diff --git a/challenger/yarn.lock b/challenger/yarn.lock
index 82020a25..c0aee2b9 100644
--- a/challenger/yarn.lock
+++ b/challenger/yarn.lock
@@ -1159,12 +1159,14 @@ browserify-zlib@^0.2.0:
     pako "~1.0.5"
 
 browserslist@^4.0.0, browserslist@^4.1.0, browserslist@^4.3.4, browserslist@^4.6.0, browserslist@^4.6.2:
-  version "4.6.4"
-  resolved "https://registry.yarnpkg.com/browserslist/-/browserslist-4.6.4.tgz#fd0638b3f8867fec2c604ed0ed9300379f8ec7c2"
+  version "4.16.6"
+  resolved "https://registry.yarnpkg.com/browserslist/-/browserslist-4.16.6.tgz#d7901277a5a88e554ed305b183ec9b0c08f66fa2"
   dependencies:
-    caniuse-lite "^1.0.30000981"
-    electron-to-chromium "^1.3.188"
-    node-releases "^1.1.25"
+    caniuse-lite "^1.0.30001219"
+    colorette "^1.2.2"
+    electron-to-chromium "^1.3.723"
+    escalade "^3.1.1"
+    node-releases "^1.1.71"
 
 buffer-equal@0.0.1:
   version "0.0.1"
@@ -1233,9 +1235,9 @@ caniuse-api@^3.0.0:
     lodash.memoize "^4.1.2"
     lodash.uniq "^4.5.0"
 
-caniuse-lite@^1.0.0, caniuse-lite@^1.0.30000981:
-  version "1.0.30000983"
-  resolved "https://registry.yarnpkg.com/caniuse-lite/-/caniuse-lite-1.0.30000983.tgz#ab3c70061ca2a3467182a10ac75109b199b647f8"
+caniuse-lite@^1.0.0, caniuse-lite@^1.0.30001219:
+  version "1.0.30001228"
+  resolved "https://registry.yarnpkg.com/caniuse-lite/-/caniuse-lite-1.0.30001228.tgz#bfdc5942cd3326fa51ee0b42fbef4da9d492a7fa"
 
 caseless@~0.12.0:
   version "0.12.0"
@@ -1372,6 +1374,10 @@ color@^3.0.0:
     color-convert "^1.9.1"
     color-string "^1.5.2"
 
+colorette@^1.2.2:
+  version "1.2.2"
+  resolved "https://registry.yarnpkg.com/colorette/-/colorette-1.2.2.tgz#cbcc79d5e99caea2dbf10eb3a26fd8b3e6acfa94"
+
 combined-stream@^1.0.6, combined-stream@~1.0.6:
   version "1.0.8"
   resolved "https://registry.yarnpkg.com/combined-stream/-/combined-stream-1.0.8.tgz#c3d45a8b34fd730631a110a8a2520682b31d5a7f"
@@ -1881,9 +1887,9 @@ ee-first@1.1.1:
   version "1.1.1"
   resolved "https://registry.yarnpkg.com/ee-first/-/ee-first-1.1.1.tgz#590c61156b0ae2f4f0255732a158b266bc56b21d"
 
-electron-to-chromium@^1.3.188:
-  version "1.3.188"
-  resolved "https://registry.yarnpkg.com/electron-to-chromium/-/electron-to-chromium-1.3.188.tgz#e28e1afe4bb229989e280bfd3b395c7ec03c8b7a"
+electron-to-chromium@^1.3.723:
+  version "1.3.738"
+  resolved "https://registry.yarnpkg.com/electron-to-chromium/-/electron-to-chromium-1.3.738.tgz#aec24b091c82acbfabbdcce08076a703941d17ca"
 
 elliptic@6.3.3:
   version "6.3.3"
@@ -1945,6 +1951,10 @@ es-to-primitive@^1.2.0:
     is-date-object "^1.0.1"
     is-symbol "^1.0.2"
 
+escalade@^3.1.1:
+  version "3.1.1"
+  resolved "https://registry.yarnpkg.com/escalade/-/escalade-3.1.1.tgz#d8cfdc7000965c5a0174b4a82eaa5c0552742e40"
+
 escape-html@~1.0.3:
   version "1.0.3"
   resolved "https://registry.yarnpkg.com/escape-html/-/escape-html-1.0.3.tgz#0258eae4d3d0c0974de1c169188ef0051d1d1988"
@@ -3264,11 +3274,9 @@ node-pre-gyp@^0.12.0:
     semver "^5.3.0"
     tar "^4"
 
-node-releases@^1.1.25:
-  version "1.1.25"
-  resolved "https://registry.yarnpkg.com/node-releases/-/node-releases-1.1.25.tgz#0c2d7dbc7fed30fbe02a9ee3007b8c90bf0133d3"
-  dependencies:
-    semver "^5.3.0"
+node-releases@^1.1.71:
+  version "1.1.72"
+  resolved "https://registry.yarnpkg.com/node-releases/-/node-releases-1.1.72.tgz#14802ab6b1039a79a0c7d662b610a5bbd76eacbe"
 
 nopt@^4.0.1, nopt@~4.0.1:
   version "4.0.1"