diff --git a/gsea-converter/pom.xml b/gsea-converter/pom.xml
index a72b532f8..cee3d4a22 100644
--- a/gsea-converter/pom.xml
+++ b/gsea-converter/pom.xml
@@ -2,7 +2,7 @@
   <parent>
     <groupId>org.biopax.paxtools</groupId>
     <artifactId>paxtools</artifactId>
-    <version>5.2.1-SNAPSHOT</version>
+    <version>5.2.1</version>
   </parent>
   <modelVersion>4.0.0</modelVersion>
 
@@ -13,7 +13,7 @@
   <url>https://biopax.github.io/Paxtools</url>
 
   <scm><url>https://github.com/BioPAX/Paxtools</url>
-      <tag>HEAD</tag>
+      <tag>v5.2.1</tag>
   </scm>
 
   <dependencies>
diff --git a/json-converter/pom.xml b/json-converter/pom.xml
index 2714d6f90..95dbd0980 100644
--- a/json-converter/pom.xml
+++ b/json-converter/pom.xml
@@ -3,7 +3,7 @@
 	<parent>
 		<artifactId>paxtools</artifactId>
 		<groupId>org.biopax.paxtools</groupId>
-		<version>5.2.1-SNAPSHOT</version>
+		<version>5.2.1</version>
 	</parent>
 	<artifactId>json-converter</artifactId>
 	<name>BioPAX to/from JSON Converter</name>
@@ -12,7 +12,7 @@
 	<url>https://biopax.github.io/Paxtools</url>
 
 	<scm><url>https://github.com/BioPAX/Paxtools</url>
-		<tag>HEAD</tag>
+		<tag>v5.2.1</tag>
 	</scm>
 
 	<build>
diff --git a/normalizer/pom.xml b/normalizer/pom.xml
index cfd8a3228..69c95b6a3 100644
--- a/normalizer/pom.xml
+++ b/normalizer/pom.xml
@@ -9,7 +9,7 @@
 	<parent>
 		<artifactId>paxtools</artifactId>
 		<groupId>org.biopax.paxtools</groupId>
-		<version>5.2.1-SNAPSHOT</version>
+		<version>5.2.1</version>
 	</parent>
 
 	<url>https://biopax.github.io/Paxtools</url>
diff --git a/pattern/pom.xml b/pattern/pom.xml
index c326bcda2..52085c375 100644
--- a/pattern/pom.xml
+++ b/pattern/pom.xml
@@ -5,7 +5,7 @@
 	<parent>
     	<groupId>org.biopax.paxtools</groupId>
 		<artifactId>paxtools</artifactId>
-		<version>5.2.1-SNAPSHOT</version>
+		<version>5.2.1</version>
 	</parent>
 
 	<artifactId>pattern</artifactId>
@@ -17,7 +17,7 @@
 	<url>https://biopax.github.io/Paxtools</url>
 
 	<scm><url>https://github.com/BioPAX/Paxtools</url>
-		<tag>HEAD</tag>
+		<tag>v5.2.1</tag>
 	</scm>
 
 	<dependencies>
diff --git a/paxtools-archetype/pom.xml b/paxtools-archetype/pom.xml
index f4cd6e69f..9d18ece66 100644
--- a/paxtools-archetype/pom.xml
+++ b/paxtools-archetype/pom.xml
@@ -5,7 +5,7 @@
 	<parent>
 		<artifactId>paxtools</artifactId>
 		<groupId>org.biopax.paxtools</groupId>
-		<version>5.2.1-SNAPSHOT</version>
+		<version>5.2.1</version>
 	</parent>
 
 	<artifactId>paxtools-archetype</artifactId>
@@ -18,7 +18,7 @@
 	<url>https://biopax.github.io/Paxtools</url>
 
 	<scm><url>https://github.com/BioPAX/Paxtools</url>
-		<tag>HEAD</tag>
+		<tag>v5.2.1</tag>
 	</scm>
 
 	<build>
diff --git a/paxtools-console/pom.xml b/paxtools-console/pom.xml
index 63f9f64e5..94a600728 100644
--- a/paxtools-console/pom.xml
+++ b/paxtools-console/pom.xml
@@ -3,7 +3,7 @@
 	<parent>
 		<artifactId>paxtools</artifactId>
 		<groupId>org.biopax.paxtools</groupId>
-		<version>5.2.1-SNAPSHOT</version>
+		<version>5.2.1</version>
 	</parent>
 	<artifactId>paxtools-console</artifactId>
 	<packaging>jar</packaging>
@@ -14,7 +14,7 @@
 
 	<scm>
 		<url>https://github.com/BioPAX/Paxtools</url>
-		<tag>HEAD</tag>
+		<tag>v5.2.1</tag>
 	</scm>
 
 	<build>
diff --git a/paxtools-core/pom.xml b/paxtools-core/pom.xml
index 4e1f343b5..0f717fc1f 100644
--- a/paxtools-core/pom.xml
+++ b/paxtools-core/pom.xml
@@ -4,7 +4,7 @@
 	<parent>
 		<groupId>org.biopax.paxtools</groupId>
 		<artifactId>paxtools</artifactId>
-		<version>5.2.1-SNAPSHOT</version>
+		<version>5.2.1</version>
 	</parent>
 
