diff --git a/VERSION b/VERSION
index 17de5ad..1e24aa8 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-0.5.0-incubating-SNAPSHOT
+0.5.0-incubating-rc1
diff --git a/core/src/main/java/hivemall/HivemallConstants.java b/core/src/main/java/hivemall/HivemallConstants.java
index 5e6e407..43e3ec7 100644
--- a/core/src/main/java/hivemall/HivemallConstants.java
+++ b/core/src/main/java/hivemall/HivemallConstants.java
@@ -20,7 +20,7 @@
 
 public final class HivemallConstants {
 
-    public static final String VERSION = "0.5.0-incubating-SNAPSHOT";
+    public static final String VERSION = "0.5.0-incubating-rc1";
 
     public static final String BIAS_CLAUSE = "0";
     public static final int BIAS_CLAUSE_HASHVAL = 0;
diff --git a/spark/spark-2.0/src/test/scala/org/apache/spark/sql/hive/HiveUdfSuite.scala b/spark/spark-2.0/src/test/scala/org/apache/spark/sql/hive/HiveUdfSuite.scala
index d3bf435..e6c5d1c 100644
--- a/spark/spark-2.0/src/test/scala/org/apache/spark/sql/hive/HiveUdfSuite.scala
+++ b/spark/spark-2.0/src/test/scala/org/apache/spark/sql/hive/HiveUdfSuite.scala
@@ -35,7 +35,7 @@
 
     checkAnswer(
       sql(s"SELECT DISTINCT hivemall_version()"),
-      Row("0.5.0-incubating-SNAPSHOT")
+      Row("0.5.0-incubating-rc1")
     )
 
     // sql("DROP TEMPORARY FUNCTION IF EXISTS hivemall_version")
diff --git a/spark/spark-2.0/src/test/scala/org/apache/spark/sql/hive/HivemallOpsSuite.scala b/spark/spark-2.0/src/test/scala/org/apache/spark/sql/hive/HivemallOpsSuite.scala
index 5e99fd8..06e32ff 100644
--- a/spark/spark-2.0/src/test/scala/org/apache/spark/sql/hive/HivemallOpsSuite.scala
+++ b/spark/spark-2.0/src/test/scala/org/apache/spark/sql/hive/HivemallOpsSuite.scala
@@ -293,7 +293,7 @@
   }
 
   test("misc - hivemall_version") {
-    checkAnswer(DummyInputData.select(hivemall_version()), Row("0.5.0-incubating-SNAPSHOT"))
+    checkAnswer(DummyInputData.select(hivemall_version()), Row("0.5.0-incubating-rc1"))
   }
 
   test("misc - rowid") {
diff --git a/spark/spark-2.1/src/test/scala/org/apache/spark/sql/hive/HiveUdfSuite.scala b/spark/spark-2.1/src/test/scala/org/apache/spark/sql/hive/HiveUdfSuite.scala
index eb4ec04..4215266 100644
--- a/spark/spark-2.1/src/test/scala/org/apache/spark/sql/hive/HiveUdfSuite.scala
+++ b/spark/spark-2.1/src/test/scala/org/apache/spark/sql/hive/HiveUdfSuite.scala
@@ -35,7 +35,7 @@
 
     checkAnswer(
       sql(s"SELECT DISTINCT hivemall_version()"),
-      Row("0.5.0-incubating-SNAPSHOT")
+      Row("0.5.0-incubating-rc1")
     )
 
     // sql("DROP TEMPORARY FUNCTION IF EXISTS hivemall_version")
diff --git a/spark/spark-2.1/src/test/scala/org/apache/spark/sql/hive/HivemallOpsSuite.scala b/spark/spark-2.1/src/test/scala/org/apache/spark/sql/hive/HivemallOpsSuite.scala
index 84ab0cd..00525d9 100644
--- a/spark/spark-2.1/src/test/scala/org/apache/spark/sql/hive/HivemallOpsSuite.scala
+++ b/spark/spark-2.1/src/test/scala/org/apache/spark/sql/hive/HivemallOpsSuite.scala
@@ -295,7 +295,7 @@
   }
 
   test("misc - hivemall_version") {
-    checkAnswer(DummyInputData.select(hivemall_version()), Row("0.5.0-incubating-SNAPSHOT"))
+    checkAnswer(DummyInputData.select(hivemall_version()), Row("0.5.0-incubating-rc1"))
   }
 
   test("misc - rowid") {
diff --git a/spark/spark-2.2/src/test/scala/org/apache/spark/sql/hive/HiveUdfSuite.scala b/spark/spark-2.2/src/test/scala/org/apache/spark/sql/hive/HiveUdfSuite.scala
index 1e1c574..0203310 100644
--- a/spark/spark-2.2/src/test/scala/org/apache/spark/sql/hive/HiveUdfSuite.scala
+++ b/spark/spark-2.2/src/test/scala/org/apache/spark/sql/hive/HiveUdfSuite.scala
@@ -36,7 +36,7 @@
 
     checkAnswer(
       sql(s"SELECT DISTINCT hivemall_version()"),
-      Row("0.5.0-incubating-SNAPSHOT")
+      Row("0.5.0-incubating-rc1")
     )
 
     // sql("DROP TEMPORARY FUNCTION IF EXISTS hivemall_version")
diff --git a/spark/spark-2.2/src/test/scala/org/apache/spark/sql/hive/HivemallOpsSuite.scala b/spark/spark-2.2/src/test/scala/org/apache/spark/sql/hive/HivemallOpsSuite.scala
index f73cb75..33048c6 100644
--- a/spark/spark-2.2/src/test/scala/org/apache/spark/sql/hive/HivemallOpsSuite.scala
+++ b/spark/spark-2.2/src/test/scala/org/apache/spark/sql/hive/HivemallOpsSuite.scala
@@ -562,7 +562,7 @@
   }
 
   test("misc - hivemall_version") {
-    checkAnswer(DummyInputData.select(hivemall_version()), Row("0.5.0-incubating-SNAPSHOT"))
+    checkAnswer(DummyInputData.select(hivemall_version()), Row("0.5.0-incubating-rc1"))
   }
 
   test("misc - rowid") {