diff --git a/pom.xml b/pom.xml
index 7b808ef0..0b702744 100644
--- a/pom.xml
+++ b/pom.xml
@@ -21,7 +21,7 @@
 
     <groupId>io.gdcc</groupId>
     <artifactId>xoai</artifactId>
-    <version>5.2.1-SNAPSHOT</version>
+    <version>5.2.1</version>
 
     <organization>
         <name>Global Dataverse Community Consortium</name>
@@ -107,7 +107,7 @@
         <connection>scm:git:git@github.com:gdcc/xoai.git</connection>
         <developerConnection>scm:git:git@github.com:gdcc/xoai.git</developerConnection>
         <url>git@github.com:gdcc/xoai.git</url>
-        <tag>HEAD</tag>
+        <tag>xoai-5.2.1</tag>
     </scm>
 
     <ciManagement>
diff --git a/report/pom.xml b/report/pom.xml
index 4e07fbca..5c1f693b 100644
--- a/report/pom.xml
+++ b/report/pom.xml
@@ -11,7 +11,7 @@
     <parent>
         <artifactId>xoai</artifactId>
         <groupId>io.gdcc</groupId>
-        <version>5.2.1-SNAPSHOT</version>
+        <version>5.2.1</version>
     </parent>
 
     <modelVersion>4.0.0</modelVersion>
diff --git a/xoai-common/pom.xml b/xoai-common/pom.xml
index 07473afb..9c2360a4 100644
--- a/xoai-common/pom.xml
+++ b/xoai-common/pom.xml
@@ -11,7 +11,7 @@
     <parent>
         <artifactId>xoai</artifactId>
         <groupId>io.gdcc</groupId>
-        <version>5.2.1-SNAPSHOT</version>
+        <version>5.2.1</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>
 
diff --git a/xoai-data-provider-tck/pom.xml b/xoai-data-provider-tck/pom.xml
index 902db189..d252c031 100644
--- a/xoai-data-provider-tck/pom.xml
+++ b/xoai-data-provider-tck/pom.xml
@@ -11,7 +11,7 @@
     <parent>
         <artifactId>xoai</artifactId>
         <groupId>io.gdcc</groupId>
-        <version>5.2.1-SNAPSHOT</version>
+        <version>5.2.1</version>
     </parent>
 
     <modelVersion>4.0.0</modelVersion>
diff --git a/xoai-data-provider/pom.xml b/xoai-data-provider/pom.xml
index 3aacdfb1..2a73eec8 100644
--- a/xoai-data-provider/pom.xml
+++ b/xoai-data-provider/pom.xml
@@ -11,7 +11,7 @@
     <parent>
         <artifactId>xoai</artifactId>
         <groupId>io.gdcc</groupId>
-        <version>5.2.1-SNAPSHOT</version>
+        <version>5.2.1</version>
     </parent>
 
     <modelVersion>4.0.0</modelVersion>
diff --git a/xoai-service-provider/pom.xml b/xoai-service-provider/pom.xml
index c2e4616a..4b10ca96 100644
--- a/xoai-service-provider/pom.xml
+++ b/xoai-service-provider/pom.xml
@@ -11,7 +11,7 @@
     <parent>
         <groupId>io.gdcc</groupId>
         <artifactId>xoai</artifactId>
-        <version>5.2.1-SNAPSHOT</version>
+        <version>5.2.1</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>
 
diff --git a/xoai-xmlio/pom.xml b/xoai-xmlio/pom.xml
index 26089a79..a7ac6c7f 100644
--- a/xoai-xmlio/pom.xml
+++ b/xoai-xmlio/pom.xml
@@ -4,7 +4,7 @@
     <parent>
         <groupId>io.gdcc</groupId>
         <artifactId>xoai</artifactId>
-        <version>5.2.1-SNAPSHOT</version>
+        <version>5.2.1</version>
     </parent>
 
     <artifactId>xoai-xmlio</artifactId>