diff --git a/CHANGELOG b/CHANGELOG
index 04cf45396..c4fafec3f 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,3 +1,7 @@
+# 2.13.1 (2020-XX-XX)
+
+ * n/a
+
 # 2.13.0 (2020-07-05)
 
  * Fix options not taken into account when using "Michelf\MarkdownExtra"
diff --git a/src/Environment.php b/src/Environment.php
index fab6c7898..5d78182cf 100644
--- a/src/Environment.php
+++ b/src/Environment.php
@@ -38,12 +38,12 @@ use Twig\TokenParser\TokenParserInterface;
  */
 class Environment
 {
-    const VERSION = '2.13.0';
-    const VERSION_ID = 21300;
+    const VERSION = '2.13.1';
+    const VERSION_ID = 21301;
     const MAJOR_VERSION = 2;
     const MINOR_VERSION = 13;
-    const RELEASE_VERSION = 0;
-    const EXTRA_VERSION = '';
+    const RELEASE_VERSION = 1;
+    const EXTRA_VERSION = 'DEV';
 
     private $charset;
     private $loader;