diff --git a/gradle.properties b/gradle.properties
index d943c0e1f96..627eceb636b 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -1,5 +1,5 @@
 group=com.linecorp.armeria
-version=1.31.1-SNAPSHOT
+version=1.31.1
 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