diff --git a/yarn.lock b/yarn.lock
index 0bb89bc..249eba7 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -238,9 +238,9 @@ acorn-node@^1.2.0, acorn-node@^1.3.0, acorn-node@^1.5.2:
     xtend "^4.0.1"
 
 acorn@^5.0.0, acorn@^5.7.1:
-  version "5.7.1"
-  resolved "https://registry.yarnpkg.com/acorn/-/acorn-5.7.1.tgz#f095829297706a7c9776958c0afc8930a9b9d9d8"
-  integrity sha512-d+nbxBUGKg7Arpsvbnlq61mc12ek3EY8EQldM3GPAhWJ1UVxC6TDGbIvUMNU6obBX3i1+ptCIzV4vq0gFPEGVQ==
+  version "5.7.4"
+  resolved "https://registry.yarnpkg.com/acorn/-/acorn-5.7.4.tgz#3e8d8a9947d0599a1796d10225d7432f4a4acf5e"
+  integrity sha512-1D++VG7BhrtvQpNbBzovKNc1FLGGEE/oGe7b9xJm/RFHMBeUaUGpluV9RLjZa47YFdPcDAenEYuq9pQPcMdLJg==
 
 ajv@^5.1.0:
   version "5.5.2"