diff --git a/README.md b/README.md
index a2326bfc..43b2214b 100644
--- a/README.md
+++ b/README.md
@@ -191,42 +191,42 @@ Install
 -------
 To use `slick-pg` in [sbt](http://www.scala-sbt.org/ "slick-sbt") project, add the following to your project file:
 ```scala
-libraryDependencies += "com.github.tminglei" %% "slick-pg" % "0.15.0-M4"
+libraryDependencies += "com.github.tminglei" %% "slick-pg" % "0.15.0-RC"
 ```
 
 > If you need `joda-time` support, pls append dependency:
 ```scala
-libraryDependencies += "com.github.tminglei" %% "slick-pg_joda-time" % "0.15.0-M4"
+libraryDependencies += "com.github.tminglei" %% "slick-pg_joda-time" % "0.15.0-RC"
 ```
 
 > If you need `jts` geom support, pls append dependency:
 ```scala
-libraryDependencies += "com.github.tminglei" %% "slick-pg_jts" % "0.15.0-M4"
+libraryDependencies += "com.github.tminglei" %% "slick-pg_jts" % "0.15.0-RC"
 ```
 
 > If you need `json4s` support, pls append dependency:
 ```scala
-libraryDependencies += "com.github.tminglei" %% "slick-pg_json4s" % "0.15.0-M4"
+libraryDependencies += "com.github.tminglei" %% "slick-pg_json4s" % "0.15.0-RC"
 ```
 
 > If you need `play-json` support, pls append dependency:
 ```scala
-libraryDependencies += "com.github.tminglei" %% "slick-pg_play-json" % "0.15.0-M4"
+libraryDependencies += "com.github.tminglei" %% "slick-pg_play-json" % "0.15.0-RC"
 ```
 
 > If you need `spray-json` support, pls append dependency:
 ```scala
-libraryDependencies += "com.github.tminglei" %% "slick-pg_spray-json" % "0.15.0-M4"
+libraryDependencies += "com.github.tminglei" %% "slick-pg_spray-json" % "0.15.0-RC"
 ```
 
 > If you need `argonaut json` support, pls append dependency:
 ```scala
-libraryDependencies += "com.github.tminglei" %% "slick-pg_argonaut" % "0.15.0-M4"
+libraryDependencies += "com.github.tminglei" %% "slick-pg_argonaut" % "0.15.0-RC"
 ```
 
 > If you need `circe json` support, pls append dependency:
 ```scala
-libraryDependencies += "com.github.tminglei" %% "slick-pg_circe-json" % "0.15.0-M4"
+libraryDependencies += "com.github.tminglei" %% "slick-pg_circe-json" % "0.15.0-RC"
 ```
 
 
@@ -235,7 +235,7 @@ Or, in [maven](http://maven.apache.org/ "maven") project, you can add `slick-pg`
 <dependency>
     <groupId>com.github.tminglei</groupId>
     <artifactId>slick-pg_2.12</artifactId>
-    <version>0.15.0-M4</version>
+    <version>0.15.0-RC</version>
 </dependency>
 <!-- other addons if necessary -->
 ...
diff --git a/build.sbt b/build.sbt
index 69834e9f..7939f4bb 100644
--- a/build.sbt
+++ b/build.sbt
@@ -2,7 +2,7 @@ lazy val commonSettings = Seq(
   organizationName := "slick-pg",
   organization := "com.github.tminglei",
   name := "slick-pg",
-  version := "0.15.0-M5",
+  version := "0.15.0-RC",
 
   scalaVersion := "2.12.1",
   crossScalaVersions := Seq("2.12.1", "2.11.8"),