diff --git a/yarn.lock b/yarn.lock
index 35fd99f..40f98f1 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -2868,9 +2868,9 @@ immutable@^3.8.1:
   version "3.8.1"
   resolved "https://registry.yarnpkg.com/immutable/-/immutable-3.8.1.tgz#200807f11ab0f72710ea485542de088075f68cd2"
 
-immutable@v4.0.0-rc.2:
-  version "4.0.0-rc.2"
-  resolved "https://registry.yarnpkg.com/immutable/-/immutable-4.0.0-rc.2.tgz#fdd0948aae728fda2306a02f72bb73e1773432d1"
+immutable@^3.8.2:
+  version "3.8.2"
+  resolved "https://registry.yarnpkg.com/immutable/-/immutable-3.8.2.tgz#c2439951455bb39913daf281376f1530e104adf3"
 
 imurmurhash@^0.1.4:
   version "0.1.4"
@@ -3746,8 +3746,8 @@ lodash.memoize@^4.1.2:
   resolved "https://registry.yarnpkg.com/lodash.memoize/-/lodash.memoize-4.1.2.tgz#bcc6c49a42a2840ed997f323eada5ecd182e0bfe"
 
 lodash.merge@^4.4.0:
-  version "4.6.0"
-  resolved "https://registry.yarnpkg.com/lodash.merge/-/lodash.merge-4.6.0.tgz#69884ba144ac33fe699737a6086deffadd0f89c5"
+  version "4.6.2"
+  resolved "https://registry.yarnpkg.com/lodash.merge/-/lodash.merge-4.6.2.tgz#558aa53b43b661e1925a0afdfa36a9a1085fe57a"
 
 lodash.pick@^4.2.0, lodash.pick@^4.2.1, lodash.pick@^4.4.0:
   version "4.4.0"
@@ -3923,10 +3923,6 @@ mobx@^2.3.4:
   version "2.7.0"
   resolved "https://registry.yarnpkg.com/mobx/-/mobx-2.7.0.tgz#cf3d82d18c0ca7f458d8f2a240817b3dc7e54a01"
 
-moment@^2.18.1:
-  version "2.18.1"
-  resolved "https://registry.yarnpkg.com/moment/-/moment-2.18.1.tgz#c36193dd3ce1c2eed2adb7c802dbbc77a81b1c0f"
-
 ms@2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/ms/-/ms-2.0.0.tgz#5608aeadfc00be6c2901df5f9861788de0d597c8"