diff --git a/setup.cfg b/setup.cfg
index 15e37df..a625f92 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -1,6 +1,6 @@
 [metadata]
 name = arduino-simple-rpc
-version = 2.4.0
+version = 2.4.1
 description = Arduino simpleRPC API client library and CLI.
 long_description = file: README.rst
 author = Jeroen F.J. Laros
@@ -14,14 +14,13 @@ classifiers =
     Operating System :: OS Independent
     Programming Language :: Python
     Programming Language :: Python :: 3
-    Programming Language :: Python :: 3.5
     Topic :: Scientific/Engineering
 
 [options]
 packages = find:
 install_requires =
-    PyYAML==5.3.1
-    pyserial==3.4
+    PyYAML>=5.3.1
+    pyserial>=3.4
 
 [options.entry_points]
 console_scripts =