diff --git a/yarn.lock b/yarn.lock
index 5ca83eb..310d248 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1819,10 +1819,14 @@ bser@2.1.1:
   dependencies:
     node-int64 "^0.4.0"
 
-buffer-from@1.x, buffer-from@^1.0.0:
+buffer-from@1.x:
   version "1.1.1"
   resolved "https://registry.yarnpkg.com/buffer-from/-/buffer-from-1.1.1.tgz#32713bc028f75c02fdb710d7c7bcec1f2c6070ef"
 
+buffer-from@^1.0.0:
+  version "1.1.2"
+  resolved "https://registry.yarnpkg.com/buffer-from/-/buffer-from-1.1.2.tgz#2b146a6fd72e80b4f55d255f35ed59a3a9a41bd5"
+
 buffer-json@^2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/buffer-json/-/buffer-json-2.0.0.tgz#f73e13b1e42f196fe2fd67d001c7d7107edd7c23"
@@ -3223,10 +3227,6 @@ flatten@^1.0.2:
   version "1.0.3"
   resolved "https://registry.yarnpkg.com/flatten/-/flatten-1.0.3.tgz#c1283ac9f27b368abc1e36d1ff7b04501a30356b"
 
-flush-promises@^1.0.2:
-  version "1.0.2"
-  resolved "https://registry.yarnpkg.com/flush-promises/-/flush-promises-1.0.2.tgz#4948fd58f15281fed79cbafc86293d5bb09b2ced"
-
 flush-write-stream@^1.0.0:
   version "1.1.1"
   resolved "https://registry.yarnpkg.com/flush-write-stream/-/flush-write-stream-1.1.1.tgz#8dd7d873a1babc207d94ead0c2e0e44276ebf2e8"
@@ -6662,8 +6662,8 @@ source-map-resolve@^0.5.0, source-map-resolve@^0.5.2:
     urix "^0.1.0"
 
 source-map-support@^0.5.6, source-map-support@~0.5.12:
-  version "0.5.16"
-  resolved "https://registry.yarnpkg.com/source-map-support/-/source-map-support-0.5.16.tgz#0ae069e7fe3ba7538c64c98515e35339eac5a042"
+  version "0.5.21"
+  resolved "https://registry.yarnpkg.com/source-map-support/-/source-map-support-0.5.21.tgz#04fe7c7f9e1ed2d662233c28cb2b35b9f63f6e4f"
   dependencies:
     buffer-from "^1.0.0"
     source-map "^0.6.0"
@@ -7005,8 +7005,8 @@ terser-webpack-plugin@^2.3.0:
     webpack-sources "^1.4.3"
 
 terser@^4.1.2, terser@^4.4.3:
-  version "4.4.3"
-  resolved "https://registry.yarnpkg.com/terser/-/terser-4.4.3.tgz#401abc52b88869cf904412503b1eb7da093ae2f0"
+  version "4.8.1"
+  resolved "https://registry.yarnpkg.com/terser/-/terser-4.8.1.tgz#a00e5634562de2239fd404c649051bf6fc21144f"
   dependencies:
     commander "^2.20.0"
     source-map "~0.6.1"