diff --git a/sf_notifier/salesforce/client.py b/sf_notifier/salesforce/client.py
index 5adc691..ae265bc 100644
--- a/sf_notifier/salesforce/client.py
+++ b/sf_notifier/salesforce/client.py
@@ -47,6 +47,8 @@
     'sandbox_enabled': 'domain',
 }
 
+ALLOWED_HASHING = ('md5', 'sha256')
+
 logger = logging.getLogger(__name__)
 
 
@@ -75,11 +77,19 @@
         }
         self.session = requests.Session()
         self.config = self._validate_config(config)
+        self.hash_func = self._hash_func()
         self.environment = self.config.pop('environment_id')
         self._auth()
         self._registered_alerts = {}
 
     @staticmethod
+    def _hash_func():
+        name = os.environ.get('SF_NOTIFIER_ALERT_ID_HASH_FUNC', 'sha256')
+        if name in ALLOWED_HASHING:
+            return getattr(hashlib, name)
+        return hashlib.sha256
+
+    @staticmethod
     def _validate_config(config):
         kwargs = {}
 
@@ -115,12 +125,11 @@
         logger.info('Salesforce authentication successful.')
         self.metrics['sf_auth_ok'].set(1)
 
-    @staticmethod
-    def _get_alert_id(labels):
+    def _get_alert_id(self, labels):
         alert_id_data = ''
         for key in sorted(labels):
             alert_id_data += labels[key].replace(".", "\\.")
-        return hashlib.sha256(alert_id_data).hexdigest()
+        return self.hash_func(alert_id_data).hexdigest()
 
     @sf_auth_retry
     def _create_case(self, subject, body, labels, alert_id):
diff --git a/sf_notifier/server.py b/sf_notifier/server.py
index e9414bc..ba1017f 100644
--- a/sf_notifier/server.py
+++ b/sf_notifier/server.py
@@ -42,7 +42,10 @@
 
 @app.route('/info', methods=['GET'])
 def info():
-    return jsonify({'version': settings.VERSION})
+    return jsonify({
+        'version': settings.VERSION,
+        'hashing': sf_cli.hash_func.__name__
+    })
 
 
 @app.route('/hook', methods=['POST'])
diff --git a/sf_notifier/tests/test_client.py b/sf_notifier/tests/test_client.py
index b62eaa0..c6a2a2e 100644
--- a/sf_notifier/tests/test_client.py
+++ b/sf_notifier/tests/test_client.py
@@ -70,46 +70,3 @@
     assert SalesforceClient._validate_config(OK_CONFIG_2[0]) == OK_CONFIG_2[1]
     pytest.raises(SfNotifierError,
                   SalesforceClient._validate_config, WRONG_CONFIG)
-
-
-def test_alert_id_generate():
-    LABELS = {
-        'alertname': 'ApacheServiceDown',
-        'environment': 'testing_env',
-        'host': 'mdb01',
-        'instance': 'mdb01;telegraf',
-        'job': 'telegraf',
-        'region': 'region1',
-        'route': 'email,salesforce',
-        'service': 'apache',
-        'severity': 'minor'
-    }
-    SAME_LABELS = {
-        'environment': 'testing_env',
-        'service': 'apache',
-        'route': 'email,salesforce',
-        'instance': 'mdb01;telegraf',
-        'host': 'mdb01',
-        'severity': 'minor',
-        'region': 'region1',
-        'alertname': 'ApacheServiceDown',
-        'job': 'telegraf'
-    }
-    DIFF_LABELS = {
-        'environment': 'testing_env',
-        'service': 'apache',
-        'route': 'email,salesforce',
-        'instance': 'mdb01;telegraf',
-        'host': 'mdb01',
-        'severity': 'minor',
-        'region': 'region1',
-        'alertname': 'ApacheServiceDow',
-        'job': 'telegraf'
-    }
-
-    unset_env_vars()
-
-    alert_id = SalesforceClient._get_alert_id(LABELS)
-
-    assert alert_id == SalesforceClient._get_alert_id(SAME_LABELS)
-    assert alert_id != SalesforceClient._get_alert_id(DIFF_LABELS)