diff --git a/packages/oo7-substrate/package.json b/packages/oo7-substrate/package.json
index bd24eba..045fb36 100644
--- a/packages/oo7-substrate/package.json
+++ b/packages/oo7-substrate/package.json
@@ -31,7 +31,7 @@
     "blakejs": "^1.1.0",
     "bs58": "^4.0.1",
     "buffer": "^5.2.1",
-    "change-case": "^3.0.2",
+    "change-case": "^4.1.0",
     "isomorphic-fetch": "^2.2.1",
     "isomorphic-ws": "^4.0.1",
     "jdenticon": "^2.1.1",
diff --git a/packages/oo7-substrate/yarn.lock b/packages/oo7-substrate/yarn.lock
index 8c3f3eb..c2fe7f5 100644
--- a/packages/oo7-substrate/yarn.lock
+++ b/packages/oo7-substrate/yarn.lock
@@ -139,13 +139,13 @@ buffer@^5.2.1:
     base64-js "^1.0.2"
     ieee754 "^1.1.4"
 
-camel-case@^3.0.0:
-  version "3.0.0"
-  resolved "https://registry.yarnpkg.com/camel-case/-/camel-case-3.0.0.tgz#ca3c3688a4e9cf3a4cda777dc4dcbc713249cf73"
-  integrity sha1-yjw2iKTpzzpM2nd9xNy8cTJJz3M=
+camel-case@^4.1.0:
+  version "4.1.0"
+  resolved "https://registry.yarnpkg.com/camel-case/-/camel-case-4.1.0.tgz#bdfcea5134eb8dc928e13c1ee84fd5635ba65e25"
+  integrity sha512-vmHTVppun53Le+K8wHxA0f4oI192u2i6eL9qHrqByibpxRbdkvI1o1fAA6ozxpLGEnsDS3MBjPJAi7ArJU9ZDg==
   dependencies:
-    no-case "^2.2.0"
-    upper-case "^1.1.1"
+    pascal-case "^3.1.0"
+    tslib "^1.10.0"
 
 camelcase@^5.2.0:
   version "5.2.0"
@@ -157,6 +157,15 @@ canvas-renderer@~2.1.1:
   resolved "https://registry.yarnpkg.com/canvas-renderer/-/canvas-renderer-2.1.1.tgz#d91fe9511ab48056ff9fa8a04514bede76535f55"
   integrity sha512-/V0XetN7s1Mk3NO7x2wxPZYv0pLMQtGAhecuOuKR88beiYCUle1AbCcFZNLu+4NVzi9RVHS0rXtIgzPEaKidLw==
 
+capital-case@^1.0.2:
+  version "1.0.2"
+  resolved "https://registry.yarnpkg.com/capital-case/-/capital-case-1.0.2.tgz#d82a7b3430c521ce700b397bd21b979843a731db"
+  integrity sha512-7dF2q6pv+qqMkFG+AS0c6/UnYAL5ldR2rUbjKoJrHz9S0bn14jOLIpXxwabIeyakcRWNeGguWzNxJRPAGe4lFA==
+  dependencies:
+    no-case "^3.0.2"
+    tslib "^1.10.0"
+    upper-case-first "^2.0.1"
+
 chai@^4.2.0:
   version "4.2.0"
   resolved "https://registry.yarnpkg.com/chai/-/chai-4.2.0.tgz#760aa72cf20e3795e84b12877ce0e83737aa29e5"
@@ -178,29 +187,23 @@ chalk@^2.4.2:
     escape-string-regexp "^1.0.5"
     supports-color "^5.3.0"
 
