diff --git a/.github/workflows/lint.yml b/.github/workflows/lint.yml
index 9d2dee5..e921b0f 100644
--- a/.github/workflows/lint.yml
+++ b/.github/workflows/lint.yml
@@ -13,7 +13,7 @@ jobs:
           fetch-depth: 1
 
       - name: Cache node modules
-        uses: actions/cache@v2
+        uses: actions/cache@v4
         env:
           cache-name: cache-node-modules
         with:
diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index cc7e52e..440731e 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -16,7 +16,7 @@ jobs:
           fetch-depth: 1
 
       - name: Cache node modules
-        uses: actions/cache@v2
+        uses: actions/cache@v4
         env:
           cache-name: cache-node-modules
         with:
diff --git a/README.md b/README.md
index 635c48c..7e38c16 100644
--- a/README.md
+++ b/README.md
@@ -10,6 +10,26 @@
 <br />
 <br />
 
+> ⚠️ **DEPRECATED – DO NOT USE**
+>
+> This repository is no longer maintained and is **deprecated**.
+>
+> It may contain **outdated, insecure, or vulnerable code** and should **not** be used in production or as a dependency in any project.
+>
+> The repository is retained solely for historical reference. No support, updates, or security patches will be provided.
+
+## Soft-deprecation notice
+
+Smock has had a fruitful life, and its legacy lives on
+[smock-foundry](https://github.com/defi-wonderland/smock-foundry), a
+re-implementation for foundry which we now use exclusively as a side-effect of
+using `foundry` for all new projects.
+
+We won't migrate the project to
+newer versions of peer dependencies, as specified in
+[#201](https://github.com/defi-wonderland/smock/issues/201)
+
+# Overview
 **Smock** is the **S**olidity **mock**ing library. It's a plugin for
 [hardhat](https://hardhat.org) that can be used to create mock Solidity
 contracts entirely in JavaScript (or TypeScript!). With Smock, it's
diff --git a/package.json b/package.json
index 2c37567..f60e927 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@defi-wonderland/smock",
-  "version": "2.4.0",
+  "version": "2.4.1",
   "description": "The Solidity mocking library",
   "keywords": [
     "ethereum",
diff --git a/yarn.lock b/yarn.lock
index 0b71510..a2f61ee 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -3761,6 +3761,19 @@ elliptic@6.5.4, elliptic@^6.4.0, elliptic@^6.5.2, elliptic@^6.5.3:
     minimalistic-assert "^1.0.1"
     minimalistic-crypto-utils "^1.0.1"
 
+elliptic@^6.5.7:
+  version "6.5.7"
+  resolved "https://registry.yarnpkg.com/elliptic/-/elliptic-6.5.7.tgz#8ec4da2cb2939926a1b9a73619d768207e647c8b"
+  integrity sha512-ESVCtTwiA+XhY3wyh24QqRGBoP3rEdDUl3EDUUo9tft074fi19IrdpH7hLCMMP3CIj7jb3W96rn8lt/BqIlt5Q==
+  dependencies:
+    bn.js "^4.11.9"
+    brorand "^1.1.0"
+    hash.js "^1.0.0"
+    hmac-drbg "^1.0.1"
+    inherits "^2.0.4"
+    minimalistic-assert "^1.0.1"
+    minimalistic-crypto-utils "^1.0.1"
+
 emoji-regex@^7.0.1:
   version "7.0.3"
   resolved "https://registry.yarnpkg.com/emoji-regex/-/emoji-regex-7.0.3.tgz#933a04052860c85e83c122479c4748a8e4c72156"
@@ -7144,6 +7157,11 @@ node-addon-api@^2.0.0:
   resolved "https://registry.yarnpkg.com/node-addon-api/-/node-addon-api-2.0.2.tgz#432cfa82962ce494b132e9d72a15b29f71ff5d32"
   integrity sha512-Ntyt4AIXyaLIuMHF6IOoTakB3K+RWxwtsHNRxllEoA6vPwP9o4866g6YWDLUdnucilZhmkxiHwHr11gAENw+QA==
 
+node-addon-api@^5.0.0:
+  version "5.1.0"
+  resolved "https://registry.yarnpkg.com/node-addon-api/-/node-addon-api-5.1.0.tgz#49da1ca055e109a23d537e9de43c09cca21eb762"
+  integrity sha512-eh0GgfEkpnoWDq+VY8OyvYhFEzBk6jIYbRKdIlyTiAXIVJ8PyBaKb0rp7oDtoddbdoHWhq8wwr+XZ81F1rpNdA==
+
 node-fetch@2.1.2:
   version "2.1.2"
   resolved "https://registry.yarnpkg.com/node-fetch/-/node-fetch-2.1.2.tgz#ab884e8e7e57e38a944753cec706f788d1768bb5"
@@ -8439,12 +8457,12 @@ scryptsy@^1.2.1:
     pbkdf2 "^3.0.3"
 
 secp256k1@^4.0.1:
-  version "4.0.2"
-  resolved "https://registry.yarnpkg.com/secp256k1/-/secp256k1-4.0.2.tgz#15dd57d0f0b9fdb54ac1fa1694f40e5e9a54f4a1"
-  integrity sha512-UDar4sKvWAksIlfX3xIaQReADn+WFnHvbVujpcbr+9Sf/69odMwy2MUsz5CKLQgX9nsIyrjuxL2imVyoNHa3fg==
+  version "4.0.4"
+  resolved "https://registry.yarnpkg.com/secp256k1/-/secp256k1-4.0.4.tgz#58f0bfe1830fe777d9ca1ffc7574962a8189f8ab"
+  integrity sha512-6JfvwvjUOn8F/jUoBY2Q1v5WY5XS+rj8qSe0v8Y4ezH4InLgTEeOOPQsRll9OV429Pvo6BCHGavIyJfr3TAhsw==
   dependencies:
-    elliptic "^6.5.2"
-    node-addon-api "^2.0.0"
+    elliptic "^6.5.7"
+    node-addon-api "^5.0.0"
     node-gyp-build "^4.2.0"
 
 seedrandom@3.0.1: