diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index e507169..1919c8b 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -50,6 +50,11 @@ repos:
         # Only run missing migration check if migration-generating files have changed:
         files: (.*/?(settings|migrations|models)/.+|.+models\.py|.+constants\.py|.+choices\.py|.+pyproject\.toml)
         pass_filenames: false
+      - id: check-packages-versions
+        name: check packages versions
+        entry: ./scripts/check_packages_versions.sh
+        language: script
+        files: ^(pyproject\.toml|frontend/package\.json)$
       - id: generate-openapi-schema
         name: generate OpenAPI schema
         entry: poetry run python manage.py generate_openapi_schema --output frontend/openapi_schema.json
diff --git a/scripts/check_packages_versions.sh b/scripts/check_packages_versions.sh
new file mode 100755
index 0000000..d775bac
--- /dev/null
+++ b/scripts/check_packages_versions.sh
@@ -0,0 +1,13 @@
+#!/bin/bash
+
+PYPROJECT_VERSION=$(grep '^version = ' pyproject.toml | awk -F'"' '{print $2}')
+PACKAGE_JSON_VERSION=$(grep '"version":' frontend/package.json | awk -F'"' '{print $4}')
+
+if [ "$PYPROJECT_VERSION" != "$PACKAGE_JSON_VERSION" ]; then
+  echo "Version mismatch: pyproject.toml ($PYPROJECT_VERSION) != frontend/package.json ($PACKAGE_JSON_VERSION)"
+  echo "The backend and the frontend are versioned together, that is, they should have the same version number."
+  echo "Please update the version number in both files to match."
+  exit 1
+fi
+
+echo "Versions match."