diff --git a/package.json b/package.json
index ec3b8f9..1444cdc 100644
--- a/package.json
+++ b/package.json
@@ -40,7 +40,7 @@
   "homepage": "https://github.com/filipesilva/create-cljs-app#readme",
   "devDependencies": {
     "clj-kondo": "2020.01.13",
-    "shadow-cljs": "^2.11.4",
+    "shadow-cljs": "^2.20.16",
     "shx": "^0.3.2",
     "zprint-clj": "^0.8.0"
   },
diff --git a/yarn.lock b/yarn.lock
index cb95b9e..8725396 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -80,11 +80,6 @@ assert@^1.1.1:
     object-assign "^4.1.1"
     util "0.10.3"
 
-async-limiter@~1.0.0:
-  version "1.0.1"
-  resolved "https://registry.yarnpkg.com/async-limiter/-/async-limiter-1.0.1.tgz#dd379e94f0db8310b08291f9d64c3209766617fd"
-  integrity sha512-csOlWGAcRFJaI6m+F2WKdnMKr4HhdhFVBk0H/QbJFMCr+uO2kwohwXQPxw/9OCxp05r5ghVBFSyioixx3gfkNQ==
-
 asynckit@^0.4.0:
   version "0.4.0"
   resolved "https://registry.yarnpkg.com/asynckit/-/asynckit-0.4.0.tgz#c79ed97f7f34cb8f2ba1bc9790bcc366474b4b79"
@@ -448,7 +443,7 @@ ecc-jsbn@~0.1.1:
     jsbn "~0.1.0"
     safer-buffer "^2.1.0"
 
-elliptic@6.5.3, elliptic@^6.0.0:
+elliptic@^6.0.0:
   version "6.5.3"
   resolved "https://registry.yarnpkg.com/elliptic/-/elliptic-6.5.3.tgz#cb59eb2efdaf73a0bd78ccd7015a62ad6e0f93d6"
   integrity sha512-IMqzv5wNQf+E6aHeIqATs0tOLeOTwj1QKbRcS3jBbYkl5oLAserA8yJTT7/VyHUYG91PRmPyeQDObKLPpeS4dw==
@@ -1202,17 +1197,17 @@ shadow-cljs-jar@1.3.2:
   resolved "https://registry.yarnpkg.com/shadow-cljs-jar/-/shadow-cljs-jar-1.3.2.tgz#97273afe1747b6a2311917c1c88d9e243c81957b"
   integrity sha512-XmeffAZHv8z7451kzeq9oKh8fh278Ak+UIOGGrapyqrFBB773xN8vMQ3O7J7TYLnb9BUwcqadKkmgaq7q6fhZg==
 
-shadow-cljs@^2.11.4:
-  version "2.11.4"
-  resolved "https://registry.yarnpkg.com/shadow-cljs/-/shadow-cljs-2.11.4.tgz#11778b0cccd67be472f57278a0b870ed17ca878c"
-  integrity sha512-sIc1MfN/JsGenbFkDXs0+iVrKTSzAE5DzBFuUGxHc4LbcAJ9GWRQlAeE0WRT3fOCQQOlxeBLrxlZ6WiUjKlQgg==
+shadow-cljs@^2.20.16:
+  version "2.20.16"
+  resolved "https://registry.yarnpkg.com/shadow-cljs/-/shadow-cljs-2.20.16.tgz#32e83586fcc91a246b7fb622349135ad84ca1a19"
+  integrity sha512-k33ssZppDkBSYIfKswiKOX/8bNTnHbHoTmwf3KBPXBQkDPptPR3FeedmWtS5vKWnucFTe9DObhM2exKocErIxw==
   dependencies:
     node-libs-browser "^2.2.1"
     readline-sync "^1.4.7"
     shadow-cljs-jar "1.3.2"
     source-map-support "^0.4.15"
     which "^1.3.1"
-    ws "^3.0.0"
+    ws "^7.4.6"
 
 shelljs@^0.8.1, shelljs@^0.8.4:
   version "0.8.4"
@@ -1378,11 +1373,6 @@ tweetnacl@^0.14.3, tweetnacl@~0.14.0:
   resolved "https://registry.yarnpkg.com/tweetnacl/-/tweetnacl-0.14.5.tgz#5ae68177f192d4456269d108afa93ff8743f4f64"
   integrity sha1-WuaBd/GS1EViadEIr6k/+HQ/T2Q=
 
-ultron@~1.1.0:
-  version "1.1.1"
-  resolved "https://registry.yarnpkg.com/ultron/-/ultron-1.1.1.tgz#9fe1536a10a664a65266a1e3ccf85fd36302bc9c"
-  integrity sha512-UIEXBNeYmKptWH6z8ZnqTeS8fV74zG0/eRU9VGkpzz+LIJNs8W/zM/L+7ctCkRrgbNnnR0xxw4bKOr0cW0N0Og==
-
 unzip-stream@^0.3.0:
   version "0.3.0"
   resolved "https://registry.yarnpkg.com/unzip-stream/-/unzip-stream-0.3.0.tgz#c30c054cd6b0d64b13a23cd3ece911eb0b2b52d8"
@@ -1463,14 +1453,10 @@ wrappy@1:
   resolved "https://registry.yarnpkg.com/wrappy/-/wrappy-1.0.2.tgz#b5243d8f3ec1aa35f1364605bc0d1036e30ab69f"
   integrity sha1-tSQ9jz7BqjXxNkYFvA0QNuMKtp8=
 
-ws@^3.0.0:
-  version "3.3.3"
-  resolved "https://registry.yarnpkg.com/ws/-/ws-3.3.3.tgz#f1cf84fe2d5e901ebce94efaece785f187a228f2"
-  integrity sha512-nnWLa/NwZSt4KQJu51MYlCcSQ5g7INpOrOMt4XV8j4dqTXdmlUmSHQ8/oLC069ckre0fRsgfvsKwbTdtKLCDkA==
-  dependencies:
-    async-limiter "~1.0.0"
-    safe-buffer "~5.1.0"
-    ultron "~1.1.0"
+ws@^7.4.6:
+  version "7.5.9"
+  resolved "https://registry.yarnpkg.com/ws/-/ws-7.5.9.tgz#54fa7db29f4c7cec68b1ddd3a89de099942bb591"
+  integrity sha512-F+P9Jil7UiSKSkppIiD94dN07AwvFixvLIj1Og1Rl9GGMuNipJnV9JzjD6XuqmAeiswGvUmNLjr5cFuXwNS77Q==
 
 xtend@^4.0.0:
   version "4.0.2"