-change-case@^3.0.2:
-  version "3.1.0"
-  resolved "https://registry.yarnpkg.com/change-case/-/change-case-3.1.0.tgz#0e611b7edc9952df2e8513b27b42de72647dd17e"
-  integrity sha512-2AZp7uJZbYEzRPsFoa+ijKdvp9zsrnnt6+yFokfwEpeJm0xuJDVoxiRCAaTzyJND8GJkofo2IcKWaUZ/OECVzw==
-  dependencies:
-    camel-case "^3.0.0"
-    constant-case "^2.0.0"
-    dot-case "^2.1.0"
-    header-case "^1.0.0"
-    is-lower-case "^1.1.0"
-    is-upper-case "^1.1.0"
-    lower-case "^1.1.1"
-    lower-case-first "^1.0.0"
-    no-case "^2.3.2"
-    param-case "^2.1.0"
-    pascal-case "^2.0.0"
-    path-case "^2.1.0"
-    sentence-case "^2.1.0"
-    snake-case "^2.1.0"
-    swap-case "^1.1.0"
-    title-case "^2.1.0"
-    upper-case "^1.1.1"
-    upper-case-first "^1.1.0"
+change-case@^4.1.0:
+  version "4.1.0"
+  resolved "https://registry.yarnpkg.com/change-case/-/change-case-4.1.0.tgz#3db027d8655ee11b0eaf2adf14c1c9449572a857"
+  integrity sha512-jz4NjT8d6J9ggFuGHJ860Trta1IXjtnG+T3HGKdN/9ihDefiN241SQhJlD/fbNdiH4YUwPAp00X030vqc/LRcw==
+  dependencies:
+    camel-case "^4.1.0"
+    capital-case "^1.0.2"
+    constant-case "^3.0.2"
+    dot-case "^3.0.2"
+    header-case "^2.0.2"
+    no-case "^3.0.2"
+    param-case "^3.0.2"
+    pascal-case "^3.1.0"
+    path-case "^3.0.2"
+    sentence-case "^3.0.2"
+    snake-case "^3.0.2"
+    tslib "^1.10.0"
 
 check-error@^1.0.2:
   version "1.0.2"
@@ -237,13 +240,14 @@ concat-map@0.0.1:
   resolved "https://registry.yarnpkg.com/concat-map/-/concat-map-0.0.1.tgz#d8a96bd77fd68df7793a73036a3ba0d5405d477b"
   integrity sha1-2Klr13/Wjfd5OnMDajug1UBdR3s=
 
-constant-case@^2.0.0:
-  version "2.0.0"
-  resolved "https://registry.yarnpkg.com/constant-case/-/constant-case-2.0.0.tgz#4175764d389d3fa9c8ecd29186ed6005243b6a46"
-  integrity sha1-QXV2TTidP6nI7NKRhu1gBSQ7akY=
+constant-case@^3.0.2:
+  version "3.0.2"
+  resolved "https://registry.yarnpkg.com/constant-case/-/constant-case-3.0.2.tgz#e05225ae43e872b208b72de655bcb88143db3ec2"
+  integrity sha512-VxthHv7/VKSXl9kToCoulqM5hH6KpLdAdBCRMFj1SzaHTHMZkQYbRlMwEiLHYJfMN7xE8UiUtyBAJjPXOtbjjA==
   dependencies:
-    snake-case "^2.1.0"
-    upper-case "^1.1.1"
+    no-case "^3.0.2"
+    tslib "^1.10.0"
+    upper-case "^2.0.1"
 
 create-hash@^1.1.0, create-hash@^1.1.2:
   version "1.2.0"
@@ -292,12 +296,13 @@ diff@3.5.0:
   resolved "https://registry.yarnpkg.com/diff/-/diff-3.5.0.tgz#800c0dd1e0a8bfbc95835c202ad220fe317e5a12"
   integrity sha512-A46qtFgd+g7pDZinpnwiRJtxbC1hpgf0uzP3iG89scHk0AUC7A1TGxf5OiiOUv/JMZR8GOt8hL900hV0bOy5xA==
 
-dot-case@^2.1.0:
-  version "2.1.1"
-  resolved "https://registry.yarnpkg.com/dot-case/-/dot-case-2.1.1.tgz#34dcf37f50a8e93c2b3bca8bb7fb9155c7da3bee"
-  integrity sha1-NNzzf1Co6TwrO8qLt/uRVcfaO+4=
+dot-case@^3.0.2:
+  version "3.0.2"
+  resolved "https://registry.yarnpkg.com/dot-case/-/dot-case-3.0.2.tgz#6758d86d3e7b69adc0fcfad23a845676c329f7d9"
+  integrity sha512-z3vMZEW2o3btKlM9I6FQF0pIWTzBuW+udrAaJr+A6JA3+p62ADZjeFthKxqxKHZlUxQmkKeEWvaKLJdwpc5u6g==
   dependencies:
-    no-case "^2.2.0"
+    no-case "^3.0.2"
+    tslib "^1.10.0"
 
 encoding@^0.1.11:
   version "0.1.12"
@@ -356,13 +361,13 @@ he@1.1.1:
   resolved "https://registry.yarnpkg.com/he/-/he-1.1.1.tgz#93410fd21b009735151f8868c2f271f3427e23fd"
   integrity sha1-k0EP0hsAlzUVH4howvJx80J+I/0=
 
