diff --git a/.github/workflows/auto_changelog.yml b/.github/workflows/auto_changelog.yml
index 3feaaf87c23..37dc7d2e054 100644
--- a/.github/workflows/auto_changelog.yml
+++ b/.github/workflows/auto_changelog.yml
@@ -14,7 +14,7 @@ jobs:
     if: github.event.pull_request.merged == true
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: Generate App Token
         id: app-token-generation
diff --git a/.github/workflows/autowiki.yml b/.github/workflows/autowiki.yml
index b022eda4ea4..2f6cadbbf92 100644
--- a/.github/workflows/autowiki.yml
+++ b/.github/workflows/autowiki.yml
@@ -20,7 +20,7 @@ jobs:
           echo "SECRETS_ENABLED=$SECRET_EXISTS" >> $GITHUB_OUTPUT
       - name: Checkout
         if: steps.secrets_set.outputs.SECRETS_ENABLED
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
       - name: Install BYOND
         if: steps.secrets_set.outputs.SECRETS_ENABLED
         uses: ./.github/actions/restore_or_install_byond
diff --git a/.github/workflows/codeowner_reviews.yml b/.github/workflows/codeowner_reviews.yml
index 8ebaed36a53..cc5d8e8a20e 100644
--- a/.github/workflows/codeowner_reviews.yml
+++ b/.github/workflows/codeowner_reviews.yml
@@ -12,7 +12,7 @@ jobs:
 
     steps:
       # Checks-out your repository under $GITHUB_WORKSPACE, so the job can access it
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
 
       #Parse the Codeowner file on non draft PRs
       - name: CodeOwnersParser
diff --git a/.github/workflows/collect_data.yml b/.github/workflows/collect_data.yml
index dba143f0e05..b82575bfd87 100644
--- a/.github/workflows/collect_data.yml
+++ b/.github/workflows/collect_data.yml
@@ -27,7 +27,7 @@ jobs:
       required_build_versions: ${{ steps.setup_required_build_versions.outputs.required_build_versions }}
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - name: Find Maps
         id: map_finder
         run: |
diff --git a/.github/workflows/compare_screenshots.yml b/.github/workflows/compare_screenshots.yml
index b0c02450829..f899e5e4b5c 100644
--- a/.github/workflows/compare_screenshots.yml
+++ b/.github/workflows/compare_screenshots.yml
@@ -8,7 +8,7 @@ jobs:
     timeout-minutes: 15
     runs-on: ubuntu-22.04
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - name: Setup directory
         run: mkdir -p artifacts
       # If we ever add more artifacts, this is going to break, but it'll be obvious.
diff --git a/.github/workflows/compile_all_maps.yml b/.github/workflows/compile_all_maps.yml
index 52812005185..2512d5fa979 100644
--- a/.github/workflows/compile_all_maps.yml
+++ b/.github/workflows/compile_all_maps.yml
@@ -14,7 +14,7 @@ jobs:
     timeout-minutes: 5
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - name: Setup Bun
         uses: ./.github/actions/setup_bun
       - name: Restore BYOND from Cache
@@ -35,7 +35,7 @@ jobs:
     timeout-minutes: 5
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - name: Setup Bun
         uses: ./.github/actions/setup_bun
       - name: Restore BYOND from Cache
diff --git a/.github/workflows/compile_changelogs.yml b/.github/workflows/compile_changelogs.yml
index 01fcb6f7f0e..eae668d4a4e 100644
--- a/.github/workflows/compile_changelogs.yml
+++ b/.github/workflows/compile_changelogs.yml
@@ -35,7 +35,7 @@ jobs:
 
       - name: "Checkout"
         if: steps.value_holder.outputs.ACTIONS_ENABLED
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
         with:
           fetch-depth: 25
           persist-credentials: false
diff --git a/.github/workflows/discord_discussions.yml b/.github/workflows/discord_discussions.yml
index 439315cbb95..7f894fa18ca 100644
--- a/.github/workflows/discord_discussions.yml
+++ b/.github/workflows/discord_discussions.yml
@@ -34,7 +34,7 @@ jobs:
           dotnet-quality: ga
 
