a9b6297bcb698f1c51a3545a2b3b368d59c52"
-  integrity sha512-PlhdFcillOINfeV7Ni6oF1TAEayyZBoZ8bcshTHqOYJYlrqzRK5hagpagky5o4HfCzzd1TRkXPMFq6cKk9rGmA==
+lodash@^4.17.13, lodash@^4.17.14, lodash@^4.17.15, lodash@^4.17.19, lodash@^4.17.21:
+  version "4.17.21"
+  resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.21.tgz#679591c564c3bffaae8454cf0b3df370c3d6911c"
+  integrity sha512-v2kDEe57lecTulaDIuNTPy3Ry4gLGJ6Z1O3vE1krgXZNrsQ+LFTGHVxVjcXPs17LhbZVGedAJv8XZ1tvj5FvSg==
 
 log-driver@^1.2.7:
   version "1.2.7"
@@ -4324,12 +4315,12 @@ rustbn.js@~0.2.0:
   resolved "https://registry.yarnpkg.com/rustbn.js/-/rustbn.js-0.2.0.tgz#8082cb886e707155fd1cb6f23bd591ab8d55d0ca"
   integrity sha512-4VlvkRUuCJvr2J6Y0ImW7NvTCriMi7ErOAqWk1y69vAdoNIzCF3yPmgeNzx+RQTLEDFq5sHfscn1MwHxP9hNfA==
 
-rxjs@^6.5.5:
-  version "6.6.3"
-  resolved "https://registry.yarnpkg.com/rxjs/-/rxjs-6.6.3.tgz#8ca84635c4daa900c0d3967a6ee7ac60271ee552"
-  integrity sha512-trsQc+xYYXZ3urjOiJOuCOa5N3jAZ3eiSpQB5hIT8zGlL2QfnHLJ2r7GMkBGuIausdJN1OneaI6gQlsqNHHmZQ==
+rxjs@^7.1.0:
+  version "7.1.0"
+  resolved "https://registry.yarnpkg.com/rxjs/-/rxjs-7.1.0.tgz#94202d27b19305ef7b1a4f330277b2065df7039e"
+  integrity sha512-gCFO5iHIbRPwznl6hAYuwNFld8W4S2shtSJIqG27ReWXo9IWrCyEICxUA+6vJHwSR/OakoenC4QsDxq50tzYmw==
   dependencies:
-    tslib "^1.9.0"
+    tslib "~2.1.0"
 
 safe-buffer@5.1.2, safe-buffer@~5.1.0, safe-buffer@~5.1.1:
   version "5.1.2"
@@ -4975,10 +4966,10 @@ truffle@5.1.44:
     mocha "8.1.2"
     original-require "1.0.1"
 
-tslib@^1.9.0:
-  version "1.13.0"
-  resolved "https://registry.yarnpkg.com/tslib/-/tslib-1.13.0.tgz#c881e13cc7015894ed914862d276436fa9a47043"
-  integrity sha512-i/6DQjL8Xf3be4K/E6Wgpekn5Qasl1usyw++dAA35Ue5orEn65VIxOA+YvNNl9HV3qv70T7CNwjODHZrLwvd1Q==
+tslib@~2.1.0:
+  version "2.1.0"
+  resolved "https://registry.yarnpkg.com/tslib/-/tslib-2.1.0.tgz#da60860f1c2ecaa5703ab7d39bc05b6bf988b97a"
+  integrity sha512-hcVC3wYEziELGGmEEXue7D75zbwIIVUMWAVbHItGPx0ziyXxrOMQx4rQEVEV45Ut/1IotuEvwqPopzIOkDMf0A==
 
 tunnel-agent@^0.6.0:
   version "0.6.0"
@@ -5166,16 +5157,16 @@ verror@1.10.0:
     core-util-is "1.0.2"
     extsprintf "^1.2.0"
 
-wait-on@5.2.0:
-  version "5.2.0"
-  resolved "https://registry.yarnpkg.com/wait-on/-/wait-on-5.2.0.tgz#6711e74422523279714a36d52cf49fb47c9d9597"
-  integrity sha512-U1D9PBgGw2XFc6iZqn45VBubw02VsLwnZWteQ1au4hUVHasTZuFSKRzlTB2dqgLhji16YVI8fgpEpwUdCr8B6g==
+wait-on@6.0.0:
+  version "6.0.0"
+  resolved "https://registry.yarnpkg.com/wait-on/-/wait-on-6.0.0.tgz#7e9bf8e3d7fe2daecbb7a570ac8ca41e9311c7e7"
+  integrity sha512-tnUJr9p5r+bEYXPUdRseolmz5XqJTTj98JgOsfBn7Oz2dxfE2g3zw1jE+Mo8lopM3j3et/Mq1yW7kKX6qw7RVw==
   dependencies:
-    axios "^0.19.2"
-    joi "^17.1.1"
-    lodash "^4.17.19"
+    axios "^0.21.1"
+    joi "^17.4.0"
+    lodash "^4.17.21"
     minimist "^1.2.5"
-    rxjs "^6.5.5"
+    rxjs "^7.1.0"
 
 web3-bzz@1.2.1:
   version "1.2.1"