-header-case@^1.0.0:
-  version "1.0.1"
-  resolved "https://registry.yarnpkg.com/header-case/-/header-case-1.0.1.tgz#9535973197c144b09613cd65d317ef19963bd02d"
-  integrity sha1-lTWXMZfBRLCWE81l0xfvGZY70C0=
+header-case@^2.0.2:
+  version "2.0.2"
+  resolved "https://registry.yarnpkg.com/header-case/-/header-case-2.0.2.tgz#0e4105f6a2489afdf40cfb65c6b24728d1d02ab2"
+  integrity sha512-DkrKDkNEXG3ZC3urlbt+O9j9qbwFvJwDB1PSKBQqZLVbh2wr7PKpfjGWo/Dw9cpG1IqZM6QTsnVsB3FwdCuEkg==
   dependencies:
-    no-case "^2.2.0"
-    upper-case "^1.1.3"
+    capital-case "^1.0.2"
+    tslib "^1.10.0"
 
 iconv-lite@~0.4.13:
   version "0.4.24"
@@ -394,25 +399,11 @@ ip-regex@^4.0.0:
   resolved "https://registry.yarnpkg.com/ip-regex/-/ip-regex-4.0.0.tgz#0120e0558a355604d511709c831a19adf8487b10"
   integrity sha512-3WQiamA4s/EGI9WxXhSWeR7X+fYxD7LqjJ0nIjMwXYSLOuJ2/ix13QOLvy/TGRDKEhhfLzHnCduANvdCIsn/+A==
 
-is-lower-case@^1.1.0:
-  version "1.1.3"
-  resolved "https://registry.yarnpkg.com/is-lower-case/-/is-lower-case-1.1.3.tgz#7e147be4768dc466db3bfb21cc60b31e6ad69393"
-  integrity sha1-fhR75HaNxGbbO/shzGCzHmrWk5M=
-  dependencies:
-    lower-case "^1.1.0"
-
 is-stream@^1.0.1:
   version "1.1.0"
   resolved "https://registry.yarnpkg.com/is-stream/-/is-stream-1.1.0.tgz#12d4a3dd4e68e0b79ceb8dbc84173ae80d91ca44"
   integrity sha1-EtSj3U5o4Lec6428hBc66A2RykQ=
 
-is-upper-case@^1.1.0:
-  version "1.1.2"
-  resolved "https://registry.yarnpkg.com/is-upper-case/-/is-upper-case-1.1.2.tgz#8d0b1fa7e7933a1e58483600ec7d9661cbaf756f"
-  integrity sha1-jQsfp+eTOh5YSDYA7H2WYcuvdW8=
-  dependencies:
-    upper-case "^1.1.0"
-
 isomorphic-fetch@^2.2.1:
   version "2.2.1"
   resolved "https://registry.yarnpkg.com/isomorphic-fetch/-/isomorphic-fetch-2.2.1.tgz#611ae1acf14f5e81f729507472819fe9733558a9"
@@ -433,17 +424,12 @@ jdenticon@^2.1.1:
   dependencies:
     canvas-renderer "~2.1.1"
 
-lower-case-first@^1.0.0:
-  version "1.0.2"
-  resolved "https://registry.yarnpkg.com/lower-case-first/-/lower-case-first-1.0.2.tgz#e5da7c26f29a7073be02d52bac9980e5922adfa1"
-  integrity sha1-5dp8JvKacHO+AtUrrJmA5ZIq36E=
+lower-case@^2.0.1:
+  version "2.0.1"
+  resolved "https://registry.yarnpkg.com/lower-case/-/lower-case-2.0.1.tgz#39eeb36e396115cc05e29422eaea9e692c9408c7"
+  integrity sha512-LiWgfDLLb1dwbFQZsSglpRj+1ctGnayXz3Uv0/WO8n558JycT5fg6zkNcnW0G68Nn0aEldTFeEfmjCfmqry/rQ==
   dependencies:
-    lower-case "^1.1.2"
-
-lower-case@^1.1.0, lower-case@^1.1.1, lower-case@^1.1.2:
-  version "1.1.4"
-  resolved "https://registry.yarnpkg.com/lower-case/-/lower-case-1.1.4.tgz#9a2cabd1b9e8e0ae993a4bf7d5875c39c42e8eac"
-  integrity sha1-miyr0bno4K6ZOkv31YdcOcQujqw=
+    tslib "^1.10.0"
 
