diff --git a/pycoax/requirements.txt b/pycoax/requirements.txt
index c343611..926a4ab 100644
--- a/pycoax/requirements.txt
+++ b/pycoax/requirements.txt
@@ -1,2 +1,2 @@
-pyserial==3.4
-sliplib==0.5.0
+pyserial==3.5
+sliplib==0.6.2
diff --git a/pycoax/setup.py b/pycoax/setup.py
index 1cc3438..0d304bf 100644
--- a/pycoax/setup.py
+++ b/pycoax/setup.py
@@ -21,7 +21,7 @@ setup(
     author='Andrew Kay',
     author_email='projects@ajk.me',
     packages=['coax'],
-    install_requires=['pyserial==3.4', 'sliplib==0.5.0'],
+    install_requires=['pyserial==3.5', 'sliplib==0.6.2'],
     long_description=LONG_DESCRIPTION,
     long_description_content_type='text/markdown',
     classifiers=[