diff --git a/package.json b/package.json
index 132dfd8..f74d17a 100644
--- a/package.json
+++ b/package.json
@@ -19,7 +19,7 @@
   ],
   "devDependencies": {
     "@types/pegjs": "^0.10.1",
-    "rollup": "^1.15.6",
+    "rollup": "^1.31.1",
     "rollup-plugin-commonjs": "^10.0.0",
     "rollup-plugin-node-resolve": "^5.0.4",
     "rollup-plugin-pegjs": "^2.1.3",
diff --git a/yarn.lock b/yarn.lock
index 2666b13..f28f657 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -18,6 +18,11 @@
     esutils "^2.0.2"
     js-tokens "^4.0.0"
 
+"@types/estree@*":
+  version "0.0.42"
+  resolved "https://registry.yarnpkg.com/@types/estree/-/estree-0.0.42.tgz#8d0c1f480339efedb3e46070e22dd63e0430dd11"
+  integrity sha512-K1DPVvnBCPxzD+G51/cxVIoc2X8uUVl1zpJeE6iKcgHMj4+tbat5Xu4TjV7v2QSDbIeAfLi2hIk+u2+s0MlpUQ==
+
 "@types/estree@0.0.39":
   version "0.0.39"
   resolved "https://registry.yarnpkg.com/@types/estree/-/estree-0.0.39.tgz#e177e699ee1b8c22d23174caaa7422644389509f"
@@ -28,11 +33,6 @@
   resolved "https://registry.yarnpkg.com/@types/node/-/node-12.0.10.tgz#51babf9c7deadd5343620055fc8aff7995c8b031"
   integrity sha512-LcsGbPomWsad6wmMNv7nBLw7YYYyfdYcz6xryKYQhx89c3XXan+8Q6AJ43G5XDIaklaVkK3mE4fCb0SBvMiPSQ==
 
-"@types/node@^12.0.8":
-  version "12.0.8"
-  resolved "https://registry.yarnpkg.com/@types/node/-/node-12.0.8.tgz#551466be11b2adc3f3d47156758f610bd9f6b1d8"
-  integrity sha512-b8bbUOTwzIY3V5vDTY1fIJ+ePKDUBqt2hC2woVGotdQQhG/2Sh62HOKHrT7ab+VerXAcPyAiTEipPu/FsreUtg==
-
 "@types/pegjs@^0.10.1":
   version "0.10.1"
   resolved "https://registry.yarnpkg.com/@types/pegjs/-/pegjs-0.10.1.tgz#9a2f3961dc62430fdb21061eb0ddbd890f9e3b94"
@@ -45,10 +45,10 @@
   dependencies:
     "@types/node" "*"
 
-acorn@^6.1.1:
-  version "6.1.1"
-  resolved "https://registry.yarnpkg.com/acorn/-/acorn-6.1.1.tgz#7d25ae05bb8ad1f9b699108e1094ecd7884adc1f"
-  integrity sha512-jPTiwtOxaHNaAPg/dmrJ/beuzLRnXtB0kQPQ8JpotKJgTB6rX6c8mlf315941pyjBSaPg8NHXS9fhP4u17DpGA==
+acorn@^7.1.0:
+  version "7.1.0"
+  resolved "https://registry.yarnpkg.com/acorn/-/acorn-7.1.0.tgz#949d36f2c292535da602283586c2477c57eb2d6c"
+  integrity sha512-kL5CuoXA/dgxlBbVrflsflzQ3PAas7RYZB52NOm/6839iVYJgKMJ3cQJD+t2i5+qFa8h3MDpEOJiS64E8JLnSQ==
 
 ansi-styles@^3.2.1:
   version "3.2.1"
@@ -790,7 +790,7 @@ path-parse@^1.0.6:
 
 pegjs@^0.10.0:
   version "0.10.0"
-  resolved "http://registry.npmjs.org/pegjs/-/pegjs-0.10.0.tgz#cf8bafae6eddff4b5a7efb185269eaaf4610ddbd"
+  resolved "https://registry.npmjs.org/pegjs/-/pegjs-0.10.0.tgz#cf8bafae6eddff4b5a7efb185269eaaf4610ddbd"
 
 posix-character-classes@^0.1.0:
   version "0.1.1"
@@ -948,14 +948,14 @@ rollup-pluginutils@^2.7.0, rollup-pluginutils@^2.8.1:
   dependencies:
     estree-walker "^0.6.1"
 
-rollup@^1.15.6:
-  version "1.15.6"
-  resolved "https://registry.yarnpkg.com/rollup/-/rollup-1.15.6.tgz#caf0ed28d2d78e3a59c1398e5a3695fb600a0ef0"
-  integrity sha512-s3Vn3QJQ5YVFfIG4nXoG9VdL1I37IZsft+4ZyeBhxE0df1kCFz9e+4bEAbR4mKH3pvBO9e9xjdxWPhhIp0r9ow==
+rollup@^1.31.1:
+  version "1.31.1"
+  resolved "https://registry.yarnpkg.com/rollup/-/rollup-1.31.1.tgz#4170d6f87148d46e5fbe29b493f8f3ea3453c96f"
+  integrity sha512-2JREN1YdrS/kpPzEd33ZjtuNbOuBC3ePfuZBdKEybvqcEcszW1ckyVqzcEiEe0nE8sqHK+pbJg+PsAgRJ8+1dg==
   dependencies:
-    "@types/estree" "0.0.39"
-    "@types/node" "^12.0.8"
-    acorn "^6.1.1"
+    "@types/estree" "*"
+    "@types/node" "*"
+    acorn "^7.1.0"
 
 safe-buffer@~5.1.0, safe-buffer@~5.1.1:
   version "5.1.2"