diff --git a/yarn.lock b/yarn.lock
index 60f038d..6d1e5ca 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -805,7 +805,7 @@
   resolved "https://registry.yarnpkg.com/@nyancss/types/-/types-1.1.0.tgz#1b6030a6ee7143a0ba2e556bff72d9da7bb13ef6"
   integrity sha512-iiC7HUmil5T3pLcRDP+9Iza0WbN9ZXD9t5UGvwscf8PC97JJyXQe1tS5fea3DskEB8mxUUh/J8A14LMyvX71kw==
 
-"@nyancss/utils@^1.2.0":
+"@nyancss/utils@^1.2":
   version "1.2.0"
   resolved "https://registry.yarnpkg.com/@nyancss/utils/-/utils-1.2.0.tgz#c753bf08cde34fb08bc963b46b0625f19ffe93a0"
   integrity sha512-9QWCpjZGo5GupaS+6C6VfYscaZo2PGsr8SWs+/B7ryrA6ztSAYE3EOVvTQIdxYC23ccZzsfIlM2tqcchUMOq+A==
@@ -916,9 +916,9 @@ acorn-walk@^6.0.1:
   integrity sha512-OtUw6JUTgxA2QoqqmrmQ7F2NYqiBPi/L2jqHyFtllhOUvXYQXf0Z1CYUinIfyT4bTCGmrA7gX9FvHA81uzCoVw==
 
 acorn@^5.5.3:
-  version "5.7.3"
-  resolved "https://registry.yarnpkg.com/acorn/-/acorn-5.7.3.tgz#67aa231bf8812974b85235a96771eb6bd07ea279"
-  integrity sha512-T/zvzYRfbVojPWahDsE5evJdHb3oJoQfFbsrKM7w5Zcs++Tr257tia3BmMP8XYVjp1S9RZXQMh7gao96BlqZOw==
+  version "5.7.4"
+  resolved "https://registry.yarnpkg.com/acorn/-/acorn-5.7.4.tgz#3e8d8a9947d0599a1796d10225d7432f4a4acf5e"
+  integrity sha512-1D++VG7BhrtvQpNbBzovKNc1FLGGEE/oGe7b9xJm/RFHMBeUaUGpluV9RLjZa47YFdPcDAenEYuq9pQPcMdLJg==
 
 acorn@^6.0.1:
   version "6.1.1"