diff --git a/.circleci/config.yml b/.circleci/config.yml
index 9228dd24..887d25f1 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -2,7 +2,7 @@ version: 2
 jobs:
   build:
     docker:
-      - image: node:14.18.1-buster-slim
+      - image: node:16.13.1-buster-slim
     working_directory: /var/opt/app
     steps:
       - checkout
@@ -14,13 +14,13 @@ jobs:
       - restore_cache:
           name: Restoring cache - node_modules
           keys:
-            - node_modules-{{ arch }}-node14.15.1-{{ checksum "package.json" }}-{{ checksum "yarn.lock" }}
+            - node_modules-{{ arch }}-node16.13.1-{{ checksum "package.json" }}-{{ checksum "yarn.lock" }}
       - run:
           name: Install packages
           command: yarn install
       - save_cache:
           name: Saving cache - node_modules
-          key: node_modules-{{ arch }}-node14.15.1-{{ checksum "package.json" }}-{{ checksum "yarn.lock" }}
+          key: node_modules-{{ arch }}-node16.13.1-{{ checksum "package.json" }}-{{ checksum "yarn.lock" }}
           paths:
             - node_modules
       - run:
diff --git a/README.md b/README.md
index a928b77c..fece2fe4 100644
--- a/README.md
+++ b/README.md
@@ -94,7 +94,7 @@ We'd love you to contribute to Whalebird.
 
 ### Minimum requirements for development
 
-* Node.js greater than or equal version 8.9.0 (12.x is recommended)
+* Node.js greater than or equal version 15.0.0 (16.x is recommended)
 * npm or yarn
 
 ### Getting started