diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 8dad2aefdb3..d097e236fca 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -21,7 +21,7 @@ jobs:
       with:
         ruby-version: ${{ matrix.ruby-version }}
 
-    - uses: actions/cache@v2
+    - uses: actions/cache@v4
       with:
         path: vendor/bundle
         key: gems-${{ runner.os }}-${{ matrix.ruby-version }}-${{ hashFiles('**/Gemfile.lock') }}
diff --git a/.github/workflows/deploy.yml b/.github/workflows/deploy.yml
index 767f3c5e523..3bc6f6b9fe1 100644
--- a/.github/workflows/deploy.yml
+++ b/.github/workflows/deploy.yml
@@ -20,7 +20,7 @@ jobs:
       with:
         ruby-version: ${{ env.ruby-version }}
 
-    - uses: actions/cache@v2
+    - uses: actions/cache@v4
       with:
         path: vendor/bundle
         key: gems-${{ runner.os }}-${{ env.ruby-version }}-${{ hashFiles('**/Gemfile.lock') }}
diff --git a/.github/workflows/dev_deploy.yml b/.github/workflows/dev_deploy.yml
index 198640a174b..24252aba1c3 100644
--- a/.github/workflows/dev_deploy.yml
+++ b/.github/workflows/dev_deploy.yml
@@ -26,7 +26,7 @@ jobs:
 
     runs-on: ubuntu-latest
     env:
-      ruby-version: 2.5
+      ruby-version: 3.2
 
     steps:
     - uses: actions/checkout@v2
@@ -35,7 +35,7 @@ jobs:
       with:
         ruby-version: ${{ env.ruby-version }}
 
-    - uses: actions/cache@v2
+    - uses: actions/cache@v4
       with:
         path: vendor/bundle
         key: gems-${{ runner.os }}-${{ env.ruby-version }}-${{ hashFiles('**/Gemfile.lock') }}
diff --git a/data/checkins.json b/data/checkins.json
index de2af229a54..ca38189a48d 100644
--- a/data/checkins.json
+++ b/data/checkins.json
@@ -42,6 +42,13 @@
       "required": false,
       "parameter": true
     },
+    "ticket_slug": {
+      "description": "The `slug` of the ticket that was checked-in.",
+      "type": "string",
+      "read_only": false,
+      "required": false,
+      "parameter": true
+    },
     "deleted_at": {
       "description": "The date the checkin was deleted.",
       "type": "datetime",
diff --git a/source/includes/checkin_api/_checkins.md.erb b/source/includes/checkin_api/_checkins.md.erb
index 52a374b148b..7909ca21026 100644
--- a/source/includes/checkin_api/_checkins.md.erb
+++ b/source/includes/checkin_api/_checkins.md.erb
@@ -47,7 +47,7 @@ Create a new `Checkin` belonging to the given `CheckinList`.
 
 ### Parameters
 
-You must pass in one of either `ticket_id` or `ticket_reference`.
+You must pass in one of either `ticket_id`, `ticket_reference` or `ticket_slug`.
 
 <%= partial "includes/shared/parameters", locals: { parameters: data.checkins.attributes.select { |name,attribute| attribute["parameter"] } } %>