diff --git a/cmd/project/ci.go b/cmd/project/ci.go
index cd73e1c..a2d00bd 100644
--- a/cmd/project/ci.go
+++ b/cmd/project/ci.go
@@ -62,11 +62,20 @@ var projectCI = &cobra.Command{
 			composerFlags = append(composerFlags, "--no-dev")
 		}
 
+		token, err := prepareComposerAuth(cmd.Context())
+
+		if err != nil {
+			return err
+		}
+
 		composer := phpexec.ComposerCommand(cmd.Context(), composerFlags...)
 		composer.Dir = args[0]
 		composer.Stdin = os.Stdin
 		composer.Stdout = os.Stdout
 		composer.Stderr = os.Stderr
+		composer.Env = append(os.Environ(),
+			"COMPOSER_AUTH="+token,
+		)
 
 		if err := composer.Run(); err != nil {
 			return err
@@ -172,6 +181,50 @@ var projectCI = &cobra.Command{
 	},
 }
 
+type ComposerAuth struct {
+	HTTPBasicAuth  *interface{}      `json:"http-basic,omitempty"`
+	BearerAuth     map[string]string `json:"bearer,omitempty"`
+	GitlabAuth     *interface{}      `json:"gitlab-token,omitempty"`
+	GithubOAuth    *interface{}      `json:"github-oauth,omitempty"`
+	BitbucketOauth *interface{}      `json:"bitbucket-oauth,omitempty"`
+}
+
+func prepareComposerAuth(ctx context.Context) (string, error) {
+	composerToken := os.Getenv("SHOPWARE_PACKAGES_TOKEN")
+
+	if composerToken == "" {
+		return "", nil
+	}
+
+	logging.FromContext(ctx).Infof("Setting up composer auth for packages.shopware.com")
+
+	composerAuth := os.Getenv("COMPOSER_AUTH")
+
+	var auth ComposerAuth
+
+	if composerAuth == "" {
+		auth = ComposerAuth{}
+	} else {
+		if err := json.Unmarshal([]byte(composerAuth), &auth); err != nil {
+			return "", err
+		}
+	}
+
+	if auth.BearerAuth == nil {
+		auth.BearerAuth = make(map[string]string)
+	}
+
+	auth.BearerAuth["packages.shopware.com"] = composerToken
+
+	data, err := json.Marshal(auth)
+
+	if err != nil {
+		return "", err
+	}
+
+	return string(data), nil
+}
+
 func init() {
 	projectRootCmd.AddCommand(projectCI)
 	projectCI.PersistentFlags().Bool("with-dev-dependencies", false, "Install dev dependencies")
diff --git a/wiki/docs/commands/project.md b/wiki/docs/commands/project.md
index 26c6987..2966f60 100644
--- a/wiki/docs/commands/project.md
+++ b/wiki/docs/commands/project.md
@@ -223,6 +223,9 @@ Flags:
 
 - `--with-dev-dependencies` - Install dev dependencies
 
+You can set `SHOPWARE_PACKAGES_TOKEN` as environment variable with the Shopware Composer Registry token,
+to pass it to the composer command.
+
 What that command does:
 
 - Installs all composer dependencies