diff --git a/README.md b/README.md
index 1b08dac..8c6ae5c 100644
--- a/README.md
+++ b/README.md
@@ -158,6 +158,17 @@ For detailed instructions please see:
 </details>
 
 
+<details>
+  <summary>License and Copyright</summary>
+
+Source code for **kglab** plus its logo, documentation, and examples
+have an [MIT license](https://spdx.org/licenses/MIT.html) which is
+succinct and simplifies use in commercial applications.
+
+All materials herein are Copyright &copy; 2020-2022 Derwen, Inc.
+</details>
+
+
 <details>
   <summary>Attribution</summary>
 Please use the following BibTeX entry for citing **kglab** if you use
@@ -177,6 +188,7 @@ this library.
 ```
 </details>
 
+
 <img
  alt="illustration of a knowledge graph, plus laboratory glassware"
  src="https://raw.githubusercontent.com/DerwenAI/kglab/main/docs/assets/logo.png"
@@ -184,15 +196,6 @@ this library.
 />
 
 
-## License and Copyright
-
-Source code for **kglab** plus its logo, documentation, and examples
-have an [MIT license](https://spdx.org/licenses/MIT.html) which is
-succinct and simplifies use in commercial applications.
-
-All materials herein are Copyright &copy; 2020-2022 Derwen, Inc.
-
-
 ## Kudos
 
 Many thanks to our open source [sponsors](https://github.com/sponsors/ceteri);
@@ -228,4 +231,3 @@ and
  alt="kglab contributors"
  src="https://contributors-img.web.app/image?repo=derwenai/kglab"
 />
-
diff --git a/changelog.txt b/changelog.txt
index 55a3f96..cf437c4 100644
--- a/changelog.txt
+++ b/changelog.txt
@@ -2,10 +2,11 @@
 
 ## 0.6.1
 
-2022-04-??
+2022-04-20
 
   * automated RDF tests, coordinated with `Oxigraph`; kudos @Mec-iS, @Tpt
   * begin refactoring `KnowledgeGraph` as abstract classes, per #237
+  * update to Morph-KGC 2.0.0 and update links to the new documentation; kudos @ArenasGuerreroJulian
 
 
 ## 0.6.0
diff --git a/kglab/graph.py b/kglab/graph.py
index a2a30a3..6a46e26 100644
--- a/kglab/graph.py
+++ b/kglab/graph.py
@@ -55,8 +55,8 @@ def __init__ (
         self.__prefix: dict = {}
 
         self._tuples: list = []
-        self._node_names: np.array = np.empty(shape=[0, 1], dtype=object)
-        self._rel_names: np.array = np.empty(shape=[0, 1], dtype=object)
+        self._node_names: np.array = np.empty(shape=[0, 1], dtype=object)  # type: ignore
+        self._rel_names: np.array = np.empty(shape=[0, 1], dtype=object)  # type: ignore
 
 
 ######################################################################
@@ -101,7 +101,7 @@ def get_node_name (
 An accessor method to map from the `node_id` index of a node to its
 unique name.
         """
-        return self._node_names[node_id]
+        return self._node_names[node_id]  # type: ignore
 
 
     def get_rel_id (
@@ -131,7 +131,7 @@ def get_rel_name (
 An accessor method to map from the `rel_id` index of a relation to its
 unique name.
         """
-        return self._rel_names[rel_id]
+        return self._rel_names[rel_id]  # type: ignore
 
 
     def build_tuple (
diff --git a/kglab/kglab.py b/kglab/kglab.py
index 33c35c2..d7dd11d 100644
--- a/kglab/kglab.py
+++ b/kglab/kglab.py
@@ -835,7 +835,7 @@ def load_parquet (
 
         df.apply(
             lambda row: self._g.parse(
-                data="{} {} {} .".format(row[0], row[1], row[2]),
+                data=f"{ row[0] } { row[1] } { row[2] } .",
                 format="ttl",
             ),
             axis=1,
@@ -1211,11 +1211,12 @@ def unbind_sparql (
         sparql_meta, sparql_body = re.split(r"\s*WHERE\s*\{", sparql, maxsplit=1)
 
         for var in sorted(bindings.keys(), key=lambda x: len(x), reverse=True):  # pylint: disable=W0108
-            pattern = re.compile("(\?" + var + ")(\W)")  # pylint: disable=W1401
+            pattern = re.compile(r"(\?" + var + r")(\W)")  # pylint: disable=W1401
             bind_val = "<" + str(bindings[var]) + ">\\2"
             sparql_body = re.sub(pattern, bind_val, sparql_body)
 
-        return "".join([preamble, sparql_meta, " WHERE {", sparql_body]).strip()
+        result = "".join([preamble, sparql_meta, " WHERE {", sparql_body]).strip()
+        return result
 
 
     ######################################################################