diff --git a/jjava-launcher/pom.xml b/jjava-launcher/pom.xml
index 481a5f5..3450ddf 100644
--- a/jjava-launcher/pom.xml
+++ b/jjava-launcher/pom.xml
@@ -1,13 +1,11 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<project xmlns="http://maven.apache.org/POM/4.0.0"
-         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
     <modelVersion>4.0.0</modelVersion>
 
     <parent>
         <groupId>org.dflib.jjava</groupId>
         <artifactId>jjava-parent</artifactId>
-        <version>1.0-SNAPSHOT</version>
+        <version>1.0a4</version>
     </parent>
 
     <artifactId>jjava-launcher</artifactId>
diff --git a/jjava/pom.xml b/jjava/pom.xml
index b6d448a..f3cff52 100644
--- a/jjava/pom.xml
+++ b/jjava/pom.xml
@@ -5,7 +5,7 @@
     <parent>
         <groupId>org.dflib.jjava</groupId>
         <artifactId>jjava-parent</artifactId>
-        <version>1.0-SNAPSHOT</version>
+        <version>1.0a4</version>
     </parent>
 
     <artifactId>jjava</artifactId>
diff --git a/jupyter-jvm-basekernel/pom.xml b/jupyter-jvm-basekernel/pom.xml
index 0de849d..835b431 100644
--- a/jupyter-jvm-basekernel/pom.xml
+++ b/jupyter-jvm-basekernel/pom.xml
@@ -5,7 +5,7 @@
     <parent>
         <groupId>org.dflib.jjava</groupId>
         <artifactId>jjava-parent</artifactId>
-        <version>1.0-SNAPSHOT</version>
+        <version>1.0a4</version>
     </parent>
 
     <artifactId>jupyter-jvm-basekernel</artifactId>
diff --git a/pom.xml b/pom.xml
index 35d40b6..8e16304 100644
--- a/pom.xml
+++ b/pom.xml
@@ -3,7 +3,7 @@
 
     <groupId>org.dflib.jjava</groupId>
     <artifactId>jjava-parent</artifactId>
-    <version>1.0-SNAPSHOT</version>
+    <version>1.0a4</version>
 
     <packaging>pom</packaging>
 
@@ -61,7 +61,7 @@
         <connection>scm:git:https://github.com/m-dzianishchyts/jjava</connection>
         <developerConnection>scm:git:ssh://git@github.com/m-dzianishchyts/jjava</developerConnection>
         <url>https://github.com/m-dzianishchyts/jjava</url>
-        <tag>HEAD</tag>
+        <tag>1.0a4</tag>
     </scm>
 
     <distributionManagement>