diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 77c6d41..9dcacf3 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -12,7 +12,9 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
+        with:
+          submodules: true
       - name: Set up Python 3.x
         uses: actions/setup-python@v5
         with:
@@ -20,5 +22,7 @@ jobs:
           python-version: '3.x'
       - name: Install dependencies
         run: pip install -r requirements.txt
+      - name: Build and install eth-specs
+        run: ./install-eth-specs.sh
       - name: Run tests
         run: python -m unittest
diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..b02051b
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,4 @@
+[submodule "consensus-specs"]
+	path = eth-specs
+	url = git@github.com:ethereum/consensus-specs.git
+	branch = dev
diff --git a/eth-specs b/eth-specs
new file mode 160000
index 0000000..ae3ef6f
--- /dev/null
+++ b/eth-specs
@@ -0,0 +1 @@
+Subproject commit ae3ef6f330846cae283e7748f423ce54128ef6d4
diff --git a/install-eth-specs.sh b/install-eth-specs.sh
new file mode 100755
index 0000000..fd9c479
--- /dev/null
+++ b/install-eth-specs.sh
@@ -0,0 +1,5 @@
+#!/usr/bin/env bash
+cd ./eth-specs
+pip install -r requirements_preinstallation.txt
+python setup.py sdist bdist_wheel
+pip install dist/*.whl
\ No newline at end of file