diff --git a/yarn.lock b/yarn.lock
index 60e44e732f2..4530bc8f8ed 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -7248,10 +7248,10 @@ mkdirp@^1.0.4:
   resolved "https://registry.yarnpkg.com/mkdirp/-/mkdirp-1.0.4.tgz#3eb5ed62622756d79a5f0e2a221dfebad75c2f7e"
   integrity sha512-vVqVZQyf3WLx2Shd0qJ9xuvqgAyKPLAiqITEtqW0oIUjzo3PePDd6fW9iFz30ef7Ysp/oiWqbhszeGWW2T6Gzw==
 
-moo@^0.4.3:
-  version "0.4.3"
-  resolved "https://registry.yarnpkg.com/moo/-/moo-0.4.3.tgz#3f847a26f31cf625a956a87f2b10fbc013bfd10e"
-  integrity sha512-gFD2xGCl8YFgGHsqJ9NKRVdwlioeW3mI1iqfLNYQOv0+6JRwG58Zk9DIGQgyIaffSYaO1xsKnMaYzzNr1KyIAw==
+moo@^0.5.0:
+  version "0.5.1"
+  resolved "https://registry.yarnpkg.com/moo/-/moo-0.5.1.tgz#7aae7f384b9b09f620b6abf6f74ebbcd1b65dbc4"
+  integrity sha512-I1mnb5xn4fO80BH9BLcF0yLypy2UKl+Cb01Fu0hJRkJjlCRtxZMWkTdAtDd5ZqCOxtCkhmRwyI57vWT+1iZ67w==
 
 mousetrap@^1.5.2:
   version "1.6.5"
@@ -7336,12 +7336,12 @@ natural-compare@^1.4.0:
   integrity sha1-Sr6/7tdUHywnrPspvbvRXI1bpPc=
 
 nearley@^2.7.10:
-  version "2.16.0"
-  resolved "https://registry.yarnpkg.com/nearley/-/nearley-2.16.0.tgz#77c297d041941d268290ec84b739d0ee297e83a7"
-  integrity sha512-Tr9XD3Vt/EujXbZBv6UAHYoLUSMQAxSsTnm9K3koXzjzNWY195NqALeyrzLZBKzAkL3gl92BcSogqrHjD8QuUg==
+  version "2.19.2"
+  resolved "https://registry.yarnpkg.com/nearley/-/nearley-2.19.2.tgz#40cafbf235121ae94b1aa1e585890d24fade182d"
+  integrity sha512-h6lygT0BWAGErDvoE2LfI+tDeY2+UUrqG5dcBPdCmjnjud9z1wE0P7ljb85iNbE93YA+xJLpoSYGMuUqhnSSSA==
   dependencies:
     commander "^2.19.0"
-    moo "^0.4.3"
+    moo "^0.5.0"
     railroad-diagrams "^1.0.0"
     randexp "0.4.6"
     semver "^5.4.1"