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: Build Tgstation.DiscordDiscussions
         run: dotnet publish -c Release -o discord_discussions_bins tools/Tgstation.DiscordDiscussions/Tgstation.DiscordDiscussions.csproj
diff --git a/.github/workflows/gbp.yml b/.github/workflows/gbp.yml
index 62e7dbec7db..4931252e962 100644
--- a/.github/workflows/gbp.yml
+++ b/.github/workflows/gbp.yml
@@ -12,7 +12,7 @@ jobs:
       issues: write # to apply labels
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
       - name: Run Auto Labeler
         uses: actions/github-script@v7
         with:
@@ -40,7 +40,7 @@ jobs:
           echo "ACTIONS_ENABLED=$SECRET_EXISTS" >> $GITHUB_OUTPUT
       - name: Checkout
         if: steps.value_holder.outputs.ACTIONS_ENABLED
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
       - name: Setup git
         if: steps.value_holder.outputs.ACTIONS_ENABLED
         run: |
@@ -48,7 +48,7 @@ jobs:
           git config --global user.email "<>"
       - name: Checkout alternate branch
         if: steps.value_holder.outputs.ACTIONS_ENABLED
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
         with:
           ref: "gbp-balances" # The branch name
           path: gbp-balances
diff --git a/.github/workflows/gbp_collect.yml b/.github/workflows/gbp_collect.yml
index 644595e1336..1e83e860ab7 100644
--- a/.github/workflows/gbp_collect.yml
+++ b/.github/workflows/gbp_collect.yml
@@ -18,7 +18,7 @@ jobs:
           echo "ACTIONS_ENABLED=$SECRET_EXISTS" >> $GITHUB_OUTPUT
       - name: Checkout
         if: steps.value_holder.outputs.ACTIONS_ENABLED
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
       - name: Setup git
         if: steps.value_holder.outputs.ACTIONS_ENABLED
         run: |
@@ -26,7 +26,7 @@ jobs:
           git config --global user.email "41898282+github-actions[bot]@users.noreply.github.com"
       - name: Checkout alternate branch
         if: steps.value_holder.outputs.ACTIONS_ENABLED
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
         with:
           ref: "gbp-balances" # The branch name
           path: gbp-balances
diff --git a/.github/workflows/generate_documentation.yml b/.github/workflows/generate_documentation.yml
index 79c6f180ffe..79dc2593681 100644
--- a/.github/workflows/generate_documentation.yml
+++ b/.github/workflows/generate_documentation.yml
@@ -13,7 +13,7 @@ jobs:
     runs-on: ubuntu-22.04
     concurrency: gen-docs
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - name: Setup cache
         uses: actions/cache@v4
         with:
diff --git a/.github/workflows/remove_guide_comments.yml b/.github/workflows/remove_guide_comments.yml
index 2c65239133f..4bbc0c60251 100644
--- a/.github/workflows/remove_guide_comments.yml
+++ b/.github/workflows/remove_guide_comments.yml
@@ -9,7 +9,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
       - name: Remove guide comments
         uses: actions/github-script@v7
         with:
diff --git a/.github/workflows/rerun_flaky_tests.yml b/.github/workflows/rerun_flaky_tests.yml
index b7313767f4d..fc9238bcf02 100644
--- a/.github/workflows/rerun_flaky_tests.yml
+++ b/.github/workflows/rerun_flaky_tests.yml
@@ -10,7 +10,7 @@ jobs:
     if: ${{ github.event.workflow_run.conclusion == 'failure' && github.event.workflow_run.run_attempt == 1 }}
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
       - name: Rerun flaky tests
         uses: actions/github-script@v7
         with:
@@ -22,7 +22,7 @@ jobs:
     if: ${{ github.event.workflow_run.conclusion == 'success' && github.event.workflow_run.run_attempt == 2 }}
