diff --git a/.github/workflows/cargo.yml b/.github/workflows/cargo.yml
index 0864164..45a7bce 100644
--- a/.github/workflows/cargo.yml
+++ b/.github/workflows/cargo.yml
@@ -21,7 +21,7 @@ jobs:
   checks-with-ci-repo:
     runs-on: ubuntu-20.04
     container:
-      image: fedora:39  # CURRENT DEVELOPMENT ENVIRONMENT
+      image: fedora:40  # CURRENT DEVELOPMENT ENVIRONMENT
     steps:
       - uses: actions/checkout@v4
       - name: Install dependencies for Fedora
diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 4124370..6a0154b 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -66,7 +66,7 @@ jobs:
   yamllint:
     runs-on: ubuntu-20.04
     container:
-      image: fedora:39  # CURRENT DEVELOPMENT ENVIRONMENT
+      image: fedora:40  # CURRENT DEVELOPMENT ENVIRONMENT
     steps:
       - uses: actions/checkout@v4
       - name: Install dependencies for Fedora
diff --git a/.github/workflows/nightly.yml b/.github/workflows/nightly.yml
index 64ea949..12645f3 100644
--- a/.github/workflows/nightly.yml
+++ b/.github/workflows/nightly.yml
@@ -42,7 +42,7 @@ jobs:
   checks-with-ci-repo:
     runs-on: ubuntu-20.04
     container:
-      image: fedora:39  # CURRENT DEVELOPMENT ENVIRONMENT
+      image: fedora:40  # CURRENT DEVELOPMENT ENVIRONMENT
     steps:
       - uses: actions/checkout@v4
       - name: Install dependencies for Fedora