diff --git a/.github/workflows/openmetrics.yml b/.github/workflows/openmetrics.yml
index 41fc46ad..4d74c839 100644
--- a/.github/workflows/openmetrics.yml
+++ b/.github/workflows/openmetrics.yml
@@ -17,8 +17,7 @@ jobs:
         python-version: "3.12.3"
     - name: Install dependencies
       run: |
-        python -m pip install --upgrade pip
-        pip install abnf
+        pip install -r scripts/check_openmetrics_spec_requirements.txt
     - name: Check ABNF for OpenMetrics 2.0
       run: |
         python3 scripts/check_openmetrics_spec.py docs/specs/om/open_metrics_spec_2_0.md
diff --git a/scripts/check_openmetrics_spec_requirements.txt b/scripts/check_openmetrics_spec_requirements.txt
new file mode 100644
index 00000000..ecc186d6
--- /dev/null
+++ b/scripts/check_openmetrics_spec_requirements.txt
@@ -0,0 +1 @@
+-e git+https://github.com/declaresub/abnf.git@6dc48bc44219e523c2a21ec7a09c104d991b09d0#egg=abnf # 2.3.1