diff --git a/package.json b/package.json
index 94d4c54b..ae6eabd2 100644
--- a/package.json
+++ b/package.json
@@ -23,7 +23,7 @@
   "dependencies": {
     "clipboard": "^1.6.1",
     "flexboxgrid-sass": "^8.0.5",
-    "lodash": "^4.16.2",
+    "lodash": "^4.17.21",
     "moment": "^2.17.1",
     "moment-jalaali": "^0.4.0",
     "nchan": "^1.0.5",
diff --git a/yarn.lock b/yarn.lock
index 7c3f7cfa..22f444aa 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -4480,17 +4480,9 @@ lodash@^3.10.1:
   version "3.10.1"
   resolved "https://registry.yarnpkg.com/lodash/-/lodash-3.10.1.tgz#5bf45e8e49ba4189e17d482789dfd15bd140b7b6"
 
-lodash@^4:
-  version "4.17.10"
-  resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.10.tgz#1b7793cf7259ea38fb3661d4d38b3260af8ae4e7"
-
-lodash@^4.0.0, lodash@^4.13.1, lodash@^4.14.0, lodash@^4.16.2, lodash@^4.17.2, lodash@~4.17.4:
-  version "4.17.4"
-  resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.4.tgz#78203a4d1c328ae1d86dca6460e369b57f4055ae"
-
-lodash@^4.17.4:
-  version "4.17.15"
-  resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.15.tgz#b447f6670a0455bbfeedd11392eff330ea097548"
+lodash@^4, lodash@^4.0.0, lodash@^4.13.1, lodash@^4.14.0, lodash@^4.17.2, lodash@^4.17.21, lodash@^4.17.4, lodash@~4.17.4:
+  version "4.17.21"
+  resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.21.tgz#679591c564c3bffaae8454cf0b3df370c3d6911c"
 
 logalot@^2.0.0:
   version "2.1.0"