diff --git a/.github/workflows/auto-url.yml b/.github/workflows/auto-url.yml
index e606202..9d21a11 100644
--- a/.github/workflows/auto-url.yml
+++ b/.github/workflows/auto-url.yml
@@ -17,7 +17,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        node-version: [18.x, 20.x]
+        node-version: [20.x]
       fail-fast: false
     steps:
       - name: Harden Runner
diff --git a/.github/workflows/ephemeral-map.yml b/.github/workflows/ephemeral-map.yml
index 1e46ef2..39d587d 100644
--- a/.github/workflows/ephemeral-map.yml
+++ b/.github/workflows/ephemeral-map.yml
@@ -17,7 +17,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        node-version: [16.x, 18.x]
+        node-version: [20.x]
       fail-fast: false
     steps:
       - name: Harden Runner
diff --git a/.github/workflows/mutex.yml b/.github/workflows/mutex.yml
index 1b4bfc3..b5f04d1 100644
--- a/.github/workflows/mutex.yml
+++ b/.github/workflows/mutex.yml
@@ -17,7 +17,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        node-version: [16.x, 18.x]
+        node-version: [20.x]
       fail-fast: false
     steps:
       - name: Harden Runner
diff --git a/.github/workflows/timestore.yml b/.github/workflows/timestore.yml
index f696f5a..ded5dca 100644
--- a/.github/workflows/timestore.yml
+++ b/.github/workflows/timestore.yml
@@ -17,7 +17,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        node-version: [16.x, 18.x]
+        node-version: [20.x]
       fail-fast: false
     steps:
       - name: Harden Runner
diff --git a/src/auto-url/README.md b/src/auto-url/README.md
index 67f65c3..9487ad2 100644
--- a/src/auto-url/README.md
+++ b/src/auto-url/README.md
@@ -7,7 +7,7 @@
 </p>
 
 ## Requirements
-- [Node.js](https://nodejs.org/en/) v18 or higher
+- [Node.js](https://nodejs.org/en/) v20 or higher
 
 ## Getting Started
 
diff --git a/src/ephemeral-map/README.md b/src/ephemeral-map/README.md
index c7511b5..2900288 100644
--- a/src/ephemeral-map/README.md
+++ b/src/ephemeral-map/README.md
@@ -7,7 +7,7 @@
 </p>
 
 ## Requirements
-- [Node.js](https://nodejs.org/en/) v16 or higher
+- [Node.js](https://nodejs.org/en/) v20 or higher
 
 ## Getting Started
 
diff --git a/src/mutex/README.md b/src/mutex/README.md
index 0442cc4..94bc624 100644
--- a/src/mutex/README.md
+++ b/src/mutex/README.md
@@ -22,7 +22,7 @@
 </p>
 
 ## Requirements
-- [Node.js](https://nodejs.org/en/) v16 or higher
+- [Node.js](https://nodejs.org/en/) v20 or higher
 
 ## Getting Started
 
diff --git a/src/result/README.md b/src/result/README.md
index 94e9eae..d9b6733 100644
--- a/src/result/README.md
+++ b/src/result/README.md
@@ -7,7 +7,7 @@
 </p>
 
 ## Requirements
-- [Node.js](https://nodejs.org/en/) v16 or higher
+- [Node.js](https://nodejs.org/en/) v20 or higher
 
 ## Getting Started
 
diff --git a/src/timestore/README.md b/src/timestore/README.md
index 1b3165f..405550f 100644
--- a/src/timestore/README.md
+++ b/src/timestore/README.md
@@ -25,7 +25,7 @@
 > Internally it uses a Node.js timer. This library does not guarantee that the timers doesn't drift.
 
 ## Requirements
-- [Node.js](https://nodejs.org/en/) v16 or higher
+- [Node.js](https://nodejs.org/en/) v20 or higher
 
 ## Getting Started