diff --git a/package.json b/package.json
index aab5af1..d7b843e 100644
--- a/package.json
+++ b/package.json
@@ -22,7 +22,7 @@
   "license": "MIT",
   "devDependencies": {
     "@istanbuljs/nyc-config-typescript": "1.0.1",
-    "@microsoft/api-documenter": "7.8.19",
+    "@microsoft/api-documenter": "7.8.21",
     "@microsoft/api-extractor": "7.9.1",
     "@types/chai": "4.2.11",
     "@types/chai-as-promised": "7.1.2",
diff --git a/yarn.lock b/yarn.lock
index 584b1a4..735d4db 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -159,27 +159,19 @@
   resolved "https://artifacts.apextoaster.com/repository/group-npm/@istanbuljs/schema/-/schema-0.1.2.tgz#26520bf09abe4a5644cd5414e37125a8954241dd"
   integrity sha512-tsAQNx32a8CoFhjhijUIhI4kccIAgmGhy8LZMZgGfmXcpMbPRUqn5LWmgRttILi6yeGmBJd2xsPkFMs0PzgPCw==
 
-"@microsoft/api-documenter@7.8.19":
-  version "7.8.19"
-  resolved "https://artifacts.apextoaster.com/repository/group-npm/@microsoft/api-documenter/-/api-documenter-7.8.19.tgz#8a0356184c0f4400a211032a5f5c203f2b13ba1c"
-  integrity sha512-pod7Fy/ItMgJFTdq9o4/YPxl5n2wF+oQCjuRgYG6rAhS+tC/EmW/AwnqZxfLi6Fe8ePNBgUHY/ko6Qlnydx05w==
+"@microsoft/api-documenter@7.8.21":
+  version "7.8.21"
+  resolved "https://artifacts.apextoaster.com/repository/group-npm/@microsoft/api-documenter/-/api-documenter-7.8.21.tgz#96dba0c1b6b7db9c1acae9dd1e32e801cdecb853"
+  integrity sha512-ffrJEVNykhSVJL8W/fX95GOF8LsG1BjVjp1exGVdmKltrmpDAlFL6WVs24ii1WUY62lcIjMqgBK4F9DszFZ5UQ==
   dependencies:
-    "@microsoft/api-extractor-model" "7.8.11"
+    "@microsoft/api-extractor-model" "7.8.12"
     "@microsoft/tsdoc" "0.12.19"
-    "@rushstack/node-core-library" "3.24.4"
-    "@rushstack/ts-command-line" "4.4.5"
+    "@rushstack/node-core-library" "3.25.0"
+    "@rushstack/ts-command-line" "4.4.6"
     colors "~1.2.1"
     js-yaml "~3.13.1"
     resolve "~1.17.0"
 
-"@microsoft/api-extractor-model@7.8.11":
-  version "7.8.11"
-  resolved "https://artifacts.apextoaster.com/repository/group-npm/@microsoft/api-extractor-model/-/api-extractor-model-7.8.11.tgz#641664307584f4c8dbd38b3cf3cd618b7a092643"
-  integrity sha512-1bqqmmOz18z6fWmFUEEteFl4obK21/2gj0rqLxN7AFijrvKfZ6p6zKB6FkBBp2hJbIfSdf3Kr6RGFG5vifvW+w==
-  dependencies:
-    "@microsoft/tsdoc" "0.12.19"
-    "@rushstack/node-core-library" "3.24.4"
-
 "@microsoft/api-extractor-model@7.8.12":
   version "7.8.12"
   resolved "https://artifacts.apextoaster.com/repository/group-npm/@microsoft/api-extractor-model/-/api-extractor-model-7.8.12.tgz#d089193ef29275b8b20802498c6bdfab80dcef59"
@@ -223,19 +215,6 @@
   dependencies:
     estree-walker "^1.0.1"
 
-"@rushstack/node-core-library@3.24.4":
-  version "3.24.4"
-  resolved "https://artifacts.apextoaster.com/repository/group-npm/@rushstack/node-core-library/-/node-core-library-3.24.4.tgz#0ec278329e1b0db7d9eda077583f41c37722daf7"
-  integrity sha512-h8XQjpI78o5Mq7mJKX/rSfV9R02CJXBzxgqQ4EnptUP1StZ/BvyzwAp5VHvvNoJKXlFgqJwwOt8TE4d7bHGLgg==
-  dependencies:
-    "@types/node" "10.17.13"
-    colors "~1.2.1"
-    fs-extra "~7.0.1"
-    jju "~1.4.0"
-    semver "~5.3.0"
-    timsort "~0.3.0"
-    z-schema "~3.18.3"
-
 "@rushstack/node-core-library@3.25.0":
   version "3.25.0"
   resolved "https://artifacts.apextoaster.com/repository/group-npm/@rushstack/node-core-library/-/node-core-library-3.25.0.tgz#ba40bc1b188ab5d31f5705999cd2b3b56b8a32cf"
@@ -249,15 +228,6 @@
     timsort "~0.3.0"
     z-schema "~3.18.3"
 
-"@rushstack/ts-command-line@4.4.5":
-  version "4.4.5"
-  resolved "https://artifacts.apextoaster.com/repository/group-npm/@rushstack/ts-command-line/-/ts-command-line-4.4.5.tgz#924a810177a821571297925dfdd04563d28fe2ab"
-  integrity sha512-UyqdvegMvtMCAbHbrNKkWNVvcRRtQ9t47GuXlWO9PsSa33FUkIBbYmjyC53bl4mS9Zhr3YaCLN+oi9VlUtQxSg==
-  dependencies:
-    "@types/argparse" "1.0.38"
-    argparse "~1.0.9"
-    colors "~1.2.1"
-
 "@rushstack/ts-command-line@4.4.6":
   version "4.4.6"
   resolved "https://artifacts.apextoaster.com/repository/group-npm/@rushstack/ts-command-line/-/ts-command-line-4.4.6.tgz#7818f19e444274e68564a756ef62a2b4e0ced0f8"
@@ -4230,11 +4200,6 @@ semver@~2.3.1:
   resolved "https://artifacts.apextoaster.com/repository/group-npm/semver/-/semver-2.3.2.tgz#b9848f25d6cf36333073ec9ef8856d42f1233e52"
   integrity sha1-uYSPJdbPNjMwc+ye+IVtQvEjPlI=
 
-semver@~5.3.0:
-  version "5.3.0"
-  resolved "https://artifacts.apextoaster.com/repository/group-npm/semver/-/semver-5.3.0.tgz#9b2ce5d3de02d17c6012ad326aa6b4d0cf54f94f"
-  integrity sha1-myzl094C0XxgEq0yaqa00M9U+U8=
-
 serialize-javascript@3.0.0:
   version "3.0.0"
   resolved "https://artifacts.apextoaster.com/repository/group-npm/serialize-javascript/-/serialize-javascript-3.0.0.tgz#492e489a2d77b7b804ad391a5f5d97870952548e"