diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 0927320..3d71b46 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -5,6 +5,7 @@ on:
     branches:
       - main
   pull_request:
+  workflow_dispatch:
   schedule:
     - cron: '15 6 * * *'
 
diff --git a/.yamllint b/.yamllint
index fa1f1fc..10e554e 100644
--- a/.yamllint
+++ b/.yamllint
@@ -15,7 +15,8 @@ rules:
   commas:
     max-spaces-after: -1
     level: error
-  comments: disable
+  comments:
+    min-spaces-from-content: 1
   comments-indentation: disable
   document-start: disable
   empty-lines:
@@ -30,4 +31,8 @@ rules:
   new-lines:
     type: unix
   trailing-spaces: disable
-  truthy: disable
\ No newline at end of file
+  truthy: disable
+  octal-values:
+    forbid-implicit-octal: true
+    forbid-explicit-octal: true
+
diff --git a/README.md b/README.md
index 0cd3ba0..c5ee5cf 100644
--- a/README.md
+++ b/README.md
@@ -11,7 +11,7 @@ Collection to install and configure [Keycloak](https://www.keycloak.org/) or [Re
 <!--start requires_ansible-->
 ## Ansible version compatibility
 
-This collection has been tested against following Ansible versions: **>=2.14.0**.
+This collection has been tested against following Ansible versions: **>=2.15.0**.
 
 Plugins and modules within a collection may be tested with only specific Ansible versions. A collection may contain metadata that identifies these versions.
 <!--end requires_ansible-->
@@ -100,7 +100,7 @@ ansible-playbook -i <ansible_hosts> -e @rhn-creds.yml playbooks/keycloak.yml -e
   localhost ansible_connection=local
   ```
 
-Note: when deploying clustered configurations, all hosts belonging to the cluster must be present in ansible_play_batch; ie. they must be targeted by the same ansible-playbook execution.
+Note: when deploying clustered configurations, all hosts belonging to the cluster must be present in `ansible_play_batch`; ie. they must be targeted by the same ansible-playbook execution.
 
 
 ## Configuration
diff --git a/meta/runtime.yml b/meta/runtime.yml
index ce6befd..1e85b01 100644
--- a/meta/runtime.yml
+++ b/meta/runtime.yml
@@ -1,2 +1,2 @@
 ---
-requires_ansible: ">=2.14.0"
+requires_ansible: ">=2.15.0"
diff --git a/roles/keycloak/meta/main.yml b/roles/keycloak/meta/main.yml
index a70e9f1..a27afb8 100644
--- a/roles/keycloak/meta/main.yml
+++ b/roles/keycloak/meta/main.yml
@@ -12,7 +12,7 @@ galaxy_info:
 
   license: Apache License 2.0
 
-  min_ansible_version: "2.14"
+  min_ansible_version: "2.15"
 
   platforms:
     - name: EL
diff --git a/roles/keycloak/tasks/fastpackages.yml b/roles/keycloak/tasks/fastpackages.yml
index be34c72..a89f7f6 100644
--- a/roles/keycloak/tasks/fastpackages.yml
+++ b/roles/keycloak/tasks/fastpackages.yml
@@ -14,7 +14,7 @@
 
 - name: "Install packages: {{ packages_to_install }}"
   become: true
-  ansible.builtin.yum:
+  ansible.builtin.dnf:
     name: "{{ packages_to_install }}"
     state: present
   when:
diff --git a/roles/keycloak_quarkus/meta/main.yml b/roles/keycloak_quarkus/meta/main.yml
index 0f82003..40a487f 100644
--- a/roles/keycloak_quarkus/meta/main.yml
+++ b/roles/keycloak_quarkus/meta/main.yml
@@ -8,7 +8,7 @@ galaxy_info:
 
   license: Apache License 2.0
 
-  min_ansible_version: "2.14"
+  min_ansible_version: "2.15"
 
   platforms:
     - name: EL
diff --git a/roles/keycloak_realm/meta/main.yml b/roles/keycloak_realm/meta/main.yml
index 915f62c..ab861ed 100644
--- a/roles/keycloak_realm/meta/main.yml
+++ b/roles/keycloak_realm/meta/main.yml
@@ -8,7 +8,7 @@ galaxy_info:
 
   license: Apache License 2.0
 
-  min_ansible_version: "2.14"
+  min_ansible_version: "2.15"
 
   platforms:
     - name: EL