diff --git a/eo-archetype/pom.xml b/eo-archetype/pom.xml
index 7b625b037e..b531d672bd 100644
--- a/eo-archetype/pom.xml
+++ b/eo-archetype/pom.xml
@@ -27,7 +27,7 @@ SOFTWARE.
   <parent>
     <artifactId>eo-parent</artifactId>
     <groupId>org.eolang</groupId>
-    <version>1.0-SNAPSHOT</version>
+    <version>0.1.1</version>
   </parent>
   <artifactId>eo-archetype</artifactId>
   <packaging>jar</packaging>
diff --git a/eo-compiler/pom.xml b/eo-compiler/pom.xml
index 84d6a070fa..aebe5d976c 100644
--- a/eo-compiler/pom.xml
+++ b/eo-compiler/pom.xml
@@ -27,7 +27,7 @@ SOFTWARE.
   <parent>
     <groupId>org.eolang</groupId>
     <artifactId>eo-parent</artifactId>
-    <version>1.0-SNAPSHOT</version>
+    <version>0.1.1</version>
   </parent>
   <artifactId>eo-compiler</artifactId>
   <packaging>jar</packaging>
diff --git a/eo-maven-plugin/pom.xml b/eo-maven-plugin/pom.xml
index f2869b38c2..8a15909f1d 100644
--- a/eo-maven-plugin/pom.xml
+++ b/eo-maven-plugin/pom.xml
@@ -27,7 +27,7 @@ SOFTWARE.
   <parent>
     <groupId>org.eolang</groupId>
     <artifactId>eo-parent</artifactId>
-    <version>1.0-SNAPSHOT</version>
+    <version>0.1.1</version>
   </parent>
   <artifactId>eo-maven-plugin</artifactId>
   <packaging>maven-plugin</packaging>
@@ -40,12 +40,12 @@ SOFTWARE.
     <dependency>
       <groupId>org.eolang</groupId>
       <artifactId>eo-compiler</artifactId>
-      <version>1.0-SNAPSHOT</version>
+      <version>0.1.1</version>
     </dependency>
     <dependency>
       <groupId>org.eolang</groupId>
       <artifactId>eo-runtime</artifactId>
-      <version>1.0-SNAPSHOT</version>
+      <version>0.1.1</version>
       <scope>provided</scope>
     </dependency>
     <dependency>
diff --git a/eo-runtime/pom.xml b/eo-runtime/pom.xml
index 6e150a3cd9..b934033ce6 100644
--- a/eo-runtime/pom.xml
+++ b/eo-runtime/pom.xml
@@ -27,7 +27,7 @@ SOFTWARE.
   <parent>
     <groupId>org.eolang</groupId>
     <artifactId>eo-parent</artifactId>
-    <version>1.0-SNAPSHOT</version>
+    <version>0.1.1</version>
   </parent>
   <artifactId>eo-runtime</artifactId>
   <packaging>jar</packaging>
diff --git a/pom.xml b/pom.xml
index 766ee02e76..c620658e6f 100644
--- a/pom.xml
+++ b/pom.xml
@@ -31,7 +31,7 @@ SOFTWARE.
   </parent>
   <groupId>org.eolang</groupId>
   <artifactId>eo-parent</artifactId>
-  <version>1.0-SNAPSHOT</version>
+  <version>0.1.1</version>
   <packaging>pom</packaging>
   <name>eo-parent</name>
   <modules>