 md5.js@^1.3.4:
   version "1.3.5"
@@ -500,12 +486,13 @@ ms@2.0.0:
   resolved "https://registry.yarnpkg.com/ms/-/ms-2.0.0.tgz#5608aeadfc00be6c2901df5f9861788de0d597c8"
   integrity sha1-VgiurfwAvmwpAd9fmGF4jeDVl8g=
 
-no-case@^2.2.0, no-case@^2.3.2:
-  version "2.3.2"
-  resolved "https://registry.yarnpkg.com/no-case/-/no-case-2.3.2.tgz#60b813396be39b3f1288a4c1ed5d1e7d28b464ac"
-  integrity sha512-rmTZ9kz+f3rCvK2TD1Ue/oZlns7OGoIWP4fc3llxxRXlOkHKoWPPWJOfFYpITabSow43QJbRIoHQXtt10VldyQ==
+no-case@^3.0.2:
+  version "3.0.2"
+  resolved "https://registry.yarnpkg.com/no-case/-/no-case-3.0.2.tgz#2b03928510318591854c0423e504d13b21234263"
+  integrity sha512-Yber3mEOA3T9+as7Z70TJUQCUPRmmq6s8NmsZX5aSB1qk+Mt+3a5JVPpnAnONUShLTkMDF4PJY3h0GKlXdRTNA==
   dependencies:
-    lower-case "^1.1.1"
+    lower-case "^2.0.1"
+    tslib "^1.10.0"
 
 node-fetch@^1.0.1:
   version "1.7.3"
@@ -527,27 +514,29 @@ oo7@^0.7.12:
   resolved "https://registry.yarnpkg.com/oo7/-/oo7-0.7.12.tgz#bd7a01ba4e815c1fcde9bea2a9a8226d06ec781e"
   integrity sha512-nVmxwLIiVCY4Aid6/+p2ujJ2mj3yh15zQ3xSl3UPui7U37DJJfD0KmuMjp+XOWH1HxTkKhIKDgR34eEhFHNxgA==
 
-param-case@^2.1.0:
-  version "2.1.1"
-  resolved "https://registry.yarnpkg.com/param-case/-/param-case-2.1.1.tgz#df94fd8cf6531ecf75e6bef9a0858fbc72be2247"
-  integrity sha1-35T9jPZTHs915r75oIWPvHK+Ikc=
+param-case@^3.0.2:
+  version "3.0.2"
+  resolved "https://registry.yarnpkg.com/param-case/-/param-case-3.0.2.tgz#2518860c89ef22add388c7293c26e48c4fe90c62"
+  integrity sha512-9UF3HbbJwzBVJlFFOvfBpWUpGFMX01q3dKavdRyv+71HI3GO4UTQIiuG51pckuqPlHzx1jmUijim8J282goaLg==
   dependencies:
-    no-case "^2.2.0"
+    dot-case "^3.0.2"
+    tslib "^1.10.0"
 
-pascal-case@^2.0.0:
-  version "2.0.1"
-  resolved "https://registry.yarnpkg.com/pascal-case/-/pascal-case-2.0.1.tgz#2d578d3455f660da65eca18ef95b4e0de912761e"
-  integrity sha1-LVeNNFX2YNpl7KGO+VtODekSdh4=
+pascal-case@^3.1.0:
+  version "3.1.0"
+  resolved "https://registry.yarnpkg.com/pascal-case/-/pascal-case-3.1.0.tgz#b3cc1273a957ceb0c37c029d2580ed59f585e4df"
+  integrity sha512-7cINxTsRAFym4dLVMdObWx2wr/FjVz8BfCdLPC069kAFLal/5dZhxObpAIM40GwZ/Xik1J37z+Nw6/TVy5fmIg==
   dependencies:
-    camel-case "^3.0.0"
-    upper-case-first "^1.1.0"
+    no-case "^3.0.2"
+    tslib "^1.10.0"
 
