diff --git a/pymtl3/version.py b/pymtl3/version.py
index 1ac6974f9..6d28578ce 100644
--- a/pymtl3/version.py
+++ b/pymtl3/version.py
@@ -1 +1 @@
-__version__ = "3.1.15"
+__version__ = "3.1.16"
diff --git a/requirements/dev.txt b/requirements/dev.txt
index 4b3dd8b40..e1cbdef1a 100644
--- a/requirements/dev.txt
+++ b/requirements/dev.txt
@@ -7,4 +7,3 @@ flake8
 isort
 pyupgrade
 graphviz
-py
diff --git a/requirements/release.txt b/requirements/release.txt
index 3abff32de..7b35e17f6 100644
--- a/requirements/release.txt
+++ b/requirements/release.txt
@@ -1,4 +1,5 @@
 # Minimal dependencies required for using pip-installed PyMTL
+py
 pytest
 hypothesis
 cffi