diff --git a/tasks/main.yml b/tasks/main.yml
index e8156c7..debbef2 100644
--- a/tasks/main.yml
+++ b/tasks/main.yml
@@ -60,7 +60,7 @@
     - dsa
   notify:
     - restart ssh
-  when: generate_ecdsa_too
+  when: generate_ecdsa_too|bool
 
 - name: Remove unwanted host keys
   become: yes
@@ -73,7 +73,7 @@
     - dsa
   notify:
     - restart ssh
-  when: not generate_ecdsa_too
+  when: not generate_ecdsa_too|bool
 
 - name: make sure the correct keys are available
   file:
diff --git a/vars/main.yml b/vars/main.yml
index ec25cbf..6997634 100644
--- a/vars/main.yml
+++ b/vars/main.yml
@@ -1,3 +1,3 @@
 ---
-playbook_version_number: 111
+playbook_version_number: 112
 playbook_version_path: '/etc/ansible-version/role-sshd_chaos-bodensee_github.com.version'