diff --git a/packages/@opticss/demo-app/package.json b/packages/@opticss/demo-app/package.json
index a1144700..76350be6 100644
--- a/packages/@opticss/demo-app/package.json
+++ b/packages/@opticss/demo-app/package.json
@@ -53,7 +53,7 @@
     "@opticss/util": "^0.7.0",
     "@types/mkdirp": "^0.5.1",
     "@types/parse5": "^5.0.0",
-    "@types/rimraf": "^2.0.2",
+    "@types/rimraf": "^3.0.0",
     "babel-cli": "^6.26.0",
     "babel-plugin-transform-es2015-modules-commonjs": "^6.26.0",
     "babel-preset-env": "^1.6.0",
diff --git a/yarn.lock b/yarn.lock
index c772a8fb..498d164d 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -953,10 +953,10 @@
   resolved "https://registry.yarnpkg.com/@types/random-js/-/random-js-1.0.31.tgz#18a8bcc075afa504421e638fcbe021f27e802941"
   integrity sha512-EAM56DrKw3VhcE4HV0/YlVKeJI07We4Mz1ra6TNtZpaMoiBVMA2bkLEcoFpYOyxoDXfVZWojxkR617LTqtRI0A==
 
-"@types/rimraf@^2.0.2":
-  version "2.0.2"
-  resolved "https://registry.yarnpkg.com/@types/rimraf/-/rimraf-2.0.2.tgz#7f0fc3cf0ff0ad2a99bb723ae1764f30acaf8b6e"
-  integrity sha512-Hm/bnWq0TCy7jmjeN5bKYij9vw5GrDFWME4IuxV08278NtU/VdGbzsBohcCUJ7+QMqmUq5hpRKB39HeQWJjztQ==
+"@types/rimraf@^3.0.0":
+  version "3.0.0"
+  resolved "https://registry.yarnpkg.com/@types/rimraf/-/rimraf-3.0.0.tgz#b9d03f090ece263671898d57bb7bb007023ac19f"
+  integrity sha512-7WhJ0MdpFgYQPXlF4Dx+DhgvlPCfz/x5mHaeDQAKhcenvQP1KCpLQ18JklAqeGMYSAT2PxLpzd0g2/HE7fj7hQ==
   dependencies:
     "@types/glob" "*"
     "@types/node" "*"
@@ -7407,10 +7407,10 @@ preserve@^0.2.0:
   resolved "https://registry.yarnpkg.com/preserve/-/preserve-0.2.0.tgz#815ed1f6ebc65926f865b310c0713bcb3315ce4b"
   integrity sha1-gV7R9uvGWSb4ZbMQwHE7yzMVzks=
 
-prettier@1.17.0:
-  version "1.17.0"
-  resolved "https://registry.yarnpkg.com/prettier/-/prettier-1.17.0.tgz#53b303676eed22cc14a9f0cec09b477b3026c008"
-  integrity sha512-sXe5lSt2WQlCbydGETgfm1YBShgOX4HxQkFPvbxkcwgDvGDeqVau8h+12+lmSVlP3rHPz0oavfddSZg/q+Szjw==
+prettier@1.17.1:
+  version "1.17.1"
+  resolved "https://registry.yarnpkg.com/prettier/-/prettier-1.17.1.tgz#ed64b4e93e370cb8a25b9ef7fef3e4fd1c0995db"
+  integrity sha512-TzGRNvuUSmPgwivDqkZ9tM/qTGW9hqDKWOE9YHiyQdixlKbv7kvEqsmDPrcHJTKwthU774TQwZXVtaQ/mMsvjg==
 
 pretty-bytes@^5.0.0:
   version "5.3.0"