diff --git a/.travis.yml b/.travis.yml
index 0c39bf0..97f5b47 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -5,9 +5,6 @@ sudo: true
 node_js:
   - 14.17.0
 
-install:
-  - yarn
-
 script:
   npm test
 
diff --git a/package-lock.json b/package-lock.json
index 71a4faf..dbddbe1 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,11 +1,11 @@
 {
   "name": "ngx-mqtt",
-  "version": "9.0.3",
+  "version": "9.0.4",
   "lockfileVersion": 2,
   "requires": true,
   "packages": {
     "": {
-      "version": "9.0.3",
+      "version": "9.0.4",
       "hasInstallScript": true,
       "license": "MIT",
       "dependencies": {
diff --git a/package.json b/package.json
index 1c1afbb..c4f29d7 100644
--- a/package.json
+++ b/package.json
@@ -46,7 +46,7 @@
     "tslib": "^2.1.0",
     "zone.js": "~0.11.4"
   },
-  "peerDependencies": {
+  "devDependencies": {
     "@angular-builders/custom-webpack": "^12.0.0",
     "@angular-devkit/build-angular": "~12.0.3",
     "@angular/cli": "~12.0.3",
diff --git a/projects/ngx-mqtt/package-lock.json b/projects/ngx-mqtt/package-lock.json
index 9cfd116..1a443ba 100644
--- a/projects/ngx-mqtt/package-lock.json
+++ b/projects/ngx-mqtt/package-lock.json
@@ -1,11 +1,11 @@
 {
   "name": "ngx-mqtt",
-  "version": "9.0.3",
+  "version": "9.0.4",
   "lockfileVersion": 2,
   "requires": true,
   "packages": {
     "": {
-      "version": "9.0.3",
+      "version": "9.0.4",
       "dependencies": {
         "mqtt-browser": "4.2.7",
         "mqtt-packet": "6.10.0",