diff --git a/yarn.lock b/yarn.lock
index 156d1b6b..6d346e1f 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1753,8 +1753,8 @@ ecc-jsbn@~0.1.1:
     jsbn "~0.1.0"
 
 ecstatic@^2.0.0:
-  version "2.2.1"
-  resolved "https://registry.yarnpkg.com/ecstatic/-/ecstatic-2.2.1.tgz#b5087fad439dd9dd49d31e18131454817fe87769"
+  version "2.2.2"
+  resolved "https://registry.yarnpkg.com/ecstatic/-/ecstatic-2.2.2.tgz#1c7969b7a8893a04852e9373edeeb1d62809d393"
   dependencies:
     he "^1.1.1"
     mime "^1.2.11"
@@ -2662,8 +2662,8 @@ hawk@~3.1.3:
     sntp "1.x.x"
 
 he@^1.1.1:
-  version "1.1.1"
-  resolved "https://registry.yarnpkg.com/he/-/he-1.1.1.tgz#93410fd21b009735151f8868c2f271f3427e23fd"
+  version "1.2.0"
+  resolved "https://registry.yarnpkg.com/he/-/he-1.2.0.tgz#84ae65fa7eafb165fddb61566ae14baf05664f0f"
 
 hmac-drbg@^1.0.0:
   version "1.0.1"
@@ -3674,8 +3674,8 @@ mime-types@~1.0.1:
   resolved "https://registry.yarnpkg.com/mime-types/-/mime-types-1.0.2.tgz#995ae1392ab8affcbfcb2641dd054e943c0d5dce"
 
 mime@^1.2.11, mime@^1.3.4:
-  version "1.3.6"
-  resolved "https://registry.yarnpkg.com/mime/-/mime-1.3.6.tgz#591d84d3653a6b0b4a3b9df8de5aa8108e72e5e0"
+  version "1.6.0"
+  resolved "https://registry.yarnpkg.com/mime/-/mime-1.6.0.tgz#32cd9e5c64553bd58d19a568af452acff04981b1"
 
 mime@~1.2.11:
   version "1.2.11"
@@ -4198,6 +4198,10 @@ preserve@^0.2.0:
   version "0.2.0"
   resolved "https://registry.yarnpkg.com/preserve/-/preserve-0.2.0.tgz#815ed1f6ebc65926f865b310c0713bcb3315ce4b"
 
+prettier@^1.11.1:
+  version "1.18.2"
+  resolved "https://registry.yarnpkg.com/prettier/-/prettier-1.18.2.tgz#6823e7c5900017b4bd3acf46fe9ac4b4d7bda9ea"
+
 private@^0.1.6:
   version "0.1.7"
   resolved "https://registry.yarnpkg.com/private/-/private-0.1.7.tgz#68ce5e8a1ef0a23bb570cc28537b5332aba63ef1"
@@ -5342,8 +5346,8 @@ unpipe@1.0.0, unpipe@~1.0.0:
   resolved "https://registry.yarnpkg.com/unpipe/-/unpipe-1.0.0.tgz#b2bf4ee8514aae6165b4817829d21b2ef49904ec"
 
 url-join@^2.0.2:
-  version "2.0.2"
-  resolved "https://registry.yarnpkg.com/url-join/-/url-join-2.0.2.tgz#c072756967ad24b8b59e5741551caac78f50b8b7"
+  version "2.0.5"
+  resolved "https://registry.yarnpkg.com/url-join/-/url-join-2.0.5.tgz#5af22f18c052a000a48d7b82c5e9c2e2feeda728"
 
 url@^0.11.0:
   version "0.11.0"