diff --git a/CHANGES.md b/CHANGES.md
index afeba73c..edc0c98c 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -1,5 +1,11 @@
 # Change log for kotlinx.atomicfu 
 
+## Version 0.4
+
+* Publish sources.
+* Provide top-level `pauseLockFreeOp` for debugging.
+* Stability improvements.
+
 ## Version 0.3
 
 * Improved handling of compiler local variables for atomic fields.
diff --git a/README.md b/README.md
index 6f3e67ff..2c01860b 100644
--- a/README.md
+++ b/README.md
@@ -82,7 +82,7 @@ Declare AtomicFU version:
 
 ```xml
 <properties>
-     <atomicfu.version>0.3</atomicfu.version>
+     <atomicfu.version>0.4</atomicfu.version>
 </properties> 
 ```
 
diff --git a/atomicfu-maven-plugin/pom.xml b/atomicfu-maven-plugin/pom.xml
index 4dd721c3..7e09e377 100644
--- a/atomicfu-maven-plugin/pom.xml
+++ b/atomicfu-maven-plugin/pom.xml
@@ -21,7 +21,7 @@
     <parent>
         <groupId>org.jetbrains.kotlinx</groupId>
         <artifactId>atomicfu-parent</artifactId>
-        <version>0.3-SNAPSHOT</version>
+        <version>0.4-SNAPSHOT</version>
     </parent>
 
     <artifactId>atomicfu-maven-plugin</artifactId>
diff --git a/atomicfu-test/pom.xml b/atomicfu-test/pom.xml
index fbdd55e8..35a50642 100644
--- a/atomicfu-test/pom.xml
+++ b/atomicfu-test/pom.xml
@@ -21,7 +21,7 @@
     <parent>
         <groupId>org.jetbrains.kotlinx</groupId>
         <artifactId>atomicfu-parent</artifactId>
-        <version>0.3-SNAPSHOT</version>
+        <version>0.4-SNAPSHOT</version>
     </parent>
 
     <artifactId>atomicfu-test</artifactId>
diff --git a/atomicfu-transformer/pom.xml b/atomicfu-transformer/pom.xml
index 6d3bceee..8f088a9a 100644
--- a/atomicfu-transformer/pom.xml
+++ b/atomicfu-transformer/pom.xml
@@ -21,7 +21,7 @@
     <parent>
         <groupId>org.jetbrains.kotlinx</groupId>
         <artifactId>atomicfu-parent</artifactId>
-        <version>0.3-SNAPSHOT</version>
+        <version>0.4-SNAPSHOT</version>
     </parent>
 
     <artifactId>atomicfu-transformer</artifactId>
diff --git a/atomicfu/pom.xml b/atomicfu/pom.xml
index b029f0b0..725667ac 100644
--- a/atomicfu/pom.xml
+++ b/atomicfu/pom.xml
@@ -21,7 +21,7 @@
     <parent>
         <groupId>org.jetbrains.kotlinx</groupId>
         <artifactId>atomicfu-parent</artifactId>
-        <version>0.3-SNAPSHOT</version>
+        <version>0.4-SNAPSHOT</version>
     </parent>
 
     <artifactId>atomicfu</artifactId>
diff --git a/pom.xml b/pom.xml
index ed0d453a..e6d296b1 100644
--- a/pom.xml
+++ b/pom.xml
@@ -20,7 +20,7 @@
 
     <groupId>org.jetbrains.kotlinx</groupId>
     <artifactId>atomicfu-parent</artifactId>
-    <version>0.3-SNAPSHOT</version>
+    <version>0.4-SNAPSHOT</version>
     <packaging>pom</packaging>
 
     <name>AtomicFU</name>