-path-case@^2.1.0:
-  version "2.1.1"
-  resolved "https://registry.yarnpkg.com/path-case/-/path-case-2.1.1.tgz#94b8037c372d3fe2906e465bb45e25d226e8eea5"
-  integrity sha1-lLgDfDctP+KQbkZbtF4l0ibo7qU=
+path-case@^3.0.2:
+  version "3.0.2"
+  resolved "https://registry.yarnpkg.com/path-case/-/path-case-3.0.2.tgz#ea7cf681e33e4fa5a8ec31ea91e5f02e22544ecc"
+  integrity sha512-vTXKSmzkegC4tBZTogrHleuSEhdMgtY3+vxqN0wFM8TmVs8+0xy+oh1+07SuxYzDlXl/FO8jwEtRfAQ7G+jxCg==
   dependencies:
-    no-case "^2.2.0"
+    dot-case "^3.0.2"
+    tslib "^1.10.0"
 
 path-is-absolute@^1.0.0:
   version "1.0.1"
@@ -600,13 +589,14 @@ safe-buffer@^5.0.1, safe-buffer@^5.1.0, safe-buffer@^5.1.2:
   resolved "https://registry.yarnpkg.com/safer-buffer/-/safer-buffer-2.1.2.tgz#44fa161b0187b9549dd84bb91802f9bd8385cd6a"
   integrity sha512-YZo3K82SD7Riyi0E1EQPojLz7kpepnSQI9IyPbHHg1XXXevb5dJI7tpyN2ADxGcQbHG7vcyRHk0cbwqcQriUtg==
 
-sentence-case@^2.1.0:
-  version "2.1.1"
-  resolved "https://registry.yarnpkg.com/sentence-case/-/sentence-case-2.1.1.tgz#1f6e2dda39c168bf92d13f86d4a918933f667ed4"
-  integrity sha1-H24t2jnBaL+S0T+G1KkYkz9mftQ=
+sentence-case@^3.0.2:
+  version "3.0.2"
+  resolved "https://registry.yarnpkg.com/sentence-case/-/sentence-case-3.0.2.tgz#c0274245ea0eeb9cce54268101ffbd7b98277b08"
+  integrity sha512-15UhaONq0mYjSpFHbrO2VoPjzy/3mo8nAy8/2rr32IjsUg4hCeapON4aS84YEtOL5SOccaAaopThdSPCnndFFQ==
   dependencies:
-    no-case "^2.2.0"
-    upper-case-first "^1.1.2"
+    no-case "^3.0.2"
+    tslib "^1.10.0"
+    upper-case-first "^2.0.1"
 
 sha.js@^2.4.0, sha.js@^2.4.8:
   version "2.4.11"
@@ -616,12 +606,13 @@ sha.js@^2.4.0, sha.js@^2.4.8:
     inherits "^2.0.1"
     safe-buffer "^5.0.1"
 
-snake-case@^2.1.0:
-  version "2.1.0"
-  resolved "https://registry.yarnpkg.com/snake-case/-/snake-case-2.1.0.tgz#41bdb1b73f30ec66a04d4e2cad1b76387d4d6d9f"
-  integrity sha1-Qb2xtz8w7GagTU4srRt2OH1NbZ8=
+snake-case@^3.0.2:
+  version "3.0.2"
+  resolved "https://registry.yarnpkg.com/snake-case/-/snake-case-3.0.2.tgz#2cc0eacf4edaab998f21af579b5a72b0766f91dd"
+  integrity sha512-1fRJdasXJTcsrGnUkDsnKNjHoP9NGclbIkYyY6Vv0vBVgz32rqhPFPg/Y0yIP4hwOd41Dh8rocCRHjNIuK4EZg==
   dependencies:
-    no-case "^2.2.0"
+    dot-case "^3.0.2"
+    tslib "^1.10.0"
 
 ss58@^1.0.2:
   version "1.0.2"
@@ -645,14 +636,6 @@ supports-color@^5.3.0:
   dependencies:
     has-flag "^3.0.0"
 
