diff --git a/yarn.lock b/yarn.lock
index 0e59cf4..e8ff903 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1092,8 +1092,9 @@ acorn-jsx@^5.0.0:
   integrity sha512-HJ7CfNHrfJLlNTzIEUTj43LNWGkqpRLxm3YjAlcD0ACydk9XynzYsCBHxut+iqt+1aBXkx9UP/w/ZqMr13XIzg==
 
 acorn@^5.0.0, acorn@^5.5.3:
-  version "5.7.2"
-  resolved "https://registry.yarnpkg.com/acorn/-/acorn-5.7.2.tgz#91fa871883485d06708800318404e72bfb26dcc5"
+  version "5.7.4"
+  resolved "https://registry.yarnpkg.com/acorn/-/acorn-5.7.4.tgz#3e8d8a9947d0599a1796d10225d7432f4a4acf5e"
+  integrity sha512-1D++VG7BhrtvQpNbBzovKNc1FLGGEE/oGe7b9xJm/RFHMBeUaUGpluV9RLjZa47YFdPcDAenEYuq9pQPcMdLJg==
 
 acorn@^6.0.7:
   version "6.1.1"
@@ -4881,7 +4882,7 @@ pretty-error@^2.0.2:
 
 pretty-format@^22.4.3:
   version "22.4.3"
-  resolved "http://registry.npmjs.org/pretty-format/-/pretty-format-22.4.3.tgz#f873d780839a9c02e9664c8a082e9ee79eaac16f"
+  resolved "https://registry.npmjs.org/pretty-format/-/pretty-format-22.4.3.tgz#f873d780839a9c02e9664c8a082e9ee79eaac16f"
   dependencies:
     ansi-regex "^3.0.0"
     ansi-styles "^3.2.0"