diff --git a/yarn.lock b/yarn.lock
index 8a33631..334cd3e 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -908,11 +908,6 @@ cliui@^5.0.0:
     strip-ansi "^5.2.0"
     wrap-ansi "^5.1.0"
 
-co@^4.6.0:
-  version "4.6.0"
-  resolved "https://registry.yarnpkg.com/co/-/co-4.6.0.tgz#6ea6bdf3d853ae54ccb8e47bfa0bf3f9031fb184"
-  integrity sha1-bqa989hTrlTMuOR7+gvz+QMfsYQ=
-
 coffeescript@2:
   version "2.5.1"
   resolved "https://registry.yarnpkg.com/coffeescript/-/coffeescript-2.5.1.tgz#b2442a1f2c806139669534a54adc35010559d16a"
@@ -1728,9 +1723,9 @@ lodash.memoize@~3.0.3:
   integrity sha1-LcvSwofLwKVcxCMovQxzYVDVPj8=
 
 lodash@^4.17.15, lodash@^4.17.4:
-  version "4.17.19"
-  resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.19.tgz#e48ddedbe30b3321783c5b4301fbd353bc1e4a4b"
-  integrity sha512-JNvd8XER9GQX0v2qJgsaN/mzFCNA5BRe/j8JN9d+tWyGLSodKQHKFicdwNYzWwI3wjRnaKPsGj1XkBjx/F96DQ==
+  version "4.17.21"
+  resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.21.tgz#679591c564c3bffaae8454cf0b3df370c3d6911c"
+  integrity sha512-v2kDEe57lecTulaDIuNTPy3Ry4gLGJ6Z1O3vE1krgXZNrsQ+LFTGHVxVjcXPs17LhbZVGedAJv8XZ1tvj5FvSg==
 
 log-symbols@3.0.0:
   version "3.0.0"