diff --git a/.github/workflows/update_specimen.yml b/.github/workflows/update_specimen.yml
new file mode 100644
index 0000000..d8ab3c1
--- /dev/null
+++ b/.github/workflows/update_specimen.yml
@@ -0,0 +1,41 @@
+name: Update Specimen
+
+on:
+    workflow_dispatch: {}
+    schedule:
+        - cron: '0 12 * * *'
+
+jobs:
+    update:
+        runs-on: macOS-latest
+
+        steps:
+            - name: Checkout code
+              uses: actions/checkout@v2
+
+            - name: Set up Swift
+              uses: swift-actions/setup-swift@v2
+
+            - name: Update Specimen Data
+              id: compare_shas
+              run: |
+                swift build -c release
+                rm -rf ./Sources/EnkaDB/Resources/Specimen/ || true
+                .build/release/EnkaDBGenerator -HSR ./Sources/EnkaDB/Resources/Specimen/HSR/
+                .build/release/EnkaDBGenerator -GI ./Sources/EnkaDB/Resources/Specimen/GI/
+
+            - name: Create Pull Request
+              uses: peter-evans/create-pull-request@v3
+              with:
+                token: ${{ secrets.GITHUB_TOKEN }}
+                branch: update-specimen-${{ github.run_number }}
+                base: main
+                title: "Update Specimen"
+                body: |
+                  This PR updates the generated EnkaDB specimen.
+                delete-branch: true
+                assignees: ShikiSuen
+                reviewers: ShikiSuen
+                team-reviewers: |
+                  owners
+                  maintainers