diff --git a/CHANGELOG.md b/CHANGELOG.md
index cf7cd260..fa9390cc 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,7 @@
 # Changelog
 
+## [Unreleased]
+
 ## [0.13.20] - 2025-09-23
 
 Requires libsignal-client version 0.81.0.
diff --git a/build.gradle.kts b/build.gradle.kts
index 6f85ce25..ad41dd8a 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -8,7 +8,7 @@ plugins {
 
 allprojects {
     group = "org.asamk"
-    version = "0.13.20"
+    version = "0.13.21-SNAPSHOT"
 }
 
 java {