diff --git a/hak/tsconfig.json b/hak/tsconfig.json
index 5cf06a3..94abce3 100644
--- a/hak/tsconfig.json
+++ b/hak/tsconfig.json
@@ -5,7 +5,7 @@
         "target": "es2016",
         "sourceMap": false,
         "strict": true,
-        "lib": ["es2019"]
+        "lib": ["es2020"]
     },
     "include": ["../scripts/@types/*.d.ts", "./**/*.ts"],
     "ts-node": {
diff --git a/scripts/tsconfig.json b/scripts/tsconfig.json
index 96a7b4e..4e547d9 100644
--- a/scripts/tsconfig.json
+++ b/scripts/tsconfig.json
@@ -7,7 +7,7 @@
         "module": "commonjs",
         "sourceMap": false,
         "strict": true,
-        "lib": ["es2019", "dom"]
+        "lib": ["es2020", "dom"]
     },
     "include": ["../src/@types", "./**/*.ts"],
     "ts-node": {
diff --git a/test/tsconfig.json b/test/tsconfig.json
index f032c77..60c773a 100644
--- a/test/tsconfig.json
+++ b/test/tsconfig.json
@@ -7,7 +7,7 @@
         "module": "commonjs",
         "sourceMap": false,
         "strict": true,
-        "lib": ["es2019", "dom"]
+        "lib": ["es2020", "dom"]
     },
     "include": ["./**/*.ts"],
     "ts-node": {
diff --git a/tsconfig.json b/tsconfig.json
index 008a811..a6e97c9 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -10,7 +10,7 @@
         "rootDir": "./src",
         "declaration": true,
         "typeRoots": ["src/@types", "node_modules/@types"],
-        "lib": ["es2019", "dom"],
+        "lib": ["es2020", "dom"],
         "types": ["node"],
         "strict": true
     },