diff --git a/_multibuild b/_multibuild
index fcc7b97..49fb912 100644
--- a/_multibuild
+++ b/_multibuild
@@ -1,3 +1,3 @@
 <multibuild>
-  <package>test</package>
+  <flavor>test</flavor>
 </multibuild>
diff --git a/isort-5.6.1-gh.tar.gz b/isort-5.6.1-gh.tar.gz
deleted file mode 100644
index c45dda3..0000000
--- a/isort-5.6.1-gh.tar.gz
+++ /dev/null
@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:7f525efc733f5358e5fb5ffb2d36d3c9b848499f7698cfb410a2a41abf7a7c60
-size 635856
diff --git a/isort-5.6.4-gh.tar.gz b/isort-5.6.4-gh.tar.gz
new file mode 100644
index 0000000..a797105
--- /dev/null
+++ b/isort-5.6.4-gh.tar.gz
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:4018898c19c5e28797f64289c6286682ddc29eb49b4075866f6c63d8500eb7ab
+size 636779
diff --git a/python-isort.changes b/python-isort.changes
index 698c5a0..d141934 100644
--- a/python-isort.changes
+++ b/python-isort.changes
@@ -1,3 +1,24 @@
+-------------------------------------------------------------------
+Tue Oct 13 18:28:28 UTC 2020 - Benjamin Greiner <code@bnavigator.de>
+
+- Update to Version 5.6.4
+  * Fixed #1556: Empty line added between imports that should be 
+    skipped.
+- Version 5.6.3
+  * Improved packaging of test files alongside source distribution 
+    (see: https://github.com/PyCQA/isort/pull/1555).
+- Version 5.6.2
+  * Fixed #1548: On rare occasions an unecessary empty line can be 
+    added when an import is marked as skipped.
+  * Fixed #1542: Bug in VERTICAL_PREFIX_FROM_MODULE_IMPORT wrap 
+    mode.
+  * Fixed #1552: Pylama test dependent on source layout.
+  * Goal Zero: (Tickets related to aspirational goal of achieving 0 
+    regressions for remaining 5.0.0 lifespan):
+  * Zope added to integration test suite
+  * Additional testing of CLI (simulate unseekable streams)
+- now only requires poetry.core as PEP517 backend
+  
 -------------------------------------------------------------------
 Fri Oct  9 16:47:11 UTC 2020 - Benjamin Greiner <code@bnavigator.de>
 
diff --git a/python-isort.spec b/python-isort.spec
index 38db251..eeff7c2 100644
--- a/python-isort.spec
+++ b/python-isort.spec
@@ -27,15 +27,15 @@
 %endif
 %define skip_python2 1
 Name:           python-isort%{psuffix}
-Version:        5.6.1
+Version:        5.6.4
 Release:        0
 Summary:        A Python utility / library to sort Python imports
 License:        MIT
 URL:            https://pycqa.github.io/isort/
-# Data for tests are not packaged for PyPI, get them from Github
+# tests and example projects are not packaged for PyPI, get them from Github
 Source:         https://github.com/PyCQA/isort/archive/%{version}.tar.gz#/isort-%{version}-gh.tar.gz
 BuildRequires:  %{python_module pip}
-BuildRequires:  %{python_module poetry}
+BuildRequires:  %{python_module poetry-core}
 BuildRequires:  fdupes
 BuildRequires:  python-rpm-macros
 Requires:       python-setuptools
@@ -56,6 +56,7 @@ BuildRequires:  %{python_module libcst}
 BuildRequires:  %{python_module mock}
 BuildRequires:  %{python_module pip-api}
 BuildRequires:  %{python_module pipreqs}
+BuildRequires:  %{python_module poetry}
 BuildRequires:  %{python_module pylama}
 BuildRequires:  %{python_module pytest-mock}
 BuildRequires:  %{python_module pytest}