diff --git a/package-lock.json b/package-lock.json
index 5cfeecdd5..680bf7f07 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "speech-rule-engine",
-  "version": "4.0.0",
+  "version": "4.0.1",
   "lockfileVersion": 2,
   "requires": true,
   "packages": {
     "": {
       "name": "speech-rule-engine",
-      "version": "4.0.0",
+      "version": "4.0.1",
       "license": "Apache-2.0",
       "dependencies": {
         "commander": "8.3.0",
diff --git a/package.json b/package.json
index c6d19ab84..da9eb0679 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "speech-rule-engine",
-  "version": "4.0.0",
+  "version": "4.0.1",
   "description": "A standalone speech rule engine for XML structures, based on the original engine from ChromeVox.",
   "directories": {
     "test": "tests"
diff --git a/ts/common/variables.ts b/ts/common/variables.ts
index eba69091e..3881ee1b0 100644
--- a/ts/common/variables.ts
+++ b/ts/common/variables.ts
@@ -22,7 +22,7 @@ export class Variables {
   /**
    * SRE version.
    */
-  public static readonly VERSION: string = '4.0.0';
+  public static readonly VERSION: string = '4.0.1';
 
   /**
    * List of locales to load.