diff --git a/iib/workers/tasks/fbc_utils.py b/iib/workers/tasks/fbc_utils.py
index 75dc7246..bbe99eeb 100644
--- a/iib/workers/tasks/fbc_utils.py
+++ b/iib/workers/tasks/fbc_utils.py
@@ -8,6 +8,7 @@
 
 import ruamel.yaml
 from typing import Tuple
+
 from iib.exceptions import IIBError
 from iib.workers.config import get_worker_config
 from iib.common.tracing import instrument_tracing
@@ -85,12 +86,15 @@ def merge_catalogs_dirs(src_config: str, dest_config: str):
     :param str src_config: source config directory
     :param str dest_config: destination config directory
     """
+    from iib.workers.tasks.opm_operations import opm_validate
+
     for conf_dir in (src_config, dest_config):
         if not os.path.isdir(conf_dir):
             msg = f"config directory does not exist: {conf_dir}"
             log.error(msg)
             raise IIBError(msg)
         enforce_json_config_dir(conf_dir)
+        opm_validate(conf_dir)
 
     log.info("Merging config folders: %s to %s", src_config, dest_config)
     shutil.copytree(src_config, dest_config, dirs_exist_ok=True)
diff --git a/iib/workers/tasks/opm_operations.py b/iib/workers/tasks/opm_operations.py
index b0eb234a..fcb91e5b 100644
--- a/iib/workers/tasks/opm_operations.py
+++ b/iib/workers/tasks/opm_operations.py
@@ -1144,3 +1144,17 @@ def set_opm_version(cls, from_index: Optional[str] = None):
         if index_version in opm_versions_config:
             Opm.opm_version = opm_versions_config.get(index_version)
         log.info("OPM version set to %s", Opm.opm_version)
+
+
+def opm_validate(config_dir: str) -> None:
+    """
+    Validate the declarative config files in a given directory.
+
+    :param str config_dir: directory containing the declarative config files.
+    :raises IIBError: if the validation fails
+    """
+    from iib.workers.tasks.utils import run_cmd
+
+    log.debug("Validating JSON files under %s", config_dir)
+    cmd = ['opm', 'validate', config_dir]
+    run_cmd(cmd, exc_msg=f'Failed to validate the content from config_dir {config_dir}')
diff --git a/tests/test_workers/test_tasks/test_fbc_utils.py b/tests/test_workers/test_tasks/test_fbc_utils.py
index cab419b8..dc838448 100644
--- a/tests/test_workers/test_tasks/test_fbc_utils.py
+++ b/tests/test_workers/test_tasks/test_fbc_utils.py
@@ -102,8 +102,9 @@ def test_is_image_fbc(mock_si, skopeo_output, is_fbc):
     assert is_image_fbc(image) is is_fbc
 
 
+@mock.patch('iib.workers.tasks.utils.run_cmd')
 @mock.patch("iib.workers.tasks.fbc_utils.enforce_json_config_dir")
-def test_merge_catalogs_dirs(mock_enforce_json, tmpdir):
+def test_merge_catalogs_dirs(mock_enforce_json, mock_rc, tmpdir):
     source_dir = os.path.join(tmpdir, 'src')
     destination_dir = os.path.join(tmpdir, 'dst')
     os.makedirs(destination_dir, exist_ok=True)
@@ -121,6 +122,18 @@ def test_merge_catalogs_dirs(mock_enforce_json, tmpdir):
             mock.call(destination_dir),
         ]
     )
+    mock_rc.assert_has_calls(
+        [
+            mock.call(
+                ['opm', 'validate', source_dir],
+                exc_msg=f'Failed to validate the content from config_dir {source_dir}',
+            ),
+            mock.call(
+                ['opm', 'validate', destination_dir],
+                exc_msg=f'Failed to validate the content from config_dir {destination_dir}',
+            ),
+        ]
+    )
 
     for r, d, f in os.walk(source_dir):