 	<artifactId>paxtools-core</artifactId>
@@ -18,7 +18,7 @@
 	<url>https://biopax.github.io/Paxtools</url>
 
 	<scm><url>https://github.com/BioPAX/Paxtools</url>
-		<tag>HEAD</tag>
+		<tag>v5.2.1</tag>
 	</scm>
 
 	<dependencies>
diff --git a/paxtools-query/pom.xml b/paxtools-query/pom.xml
index 15819445b..ff850bc5e 100644
--- a/paxtools-query/pom.xml
+++ b/paxtools-query/pom.xml
@@ -2,7 +2,7 @@
     <parent>
         <artifactId>paxtools</artifactId>
         <groupId>org.biopax.paxtools</groupId>
-        <version>5.2.1-SNAPSHOT</version>
+        <version>5.2.1</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>
 
@@ -17,7 +17,7 @@
     <url>https://biopax.github.io/Paxtools</url>
 
     <scm><url>https://github.com/BioPAX/Paxtools</url>
-        <tag>HEAD</tag>
+        <tag>v5.2.1</tag>
     </scm>
 
     <dependencies>
diff --git a/paxtools-search/pom.xml b/paxtools-search/pom.xml
index d6db8324a..d8d41f92b 100644
--- a/paxtools-search/pom.xml
+++ b/paxtools-search/pom.xml
@@ -1,12 +1,11 @@
-<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>
 		<artifactId>paxtools</artifactId>
 		<groupId>org.biopax.paxtools</groupId>
-		<version>5.2.1-SNAPSHOT</version>
+		<version>5.2.1</version>
 	</parent>
 
 	<artifactId>paxtools-search</artifactId>
@@ -16,7 +15,7 @@
 	<url>https://biopax.github.io/Paxtools</url>
 
 	<scm><url>https://github.com/BioPAX/Paxtools</url>
-		<tag>HEAD</tag>
+		<tag>v5.2.1</tag>
 	</scm>
 
 	<properties>
diff --git a/paxtools-trove/pom.xml b/paxtools-trove/pom.xml
index 5c96fe626..634456aa0 100644
--- a/paxtools-trove/pom.xml
+++ b/paxtools-trove/pom.xml
@@ -4,7 +4,7 @@
 	<parent>
 		<groupId>org.biopax.paxtools</groupId>
 		<artifactId>paxtools</artifactId>
-		<version>5.2.1-SNAPSHOT</version>
+		<version>5.2.1</version>
 	</parent>
 
 	<artifactId>paxtools-trove</artifactId>
@@ -17,7 +17,7 @@
 	<url>https://biopax.github.io/Paxtools</url>
 
 	<scm><url>https://github.com/BioPAX/Paxtools</url>
-		<tag>HEAD</tag>
+		<tag>v5.2.1</tag>
 	</scm>
 
 	<dependencies>
diff --git a/pom.xml b/pom.xml
index 03ff3bc76..b27f465eb 100644
--- a/pom.xml
+++ b/pom.xml
@@ -1,13 +1,12 @@
 <?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/maven-v4_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/maven-v4_0_0.xsd">
 
   <modelVersion>4.0.0</modelVersion>
   <packaging>pom</packaging>
 
   <groupId>org.biopax.paxtools</groupId>
   <artifactId>paxtools</artifactId>
-  <version>5.2.1-SNAPSHOT</version>
+  <version>5.2.1</version>
 
   <name>Paxtools</name>
 
@@ -187,7 +186,7 @@
     <connection>scm:git:git://github.com/BioPAX/Paxtools.git</connection>
     <developerConnection>scm:git:git@github.com:BioPAX/Paxtools.git</developerConnection>
     <url>https://github.com/BioPAX/Paxtools</url>
-    <tag>HEAD</tag>
+    <tag>v5.2.1</tag>
   </scm>
 
   <distributionManagement>
diff --git a/psimi-converter/pom.xml b/psimi-converter/pom.xml
index c6615cd56..80989582b 100644
--- a/psimi-converter/pom.xml
+++ b/psimi-converter/pom.xml
@@ -3,7 +3,7 @@
     <parent>
         <groupId>org.biopax.paxtools</groupId>
         <artifactId>paxtools</artifactId>
-        <version>5.2.1-SNAPSHOT</version>
+        <version>5.2.1</version>
     </parent>
 
     <modelVersion>4.0.0</modelVersion>
@@ -15,7 +15,7 @@
 
     <scm>
         <url>https://github.com/BioPAX/Paxtools</url>
-        <tag>HEAD</tag>
+        <tag>v5.2.1</tag>
     </scm>
 
     <dependencies>
diff --git a/sbgn-converter/pom.xml b/sbgn-converter/pom.xml
index d95f41dcc..bcd472bfd 100644
--- a/sbgn-converter/pom.xml
+++ b/sbgn-converter/pom.xml
@@ -2,7 +2,7 @@
     <parent>
         <artifactId>paxtools</artifactId>
         <groupId>org.biopax.paxtools</groupId>
-        <version>5.2.1-SNAPSHOT</version>
+        <version>5.2.1</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>
 
@@ -15,7 +15,7 @@
     <url>https://biopax.github.io/Paxtools</url>
 
     <scm><url>https://github.com/BioPAX/Paxtools</url>
-        <tag>HEAD</tag>
+        <tag>v5.2.1</tag>
     </scm>
 
     <dependencies>