diff --git a/dev_requirements.txt b/dev_requirements.txt
index bbedfb68..42999d22 100644
--- a/dev_requirements.txt
+++ b/dev_requirements.txt
@@ -1,6 +1,6 @@
 coveragepy-lcov <0.2.0; python_version >= '3.8'
 networkx <2.7
-psyneulink >=0.9.1.0, <0.9.2.0
+psyneulink >=0.9.1.0, <0.10.1.0
 pytest <6.3
 pytest-benchmark <3.4.2
 pytest-cov <3.0.1