diff --git a/2019-08-11-weather-api/weather-app/yarn.lock b/2019-08-11-weather-api/weather-app/yarn.lock
index 581b313..e57a8a3 100644
--- a/2019-08-11-weather-api/weather-app/yarn.lock
+++ b/2019-08-11-weather-api/weather-app/yarn.lock
@@ -1320,14 +1320,10 @@ acorn-walk@^6.0.1:
   resolved "https://registry.yarnpkg.com/acorn-walk/-/acorn-walk-6.1.1.tgz#d363b66f5fac5f018ff9c3a1e7b6f8e310cc3913"
 
 acorn@^5.5.3:
-  version "5.7.3"
-  resolved "https://registry.yarnpkg.com/acorn/-/acorn-5.7.3.tgz#67aa231bf8812974b85235a96771eb6bd07ea279"
+  version "5.7.4"
+  resolved "https://registry.yarnpkg.com/acorn/-/acorn-5.7.4.tgz#3e8d8a9947d0599a1796d10225d7432f4a4acf5e"
 
-acorn@^6.0.1, acorn@^6.0.4, acorn@^6.0.7:
-  version "6.1.1"
-  resolved "https://registry.yarnpkg.com/acorn/-/acorn-6.1.1.tgz#7d25ae05bb8ad1f9b699108e1094ecd7884adc1f"
-
-acorn@^6.2.1:
+acorn@^6.0.1, acorn@^6.0.4, acorn@^6.0.7, acorn@^6.2.1:
   version "6.2.1"
   resolved "https://registry.yarnpkg.com/acorn/-/acorn-6.2.1.tgz#3ed8422d6dec09e6121cc7a843ca86a330a86b51"