diff --git a/.github/workflows/dependencies_check.yml b/.github/workflows/dependencies_check.yml
new file mode 100644
index 00000000..54930af8
--- /dev/null
+++ b/.github/workflows/dependencies_check.yml
@@ -0,0 +1,27 @@
+---
+name: Dependencies Check
+on:
+  pull_request:
+    types:
+      - opened
+      - reopened
+      - synchronize
+    paths:
+      - pyproject.toml
+      - requirements.txt
+      - scripts/check_deps.py
+
+jobs:
+  test:
+    name: Check dependencies sync between pyproject.toml and requirements.txt
+    runs-on: ubuntu-22.04
+    steps:
+      - uses: actions/checkout@master
+      - name: Set up Python 3.13
+        uses: actions/setup-python@v4
+        with:
+          python-version: 3.13
+      - name: Install dependencies
+        run: python -m pip install --upgrade tomli
+      - name: Run script
+        run: python3 bin/check_deps.py
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8c7ef78c..868696dc 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,7 +7,9 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 
 ## \[Unreleased\]
 
-- Nothing yet.
+### Fixed
+
+- Updated pyproject.toml dependencies. Thanks, @kkorlyak ([#244](https://github.com/amplify-education/python-hcl2/pull/244))
 
 ## \[7.3.0\] - 2025-07-23
 
diff --git a/bin/check_deps.py b/bin/check_deps.py
new file mode 100644
index 00000000..55e7e098
--- /dev/null
+++ b/bin/check_deps.py
@@ -0,0 +1,54 @@
+"""Used by dependencies_check.yml to verify if dependencies between pyproject.yml and requirements.txt are in sync"""
+import sys
+from typing import Set
+import difflib
+import tomli
+
+
+def get_pyproject_deps() -> Set[str]:
+    with open("pyproject.toml", "rb") as f:
+        pyproject_data = tomli.load(f)
+    return set(pyproject_data.get("project", {}).get("dependencies", set()))
+
+
+def get_requirements_deps() -> Set[str]:
+    result = set()
+    with open("requirements.txt", "r") as f:
+        for line in f:
+            line = line.strip()
+            if line and not line.startswith("#"):
+                result.add(line)
+    return result
+
+
+def main():
+
+    pyproject_deps = get_pyproject_deps()
+    requirements_deps = get_requirements_deps()
+
+    pyproject_lines = list(sorted(pyproject_deps))
+
+    if pyproject_deps == requirements_deps:
+        print("All dependencies are in sync:")
+        for line in pyproject_lines:
+            print(line)
+        sys.exit(0)
+
+    print("Failed, dependencies mismatch:")
+    requirements_lines = list(sorted(requirements_deps))
+
+    diff = difflib.unified_diff(
+        pyproject_lines,
+        requirements_lines,
+        fromfile="pyproject.toml",
+        tofile="requirements.txt",
+        lineterm="",
+    )
+    for line in diff:
+        print(line)
+
+    sys.exit(1)
+
+
+if __name__ == "__main__":
+    main()
diff --git a/pyproject.toml b/pyproject.toml
index e4d3baf9..4440461a 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -25,7 +25,11 @@ classifiers = [
     "Programming Language :: Python :: 3.13",
 ]
 requires-python = ">=3.7.0"
-dependencies = ["lark>=1,<2"]
+
+dependencies = [
+    "lark>=1.1.5,<2.0",
+    "regex>=2024.4.16"
+]
 dynamic = ["version"]
 
 [project.readme]