diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index bd651e5..2cfa2fa 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -53,7 +53,7 @@ Violations can be reported by opening a private GitHub issue or contacting a mai
 
 ### Prerequisites
 
-- Node.js >= 18 (we recommend [nvm](https://github.com/nvm-sh/nvm))
+- Node.js >= 20.9 (we recommend [nvm](https://github.com/nvm-sh/nvm))
 - npm >= 9
 
 ### Install Dependencies
diff --git a/README.md b/README.md
index 2510591..56d2eee 100644
--- a/README.md
+++ b/README.md
@@ -37,7 +37,7 @@ Smart contracts on Stellar/Soroban emit events as cryptic, hex-encoded binary da
 
 ### Prerequisites
 
-- Node.js >= 18
+- Node.js >= 20.9
 - npm >= 9
 
 ### Installation
diff --git a/package-lock.json b/package-lock.json
index ec3f40e..5245013 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -95,6 +95,9 @@
         "util-deprecate": "^1.0.2",
         "vitest": "^3.2.7",
         "vitest-axe": "^0.1.0"
+      },
+      "engines": {
+        "node": ">=20.9.0"
       }
     },
     "node_modules/@acemir/cssom": {