diff --git a/.github/workflows/oui_filepull.yml b/.github/workflows/oui_filepull.yml
index 35474317..aac03fc6 100644
--- a/.github/workflows/oui_filepull.yml
+++ b/.github/workflows/oui_filepull.yml
@@ -4,6 +4,7 @@ name: "OUI-Updates"
 on:   # yamllint disable-line rule:truthy
   schedule:
     - cron: "0 2 1 * *"
+  workflow_dispatch: {}
 
 jobs:
   data_gathering:
@@ -11,32 +12,51 @@ jobs:
     env:
       BRANCH_NAME: "OUI_Updates"
     steps:
-      # Checkout repo
       - name: "Check out code"
         uses: "actions/checkout@v4"
         with:
           ref: "develop"
-      # Delete old branch if it exists
+          fetch-depth: 0
+
+      - name: "Authenticate git remote"
+        env:
+          GITHUB_TOKEN: "${{ secrets.GITHUB_TOKEN }}"
+        run: |
+          git remote set-url origin "https://x-access-token:${GITHUB_TOKEN}@github.com/${GITHUB_REPOSITORY}.git"
+
       - name: "Delete existing branch"
-        run: "git branch -D $BRANCH_NAME || true"
-      # Create branch for Flatbot
-      - name: "Create Flatbot branch"
-        run: "git checkout -b $BRANCH_NAME"
-      # Push new branch so Flatbot can make its commit
-      - name: "Push Flatbot branch"
-        run: "git push -f --set-upstream origin $BRANCH_NAME"
-      # This step installs Deno, which is a new Javascript runtime that improves on Node. Can be used for an optional postprocessing step
-      - name: "Setup deno"
-        uses: "denoland/setup-deno@main"
-        with:
-          deno-version: "v1.10.x"
-      # The Flat Action step. We fetch the data in the http_url and save it as downloaded_filename
-      - name: "Fetch data"
-        uses: "githubocto/flat@v3"
-        with:
-          http_url: "https://standards-oui.ieee.org"
-          downloaded_filename: "./netutils/data_files/oui_mappings.py"
-          postprocess: "./flat_postprocess/oui_postprocess.ts"
+        run: |
+          git branch -D "$BRANCH_NAME" || true
+
+      - name: "Create branch"
+        run: |
+          git checkout -b "$BRANCH_NAME"
+
+      - name: "Push branch"
+        run: |
+          git push -f --set-upstream origin "$BRANCH_NAME"
+
+      # Fetch data via curl as IEEE has blocked requests/urllib library requests
+      - name: "Download IEEE OUI data"
+        run: |
+          curl -fsSL "https://standards-oui.ieee.org/oui/oui.csv" \
+            -o "./netutils/data_files/oui_mappings.py"
+
+      - name: "Generate oui_mappings.py"
+        run: "python ./flat_postprocess/oui_postprocess.py ./netutils/data_files/oui_mappings.py"
+
+      - name: "Commit changes"
+        run: |
+          git config user.name "github-actions[bot]"
+          git config user.email "github-actions[bot]@users.noreply.github.com"
+
+          git add ./netutils/data_files/oui_mappings.py
+          git diff --cached --quiet || git commit -m "Update OUI mappings"
+
+      - name: "Push changes"
+        run: |
+          git push origin "$BRANCH_NAME"
+
   pr_creation:
     runs-on: "ubuntu-latest"
     needs: "data_gathering"
diff --git a/changes/745.fixed b/changes/745.fixed
new file mode 100644
index 00000000..53f2c363
--- /dev/null
+++ b/changes/745.fixed
@@ -0,0 +1 @@
+Fix OUI GitHub Actions workflow to correctly fetch and generate OUI mappings
\ No newline at end of file
diff --git a/flat_postprocess/oui_postprocess.py b/flat_postprocess/oui_postprocess.py
index 0720f39b..19a905af 100644
--- a/flat_postprocess/oui_postprocess.py
+++ b/flat_postprocess/oui_postprocess.py
@@ -1,26 +1,46 @@
 """Python code used to postprocess Flat github action data related to OUI mappings."""
 
 import re
+import subprocess
 import sys
-from urllib.request import urlopen
 
-HEX_RE = r"^(?P<hex>[A-Fa-f0-9]{6})\s+\(.*\)[^a-zA-Z0-9]+(?P<company>.*)$"
+HEX_RE = r"^(?P<hex>[0-9A-Fa-f]{6})\s*\(base 16\)\s+(?P<company>.+?)\s*$"
+
 OUI_MAPPINGS = {}
+URL = "https://standards-oui.ieee.org/oui/oui.txt"
+
+
+def download_csv_text(url: str = URL) -> str:
+    """Download the CSV text from the given URL."""
+    proc = subprocess.run(  # noqa: S603
+        ["curl", "-fsSL", url],  # noqa: S607
+        check=True,
+        capture_output=True,
+        text=True,
+    )
+    return proc.stdout
+
 
 if __name__ == "__main__":
-    if len(sys.argv) == 3:
-        with urlopen("https://standards-oui.ieee.org").read().decode("utf-8") as oui_textfile:  # nosec B310
-            with open(sys.argv[1], "w", encoding="utf-8") as oui_mappings:
-                oui_mappings.write(oui_textfile)
+    if len(sys.argv) < 2:
+        raise SystemExit("Usage: python oui_postprocess.py <output_file> [<download_latest>]")
+
+    output_path = sys.argv[1]
+    download = "--download" in sys.argv[2:]
+
+    if download:
+        csv_text = download_csv_text(URL)
+        with open(output_path, "w", encoding="utf-8", newline="") as oui_textfile:
+            oui_textfile.write(csv_text)
 
-    with open(sys.argv[1], "r", encoding="utf-8") as oui_file:
+    with open(output_path, "r", encoding="utf-8", newline="") as oui_file:
         for line in oui_file:
             if re.search(HEX_RE, line):
                 group_regex_values = re.search(HEX_RE, line).groupdict()
                 if group_regex_values.get("hex") and group_regex_values.get("company"):
                     OUI_MAPPINGS.update({group_regex_values.get("hex").lower(): group_regex_values.get("company")})
 
-    with open(sys.argv[1], "w", encoding="utf-8") as oui_mappings:
+    with open(output_path, "w", encoding="utf-8") as oui_mappings:
         oui_mappings.write('"""Dictionary object to store OUI information."""\n')
         oui_mappings.write("# pylint: disable=too-many-lines\n")
         oui_mappings.write("import typing\n\n")