diff --git a/CHANGELOG.md b/CHANGELOG.md
index c199cbc..3f3a91f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,6 @@
 # Changelog
 
-## Unreleased
+## 3.1.1 (2026-05-31)
 
 ### Changed
 
diff --git a/src/erlang_python.app.src b/src/erlang_python.app.src
index 7cf6d7b..9bdcfd9 100644
--- a/src/erlang_python.app.src
+++ b/src/erlang_python.app.src
@@ -1,6 +1,6 @@
 {application, erlang_python, [
     {description, "Execute Python applications from Erlang using dirty NIFs"},
-    {vsn, "3.1.0"},
+    {vsn, "3.1.1"},
     {registered, []},
     {mod, {erlang_python_app, []}},
     {applications, [