diff --git a/gradle.properties b/gradle.properties
index cafee73dc18..330098248b0 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -1,5 +1,5 @@
 group=com.linecorp.armeria
-version=1.21.1-SNAPSHOT
+version=1.22.1-SNAPSHOT
 projectName=Armeria
 projectUrl=https://armeria.dev/
 projectDescription=Asynchronous HTTP/2 RPC/REST client/server library built on top of Java 8, Netty, Thrift and gRPC