diff --git a/roles/codimd/handlers/main.yml b/roles/codimd/handlers/main.yml
index 49d9031..4dccff2 100644
--- a/roles/codimd/handlers/main.yml
+++ b/roles/codimd/handlers/main.yml
@@ -4,7 +4,7 @@
   command: npm run build
   args:
     chdir: /var/local/codimd/codimd
-  become: yes
+  become: true
   become_user: codimd
 
 # Reload systemd daemons when a service file changes
diff --git a/roles/codimd/tasks/main.yml b/roles/codimd/tasks/main.yml
index 6e88490..051248d 100644
--- a/roles/codimd/tasks/main.yml
+++ b/roles/codimd/tasks/main.yml
@@ -12,7 +12,7 @@
 #     repo: https://github.com/hackmdio/codimd.git
 #     dest: /var/local/codimd/codimd
 #     version: 1.2.1
-#   become: yes
+#   become: true
 #   become_user: codimd
 #   notify: Build front-end for CodiMD
 
@@ -21,7 +21,7 @@
   command: bin/setup
   args:
     chdir: /var/local/codimd/codimd
-  become: yes
+  become: true
   become_user: codimd
 
 # Connection to database
@@ -38,7 +38,7 @@
   command: node_modules/.bin/sequelize db:migrate
   args:
     chdir: /var/local/codimd/codimd
-  become: yes
+  become: true
   become_user: codimd
 
 # Configure