-swap-case@^1.1.0:
-  version "1.1.2"
-  resolved "https://registry.yarnpkg.com/swap-case/-/swap-case-1.1.2.tgz#c39203a4587385fad3c850a0bd1bcafa081974e3"
-  integrity sha1-w5IDpFhzhfrTyFCgvRvK+ggZdOM=
-  dependencies:
-    lower-case "^1.1.1"
-    upper-case "^1.1.1"
-
 text-encoding-polyfill@^0.6.7:
   version "0.6.7"
   resolved "https://registry.yarnpkg.com/text-encoding-polyfill/-/text-encoding-polyfill-0.6.7.tgz#4d27de0153e4c86eb2631ffd74c2f3f57969a9ec"
@@ -663,13 +646,10 @@ text-encoding@^0.7.0:
   resolved "https://registry.yarnpkg.com/text-encoding/-/text-encoding-0.7.0.tgz#f895e836e45990624086601798ea98e8f36ee643"
   integrity sha512-oJQ3f1hrOnbRLOcwKz0Liq2IcrvDeZRHXhd9RgLrsT+DjWY/nty1Hi7v3dtkaEYbPYe0mUoOfzRrMwfXXwgPUA==
 
-title-case@^2.1.0:
-  version "2.1.1"
-  resolved "https://registry.yarnpkg.com/title-case/-/title-case-2.1.1.tgz#3e127216da58d2bc5becf137ab91dae3a7cd8faa"
-  integrity sha1-PhJyFtpY0rxb7PE3q5Ha46fNj6o=
-  dependencies:
-    no-case "^2.2.0"
-    upper-case "^1.0.3"
+tslib@^1.10.0:
+  version "1.10.0"
+  resolved "https://registry.yarnpkg.com/tslib/-/tslib-1.10.0.tgz#c3c19f95973fb0a62973fb09d90d961ee43e5c8a"
+  integrity sha512-qOebF53frne81cf0S9B41ByenJ3/IuH8yJKngAX35CmiZySA0khhkovshKK+jGCaMnVomla7gVlIcc3EvKPbTQ==
 
 tweetnacl@^1.0.0:
   version "1.0.1"
@@ -686,17 +666,19 @@ unorm@^1.3.3:
   resolved "https://registry.yarnpkg.com/unorm/-/unorm-1.4.1.tgz#364200d5f13646ca8bcd44490271335614792300"
   integrity sha1-NkIA1fE2RsqLzURJAnEzVhR5IwA=
 
-upper-case-first@^1.1.0, upper-case-first@^1.1.2:
-  version "1.1.2"
-  resolved "https://registry.yarnpkg.com/upper-case-first/-/upper-case-first-1.1.2.tgz#5d79bedcff14419518fd2edb0a0507c9b6859115"
-  integrity sha1-XXm+3P8UQZUY/S7bCgUHybaFkRU=
+upper-case-first@^2.0.1:
+  version "2.0.1"
+  resolved "https://registry.yarnpkg.com/upper-case-first/-/upper-case-first-2.0.1.tgz#32ab436747d891cc20ab1e43d601cb4d0a7fbf4a"
+  integrity sha512-105J8XqQ+9RxW3l9gHZtgve5oaiR9TIwvmZAMAIZWRHe00T21cdvewKORTlOJf/zXW6VukuTshM+HXZNWz7N5w==
   dependencies:
-    upper-case "^1.1.1"
+    tslib "^1.10.0"
 
-upper-case@^1.0.3, upper-case@^1.1.0, upper-case@^1.1.1, upper-case@^1.1.3:
-  version "1.1.3"
-  resolved "https://registry.yarnpkg.com/upper-case/-/upper-case-1.1.3.tgz#f6b4501c2ec4cdd26ba78be7222961de77621598"
-  integrity sha1-9rRQHC7EzdJrp4vnIilh3ndiFZg=
+upper-case@^2.0.1:
+  version "2.0.1"
+  resolved "https://registry.yarnpkg.com/upper-case/-/upper-case-2.0.1.tgz#6214d05e235dc817822464ccbae85822b3d8665f"
+  integrity sha512-laAsbea9SY5osxrv7S99vH9xAaJKrw5Qpdh4ENRLcaxipjKsiaBwiAsxfa8X5mObKNTQPsupSq0J/VIxsSJe3A==
+  dependencies:
+    tslib "^1.10.0"
 
 whatwg-fetch@>=0.10.0:
   version "3.0.0"