diff --git a/.rczrc.onrelease.js b/.rczrc.onrelease.js
new file mode 100644
index 0000000..6ecf4de
--- /dev/null
+++ b/.rczrc.onrelease.js
@@ -0,0 +1,14 @@
+const fs = require("fs");
+
+const packageFile = fs.readFileSync("./package.json").toString();
+const newPackageFile = packageFile.replace(
+  /"version": "[0-9]+.[0-9]+.[0-9]+"/,
+  `"version": "${__NEW_VERSION__}"`
+);
+
+fs.writeFileSync("./package.json", newPackageFile);
+
+const indexFile = fs.readFileSync("./src/index.ts").toString();
+const newIndexFile = indexFile.replace(/version\("[0-9]+\.[0-9]+\.[0-9]+"\)/);
+
+fs.writeFileSync("./src/index.ts", newIndexFile);
diff --git a/.vscode/settings.json b/.vscode/settings.json
index ba4e57f..99e8483 100644
--- a/.vscode/settings.json
+++ b/.vscode/settings.json
@@ -1,3 +1,10 @@
 {
-  "cSpell.words": ["Resultium", "Acked", "johndoe", "outro", "rczrc"]
+  "cSpell.words": [
+    "Acked",
+    "johndoe",
+    "onrelease",
+    "outro",
+    "rczrc",
+    "Resultium"
+  ]
 }
diff --git a/README.md b/README.md
index 30c0adf..6932ce8 100644
--- a/README.md
+++ b/README.md
@@ -39,3 +39,26 @@ You can create an `.rczrc`, `.rczrc.json` or `rcz.config.json` file in your root
   "autoSignReleases": true
 }
 ```
+
+You are also able to create an onRelease event file, that is going to run before creation of a git tag and a release commit, when `rcz release` is run. The file is to be named `.rczrc.onrelease.js`. A sample can be seen below.
+
+```js
+const fs = require("fs"); // Require fileSystem
+
+const packageFile = fs.readFileSync("./package.json").toString(); // Get package.json contents from the current working directory
+const newPackageFile = packageFile.replace(
+  /"version": "[0-9]+.[0-9]+.[0-9]+"/,
+  `"version": "${__NEW_VERSION__}"`
+); // Use RegExp to replace package.json version
+
+fs.writeFileSync("./package.json", newPackageFile); // Write to package.json file its new content
+
+const indexFile = fs.readFileSync("./src/index.ts").toString(); // Get index.ts file from source code directory
+const newIndexFile = indexFile.replace(/version\("[0-9]+\.[0-9]+\.[0-9]+"\)/); // Replace class function call content with the new version
+
+fs.writeFileSync("./src/index.ts", newIndexFile); // Write to source code index file
+```
+
+In your onRelease file you are provided with `__NEW_VERSION__` constant string which is the new version submitted in `rcz release` and `__IS_SIGNED__` constant which is a boolean telling whether the release (it's commit and tag) is going to be signed.
+
+Bear in mind, **this script is going to be executed through `eval()` with no sanitation**, be careful with whatever you write.
diff --git a/src/index.ts b/src/index.ts
index cbfdc95..7341721 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -424,24 +424,40 @@ program
     const config = await GetConfig();
 
     const sign = config?.autoSignReleases || options.sign ? true : false;
-
     const version = string.replace("v", "");
-    const packageFile = JSON.parse(
-      (
-        await fs.promises.readFile(path.join(process.cwd(), "package.json"))
-      ).toString()
-    );
 
-    if (!packageFile) {
-      console.log("[rcz]: this directory does not have a package.json file");
+    const onReleaseFile = (
+      await fs.promises.readFile(
+        path.join(process.cwd(), ".rczrc.onrelease.js")
+      )
+    ).toString();
+
+    if (onReleaseFile) {
+      const releaseScript = `
+        const __NEW_VERSION__ = "${version}";
+        const __IS_SIGNED__ = ${sign};
+
+        ${onReleaseFile}`;
+
+      eval(releaseScript);
+    } else {
+      const packageFile = JSON.parse(
+        (
+          await fs.promises.readFile(path.join(process.cwd(), "package.json"))
+        ).toString()
+      );
+
+      if (!packageFile) {
+        console.log("[rcz]: this directory does not have a package.json file");
+      }
+
+      packageFile.version = version;
+      await fs.promises.writeFile(
+        path.join(process.cwd(), "package.json"),
+        JSON.stringify(packageFile, null, 4)
+      );
     }
 
-    packageFile.version = version;
-    await fs.promises.writeFile(
-      path.join(process.cwd(), "package.json"),
-      JSON.stringify(packageFile, null, 4)
-    );
-
     await simpleGit()
       .add(".")
       .commit(`chore(release): v${version}`, sign ? ["-S"] : [])