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
       - name: Report flaky tests
         uses: actions/github-script@v7
         with:
diff --git a/.github/workflows/run_integration_tests.yml b/.github/workflows/run_integration_tests.yml
index c61d3238aa1..3e7a052781d 100644
--- a/.github/workflows/run_integration_tests.yml
+++ b/.github/workflows/run_integration_tests.yml
@@ -29,7 +29,7 @@ jobs:
     runs-on: ubuntu-latest
     timeout-minutes: 15
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - name: Restore BYOND from Cache
         uses: ./.github/actions/restore_or_install_byond
         with:
diff --git a/.github/workflows/run_linters.yml b/.github/workflows/run_linters.yml
index 294286722cd..81c963c25ed 100644
--- a/.github/workflows/run_linters.yml
+++ b/.github/workflows/run_linters.yml
@@ -9,7 +9,7 @@ jobs:
     timeout-minutes: 5
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - name: Restore SpacemanDMM cache
         uses: actions/cache@v4
         with:
diff --git a/.github/workflows/setup_build_artifact.yml b/.github/workflows/setup_build_artifact.yml
index a6a6a94068b..aaf4cfb4553 100644
--- a/.github/workflows/setup_build_artifact.yml
+++ b/.github/workflows/setup_build_artifact.yml
@@ -14,7 +14,7 @@ jobs:
     runs-on: ubuntu-22.04
     timeout-minutes: 5
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - name: Setup Bun
         uses: ./.github/actions/setup_bun
       - name: Restore BYOND from Cache
diff --git a/.github/workflows/show_screenshot_test_results.yml b/.github/workflows/show_screenshot_test_results.yml
index b48ca983b35..6901e1d1d17 100644
--- a/.github/workflows/show_screenshot_test_results.yml
+++ b/.github/workflows/show_screenshot_test_results.yml
@@ -25,7 +25,7 @@ jobs:
           echo "SECRETS_ENABLED=$SECRET_EXISTS" >> $GITHUB_OUTPUT
       - name: Checkout
         if: steps.secrets_set.outputs.SECRETS_ENABLED
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
       - name: Prepare module
         if: steps.secrets_set.outputs.SECRETS_ENABLED
         run: |
diff --git a/.github/workflows/test_merge_bot.yml b/.github/workflows/test_merge_bot.yml
index 00f6bd19cb5..101c3ad2b32 100644
--- a/.github/workflows/test_merge_bot.yml
+++ b/.github/workflows/test_merge_bot.yml
@@ -23,7 +23,7 @@ jobs:
           echo "GET_TEST_MERGES_URL=$SECRET_EXISTS" >> $GITHUB_OUTPUT
       - name: Checkout
         if: steps.secrets_set.outputs.GET_TEST_MERGES_URL
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
       - name: Prepare module
         if: steps.secrets_set.outputs.GET_TEST_MERGES_URL
         run: |
diff --git a/.github/workflows/tgs_test.yml b/.github/workflows/tgs_test.yml
index 466d4ee86cd..6c689ae7d1a 100644
--- a/.github/workflows/tgs_test.yml
+++ b/.github/workflows/tgs_test.yml
@@ -64,7 +64,7 @@ jobs:
           dotnet-version: 8.0.x
 
       - name: Checkout Repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: Test TGS Integration
         run: dotnet run -c Release --project tools/tgs_test ${{ github.repository }} /tgs_instances/tgstation ${{ env.TGS_API_PORT }} ${{ github.event.pull_request.head.sha || github.sha }} ${{ secrets.GITHUB_TOKEN }} ${{ env.PR_NUMBER }}
diff --git a/.github/workflows/update_tgs_dmapi.yml b/.github/workflows/update_tgs_dmapi.yml
index 977a8affc52..885ac26c839 100644
--- a/.github/workflows/update_tgs_dmapi.yml
+++ b/.github/workflows/update_tgs_dmapi.yml
@@ -14,7 +14,7 @@ jobs:
       pull-requests: write
     steps:
       - name: Clone
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: Branch
         run: |