diff --git a/environment.yml b/environment.yml
index 711b293..448c3be 100644
--- a/environment.yml
+++ b/environment.yml
@@ -9,4 +9,4 @@ dependencies:
  - scikit-learn>=0.21
  - trackpy
  - numpy>=1.16.5
- - pyqt>=5.14.0
+ - pyqt>=5.14.0,<6.0
diff --git a/particlespy/tests/test_particle_clustering.py b/particlespy/tests/test_particle_clustering.py
index 7a72700..daca2e4 100644
--- a/particlespy/tests/test_particle_clustering.py
+++ b/particlespy/tests/test_particle_clustering.py
@@ -1,6 +1,5 @@
 import random
 from pathlib import Path
-
 import hyperspy.api as hs
 import numpy as np
 from particlespy import api as ps
diff --git a/setup.py b/setup.py
index d7e43d3..980680f 100644
--- a/setup.py
+++ b/setup.py
@@ -8,12 +8,12 @@
                   "scikit-learn>=0.21",
 				  "trackpy",
                   "numpy>=1.16.5",
-				  "PyQt5>=5.14.0"]
+				  "PyQt5>=5.14.0,<6.0"]
 
 setuptools.setup(
     name="particlespy",
     package_dir={'particlespy':'particlespy'},
-    version="0.6.2",
+    version="0.6.3",
     author="Thomas Slater",
     author_email="tjaslater@gmail.com",
     description="A package to perform particle segmentation and analysis",