diff --git a/.github/workflows/coding-standard.yml b/.github/workflows/coding-standard.yml
index ccd5f45..6120f64 100644
--- a/.github/workflows/coding-standard.yml
+++ b/.github/workflows/coding-standard.yml
@@ -12,7 +12,7 @@ jobs:
       fail-fast: false
       matrix:
         operating-system: [ubuntu-latest, windows-latest, macOS-latest]
-        php-versions: ["8.2", "8.3"]
+        php-versions: ["8.2", "8.3", "8.4"]
 
     steps:
       - name: Set git to use LF
diff --git a/.github/workflows/mutation-tests.yml b/.github/workflows/mutation-tests.yml
index 5df8b8b..bb8352e 100644
--- a/.github/workflows/mutation-tests.yml
+++ b/.github/workflows/mutation-tests.yml
@@ -12,7 +12,7 @@ jobs:
       fail-fast: false
       matrix:
         operating-system: [ubuntu-latest]
-        php-versions: ["8.2", "8.3"]
+        php-versions: ["8.2", "8.3", "8.4"]
 
     steps:
       - name: Set git to use LF
diff --git a/.github/workflows/static-analysis.yml b/.github/workflows/static-analysis.yml
index b280b6c..185fdbb 100644
--- a/.github/workflows/static-analysis.yml
+++ b/.github/workflows/static-analysis.yml
@@ -12,7 +12,7 @@ jobs:
       fail-fast: false
       matrix:
         operating-system: [ubuntu-latest, windows-latest, macOS-latest]
-        php-versions: ["8.2", "8.3"]
+        php-versions: ["8.2", "8.3", "8.4"]
 
     steps:
       - name: Set git to use LF
diff --git a/.github/workflows/testing.yml b/.github/workflows/testing.yml
index 08403c3..c5e55c8 100644
--- a/.github/workflows/testing.yml
+++ b/.github/workflows/testing.yml
@@ -12,7 +12,7 @@ jobs:
       fail-fast: false
       matrix:
         operating-system: [ubuntu-latest, windows-latest, macOS-latest]
-        php-versions: ["8.2", "8.3"]
+        php-versions: ["8.2", "8.3", "8.4"]
 
     steps:
       - name: Set git to use LF