diff --git a/package.json b/package.json
index e2025ce..10e20f2 100644
--- a/package.json
+++ b/package.json
@@ -29,8 +29,8 @@
   "dependencies": {},
   "devDependencies": {
     "@aureooms/js-itertools": "4.1.0",
-    "@babel/cli": "7.12.7",
-    "@babel/core": "7.12.7",
+    "@babel/cli": "7.12.8",
+    "@babel/core": "7.12.8",
     "@babel/polyfill": "7.12.1",
     "@babel/preset-env": "7.12.7",
     "@babel/register": "7.12.1",
diff --git a/yarn.lock b/yarn.lock
index f636d15..56c4fe2 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -22,10 +22,10 @@
     "@aureooms/js-collections-deque" "^4.0.1"
     "@aureooms/js-error" "^4.0.1"
 
-"@babel/cli@7.12.7":
-  version "7.12.7"
-  resolved "https://registry.yarnpkg.com/@babel/cli/-/cli-7.12.7.tgz#63a3c38bddff02a1c633c70f2fd03019af6bf977"
-  integrity sha512-vE1fidQsaWnQVs4SItkuCdi3+uXqjbhw4cIKp8aawKxOnTnlvxYMzXSeMAqo6alldQRFQYb198YQfW0Sp1jl5Q==
+"@babel/cli@7.12.8":
+  version "7.12.8"
+  resolved "https://registry.yarnpkg.com/@babel/cli/-/cli-7.12.8.tgz#3b24ed2fd5da353ee6f19e8935ff8c93b5fe8430"
+  integrity sha512-/6nQj11oaGhLmZiuRUfxsujiPDc9BBReemiXgIbxc+M5W+MIiFKYwvNDJvBfnGKNsJTKbUfEheKc9cwoPHAVQA==
   dependencies:
     commander "^4.0.1"
     convert-source-map "^1.1.0"
@@ -58,10 +58,10 @@
   resolved "https://registry.yarnpkg.com/@babel/compat-data/-/compat-data-7.12.7.tgz#9329b4782a7d6bbd7eef57e11addf91ee3ef1e41"
   integrity sha512-YaxPMGs/XIWtYqrdEOZOCPsVWfEoriXopnsz3/i7apYPXQ3698UFhS6dVT1KN5qOsWmVgw/FOrmQgpRaZayGsw==
 
-"@babel/core@7.12.7":
-  version "7.12.7"
-  resolved "https://registry.yarnpkg.com/@babel/core/-/core-7.12.7.tgz#bf55363c08c8352a37691f7216ec30090bf7e3bf"
-  integrity sha512-tRKx9B53kJe8NCGGIxEQb2Bkr0riUIEuN7Sc1fxhs5H8lKlCWUvQCSNMVIB0Meva7hcbCRJ76de15KoLltdoqw==
+"@babel/core@7.12.8":
+  version "7.12.8"
+  resolved "https://registry.yarnpkg.com/@babel/core/-/core-7.12.8.tgz#8ad76c1a7d2a6a3beecc4395fa4f7b4cb88390e6"
+  integrity sha512-ra28JXL+5z73r1IC/t+FT1ApXU5LsulFDnTDntNfLQaScJUJmcHL5Qxm/IWanCToQk3bPWQo5bflbplU5r15pg==
   dependencies:
     "@babel/code-frame" "^7.10.4"
     "@babel/generator" "^7.12.5"
@@ -69,7 +69,7 @@
     "@babel/helpers" "^7.12.5"
     "@babel/parser" "^7.12.7"
     "@babel/template" "^7.12.7"
-    "@babel/traverse" "^7.12.7"
+    "@babel/traverse" "^7.12.8"
     "@babel/types" "^7.12.7"
     convert-source-map "^1.7.0"
     debug "^4.1.0"
@@ -1148,7 +1148,7 @@
     globals "^11.1.0"
     lodash "^4.17.19"
 
-"@babel/traverse@^7.12.5", "@babel/traverse@^7.12.7":
+"@babel/traverse@^7.12.5":
   version "7.12.7"
   resolved "https://registry.yarnpkg.com/@babel/traverse/-/traverse-7.12.7.tgz#572a722408681cef17d6b0bef69ef2e728ca69f1"
   integrity sha512-nMWaqsQEeSvMNypswUDzjqQ+0rR6pqCtoQpsqGJC4/Khm9cISwPTSpai57F6/jDaOoEGz8yE/WxcO3PV6tKSmQ==
@@ -1163,6 +1163,21 @@
     globals "^11.1.0"
     lodash "^4.17.19"
 
+"@babel/traverse@^7.12.8":
+  version "7.12.8"
+  resolved "https://registry.yarnpkg.com/@babel/traverse/-/traverse-7.12.8.tgz#c1c2983bf9ba0f4f0eaa11dff7e77fa63307b2a4"
+  integrity sha512-EIRQXPTwFEGRZyu6gXbjfpNORN1oZvwuzJbxcXjAgWV0iqXYDszN1Hx3FVm6YgZfu1ZQbCVAk3l+nIw95Xll9Q==
+  dependencies:
+    "@babel/code-frame" "^7.10.4"
+    "@babel/generator" "^7.12.5"
+    "@babel/helper-function-name" "^7.10.4"
+    "@babel/helper-split-export-declaration" "^7.11.0"
+    "@babel/parser" "^7.12.7"
+    "@babel/types" "^7.12.7"
+    debug "^4.1.0"
+    globals "^11.1.0"
+    lodash "^4.17.19"
+
 "@babel/types@^7.10.1", "@babel/types@^7.10.2", "@babel/types@^7.4.4":
   version "7.10.2"
   resolved "https://registry.yarnpkg.com/@babel/types/-/types-7.10.2.tgz#30283be31cad0dbf6fb00bd40641ca0ea675172d"