diff --git a/muranoclient/common/utils.py b/muranoclient/common/utils.py
index 9ba9d7f2..de2ea155 100644
--- a/muranoclient/common/utils.py
+++ b/muranoclient/common/utils.py
@@ -353,18 +353,38 @@ class Package(FileWrapperMixin):
         except Exception:
             return []
 
+    @property
+    def resolvers(self):
+        if not hasattr(self, '_resolvers'):
+            self.classes
+        return self._resolvers
+
     @property
     def classes(self):
         if not hasattr(self, '_classes'):
             self._classes = {}
+            self._resolvers = {}
             for class_name, class_file in six.iteritems(
                     self.manifest.get('Classes', {})):
                 filename = "Classes/%s" % class_file
                 if filename not in self.contents.namelist():
                     continue
-                klass = yaml.load(self.contents.open(filename),
-                                  DummyYaqlYamlLoader)
-                self._classes[class_name] = klass
+                klass_list = yaml.load_all(self.contents.open(filename),
+                                           DummyYaqlYamlLoader)
+                if not klass_list:
+                    raise ValueError('No classes defined in file')
+                resolver = None
+                for klass in klass_list:
+                    ns = klass.get('Namespaces')
+                    if ns:
+                        resolver = NamespaceResolver(ns)
+                    name = klass.get('Name')
+                    if name and resolver:
+                        name = resolver.resolve_name(name)
+                    if name == class_name:
+                        self._classes[class_name] = klass
+                        self._resolvers[class_name] = resolver
+                        break
         return self._classes
 
     @property
@@ -669,3 +689,32 @@ def traverse_and_replace(obj,
                 _maybe_replace(obj, key, value)
     else:
         _maybe_replace(obj, key, value)
+
+
+class NamespaceResolver(object):
+    """Copied from main murano repo
+
+    original at murano/dsl/namespace_resolver.py
+    """
+
+    def __init__(self, namespaces):
+        self._namespaces = namespaces
+        self._namespaces[''] = ''
+
+    def resolve_name(self, name, relative=None):
+        if name is None:
+            raise ValueError()
+        if name and name.startswith(':'):
+            return name[1:]
+        if ':' in name:
+            parts = name.split(':')
+            if len(parts) != 2 or not parts[1]:
+                raise NameError('Incorrectly formatted name ' + name)
+            if parts[0] not in self._namespaces:
+                raise KeyError('Unknown namespace prefix ' + parts[0])
+            return '.'.join((self._namespaces[parts[0]], parts[1]))
+        if not relative and '=' in self._namespaces and '.' not in name:
+            return '.'.join((self._namespaces['='], name))
+        if relative and '.' not in name:
+            return '.'.join((relative, name))
+        return name
diff --git a/muranoclient/v1/artifact_packages.py b/muranoclient/v1/artifact_packages.py
index 7b082ab2..286819e7 100644
--- a/muranoclient/v1/artifact_packages.py
+++ b/muranoclient/v1/artifact_packages.py
@@ -52,7 +52,8 @@ class ArtifactRepo(object):
         for k, v in six.iteritems(kwargs):
             package_draft[k] = v
 
-        inherits = self._get_local_inheritance(package.classes)
+        inherits = self._get_local_inheritance(package.classes,
+                                               package.resolvers)
 
         package_draft['inherits'] = inherits
 
@@ -90,16 +91,16 @@ class ArtifactRepo(object):
         return self.client.artifacts.get(app_id)
 
     @staticmethod
-    def _get_local_inheritance(classes):
+    def _get_local_inheritance(classes, resolvers):
         result = {}
         for class_name, klass in six.iteritems(classes):
             if 'Extends' not in klass:
                 continue
             ns = klass.get('Namespaces')
             if ns:
-                resolver = NamespaceResolver(ns)
+                resolver = utils.NamespaceResolver(ns)
             else:
-                resolver = None
+                resolver = resolvers.get(class_name)
 
             if isinstance(klass['Extends'], list):
                 bases = klass['Extends']
@@ -337,32 +338,3 @@ class PackageWrapper(object):
                            {'pkg_name': self.name,
                             'attrs': ", ".join(missing_keys)})
         return {key: getattr(self, key) for key in keys}
-
-
-class NamespaceResolver(object):
-    """Copied from main murano repo
-
-    original at murano/dsl/namespace_resolver.py
-    """
-
-    def __init__(self, namespaces):
-        self._namespaces = namespaces
-        self._namespaces[''] = ''
-
-    def resolve_name(self, name, relative=None):
-        if name is None:
-            raise ValueError()
-        if name and name.startswith(':'):
-            return name[1:]
-        if ':' in name:
-            parts = name.split(':')
-            if len(parts) != 2 or not parts[1]:
-                raise NameError('Incorrectly formatted name ' + name)
-            if parts[0] not in self._namespaces:
-                raise KeyError('Unknown namespace prefix ' + parts[0])
-            return '.'.join((self._namespaces[parts[0]], parts[1]))
-        if not relative and '=' in self._namespaces and '.' not in name:
-            return '.'.join((self._namespaces['='], name))
-        if relative and '.' not in name:
-            return '.'.join((relative, name))
-        return name
diff --git a/releasenotes/notes/multi-class-yamls-support-914b3d155324214f.yaml b/releasenotes/notes/multi-class-yamls-support-914b3d155324214f.yaml
new file mode 100644
index 00000000..1d26c2fb
--- /dev/null
+++ b/releasenotes/notes/multi-class-yamls-support-914b3d155324214f.yaml
@@ -0,0 +1,4 @@
+---
+fixes:
+  - Fixed a bug when a package containing multi-class yamls could not be added
+    to glare-based catalog.