diff --git a/build.sbt b/build.sbt
index 5ca80c24..674f6ed0 100644
--- a/build.sbt
+++ b/build.sbt
@@ -153,6 +153,7 @@ lazy val framelessTypedDatasetREPL = Seq(
 )
 
 lazy val publishSettings = Seq(
+  useGpg := true,
   publishMavenStyle := true,
   publishTo := {
     val nexus = "https://oss.sonatype.org/"
diff --git a/version.sbt b/version.sbt
index acfbdb67..9f0e5a53 100644
--- a/version.sbt
+++ b/version.sbt
@@ -1 +1 @@
-version in ThisBuild := "0.4.0-SNAPSHOT"
+version in ThisBuild := "0.4.0"