diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index b6c63ce5..438230e7 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -32,7 +32,7 @@ jobs:
         & $env:PGBIN\psql --username=scheduler --host=localhost --list timetable
 
     - name: Check out code
-      uses: actions/checkout@v4
+      uses: actions/checkout@v5
 
     - name: Set up Golang
       uses: actions/setup-go@v5
@@ -82,7 +82,7 @@ jobs:
         PGPASSWORD=somestrong psql --username=scheduler --host=localhost --list timetable
 
     - name: Check out code
-      uses: actions/checkout@v4
+      uses: actions/checkout@v5
 
     - name: Set up Golang
       uses: actions/setup-go@v5
@@ -115,7 +115,7 @@ jobs:
         PGPASSWORD=somestrong psql --username=scheduler --host=localhost --list timetable
 
     - name: Check out code
-      uses: actions/checkout@v4
+      uses: actions/checkout@v5
 
     - name: Set up Golang
       uses: actions/setup-go@v5
diff --git a/.github/workflows/codeql-analysis.yml b/.github/workflows/codeql-analysis.yml
index c16fa34b..5f47d082 100644
--- a/.github/workflows/codeql-analysis.yml
+++ b/.github/workflows/codeql-analysis.yml
@@ -43,7 +43,7 @@ jobs:
 
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v4
+      uses: actions/checkout@v5
 
     # Initializes the CodeQL tools for scanning.
     - name: Initialize CodeQL
diff --git a/.github/workflows/docker.yml b/.github/workflows/docker.yml
index 31055853..49e9762a 100644
--- a/.github/workflows/docker.yml
+++ b/.github/workflows/docker.yml
@@ -23,7 +23,7 @@ jobs:
     steps:
 
     - name: Check out code
-      uses: actions/checkout@v4
+      uses: actions/checkout@v5
 
     - name: Set up Golang
       uses: actions/setup-go@v5
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index b1795b56..d2e8336a 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -17,7 +17,7 @@ jobs:
         go-version: '1.24'
 
     - name: Check out code into the Go module directory
-      uses: actions/checkout@v4
+      uses: actions/checkout@v5
 
     - name: Unshallow
       run: git fetch --prune --unshallow
@@ -36,7 +36,7 @@ jobs:
     steps:
         
     - name: Check out code into the Go module directory
-      uses: actions/checkout@v4
+      uses: actions/checkout@v5
 
     - name: Version strings
       id: version