diff --git a/.github/workflows/main.linux.temurin.current.yml b/.github/workflows/main.linux.temurin.current.yml
index a8df65d..191e770 100644
--- a/.github/workflows/main.linux.temurin.current.yml
+++ b/.github/workflows/main.linux.temurin.current.yml
@@ -10,16 +10,16 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - name: JDK
-        uses: actions/setup-java@v3
+        uses: actions/setup-java@v4
         with:
           java-version: 22
           distribution: 'temurin'
       - name: Build
         run: mvn --errors clean verify site
       - name: Upload test logs
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         if: always()
         with:
           name: test-logs
diff --git a/.github/workflows/main.linux.temurin.lts.yml b/.github/workflows/main.linux.temurin.lts.yml
index 97f2f03..8bf9411 100644
--- a/.github/workflows/main.linux.temurin.lts.yml
+++ b/.github/workflows/main.linux.temurin.lts.yml
@@ -10,21 +10,21 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - name: JDK
-        uses: actions/setup-java@v3
+        uses: actions/setup-java@v4
         with:
           java-version: 21
           distribution: 'temurin'
       - name: Build
         run: mvn --errors clean verify site
       - name: Upload test logs
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         if: always()
         with:
           name: test-logs
           path: ./com.io7m.modulechaser.tests/target/surefire-reports
       - name: Coverage
-        uses: codecov/codecov-action@v1
+        uses: codecov/codecov-action@v4
         with:
           file: com.io7m.modulechaser.tests/target/site/jacoco-aggregate/jacoco.xml
diff --git a/.github/workflows/main.windows.temurin.current.yml b/.github/workflows/main.windows.temurin.current.yml
index c4376f7..ee9c206 100644
--- a/.github/workflows/main.windows.temurin.current.yml
+++ b/.github/workflows/main.windows.temurin.current.yml
@@ -10,16 +10,16 @@ jobs:
   build:
     runs-on: windows-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - name: JDK
-        uses: actions/setup-java@v3
+        uses: actions/setup-java@v4
         with:
           java-version: 22
           distribution: 'temurin'
       - name: Build
         run: mvn --errors clean verify site
       - name: Upload test logs
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         if: always()
         with:
           name: test-logs
diff --git a/.github/workflows/main.windows.temurin.lts.yml b/.github/workflows/main.windows.temurin.lts.yml
index bdb30cc..3273d64 100644
--- a/.github/workflows/main.windows.temurin.lts.yml
+++ b/.github/workflows/main.windows.temurin.lts.yml
@@ -10,16 +10,16 @@ jobs:
   build:
     runs-on: windows-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - name: JDK
-        uses: actions/setup-java@v3
+        uses: actions/setup-java@v4
         with:
           java-version: 21
           distribution: 'temurin'
       - name: Build
         run: mvn --errors clean verify site
       - name: Upload test logs
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         if: always()
         with:
           name: test-logs