diff --git a/lamcalcj-ast/pom.xml b/lamcalcj-ast/pom.xml
index 5c9d152..1c0c401 100644
--- a/lamcalcj-ast/pom.xml
+++ b/lamcalcj-ast/pom.xml
@@ -5,7 +5,7 @@
 	<parent>
 		<groupId>org.lamcalcj</groupId>
 		<artifactId>lamcalcj-parent</artifactId>
-		<version>1.3.1-SNAPSHOT</version>
+		<version>1.3.1</version>
 	</parent>
 	<artifactId>lamcalcj-ast</artifactId>
 
diff --git a/lamcalcj-compiler/pom.xml b/lamcalcj-compiler/pom.xml
index b54c414..87622c4 100644
--- a/lamcalcj-compiler/pom.xml
+++ b/lamcalcj-compiler/pom.xml
@@ -5,7 +5,7 @@
 	<parent>
 		<groupId>org.lamcalcj</groupId>
 		<artifactId>lamcalcj-parent</artifactId>
-		<version>1.3.1-SNAPSHOT</version>
+		<version>1.3.1</version>
 	</parent>
 	<artifactId>lamcalcj-compiler</artifactId>
 
@@ -22,12 +22,12 @@
 		<dependency>
 			<groupId>org.lamcalcj</groupId>
 			<artifactId>lamcalcj-ast</artifactId>
-			<version>1.3.1-SNAPSHOT</version>
+			<version>1.3.1</version>
 		</dependency>
 		<dependency>
 			<groupId>org.lamcalcj</groupId>
 			<artifactId>lamcalcj-parser</artifactId>
-			<version>1.3.1-SNAPSHOT</version>
+			<version>1.3.1</version>
 		</dependency>
 		<dependency>
 			<groupId>org.scalatest</groupId>
diff --git a/lamcalcj-parser/pom.xml b/lamcalcj-parser/pom.xml
index da0b056..bc086ee 100644
--- a/lamcalcj-parser/pom.xml
+++ b/lamcalcj-parser/pom.xml
@@ -5,7 +5,7 @@
 	<parent>
 		<groupId>org.lamcalcj</groupId>
 		<artifactId>lamcalcj-parent</artifactId>
-		<version>1.3.1-SNAPSHOT</version>
+		<version>1.3.1</version>
 	</parent>
 	<artifactId>lamcalcj-parser</artifactId>
 
@@ -22,7 +22,7 @@
 		<dependency>
 			<groupId>org.lamcalcj</groupId>
 			<artifactId>lamcalcj-utils</artifactId>
-			<version>1.3.1-SNAPSHOT</version>
+			<version>1.3.1</version>
 		</dependency>
 		<dependency>
 			<groupId>org.scalatest</groupId>
diff --git a/lamcalcj-pretty-print/pom.xml b/lamcalcj-pretty-print/pom.xml
index 22a862f..6032d73 100644
--- a/lamcalcj-pretty-print/pom.xml
+++ b/lamcalcj-pretty-print/pom.xml
@@ -5,7 +5,7 @@
 	<parent>
 		<groupId>org.lamcalcj</groupId>
 		<artifactId>lamcalcj-parent</artifactId>
-		<version>1.3.1-SNAPSHOT</version>
+		<version>1.3.1</version>
 	</parent>
 	<artifactId>lamcalcj-pretty-print</artifactId>
 
@@ -22,17 +22,17 @@
 		<dependency>
 			<groupId>org.lamcalcj</groupId>
 			<artifactId>lamcalcj-ast</artifactId>
-			<version>1.3.1-SNAPSHOT</version>
+			<version>1.3.1</version>
 		</dependency>
 		<dependency>
 			<groupId>org.lamcalcj</groupId>
 			<artifactId>lamcalcj-utils</artifactId>
-			<version>1.3.1-SNAPSHOT</version>
+			<version>1.3.1</version>
 		</dependency>
 		<dependency>
 			<groupId>org.lamcalcj</groupId>
 			<artifactId>lamcalcj-compiler</artifactId>
-			<version>1.3.1-SNAPSHOT</version>
+			<version>1.3.1</version>
 			<scope>test</scope>
 		</dependency>
 		<dependency>
diff --git a/lamcalcj-reducer/pom.xml b/lamcalcj-reducer/pom.xml
index cd27b6e..7201005 100644
--- a/lamcalcj-reducer/pom.xml
+++ b/lamcalcj-reducer/pom.xml
@@ -5,7 +5,7 @@
 	<parent>
 		<groupId>org.lamcalcj</groupId>
 		<artifactId>lamcalcj-parent</artifactId>
-		<version>1.3.1-SNAPSHOT</version>
+		<version>1.3.1</version>
 	</parent>
 	<artifactId>lamcalcj-reducer</artifactId>
 
@@ -22,23 +22,23 @@
 		<dependency>
 			<groupId>org.lamcalcj</groupId>
 			<artifactId>lamcalcj-ast</artifactId>
-			<version>1.3.1-SNAPSHOT</version>
+			<version>1.3.1</version>
 		</dependency>
 		<dependency>
 			<groupId>org.lamcalcj</groupId>
 			<artifactId>lamcalcj-utils</artifactId>
-			<version>1.3.1-SNAPSHOT</version>
+			<version>1.3.1</version>
 		</dependency>
 		<dependency>
 			<groupId>org.lamcalcj</groupId>
 			<artifactId>lamcalcj-compiler</artifactId>
-			<version>1.3.1-SNAPSHOT</version>
+			<version>1.3.1</version>
 			<scope>test</scope>
 		</dependency>
 		<dependency>
 			<groupId>org.lamcalcj</groupId>
 			<artifactId>lamcalcj-pretty-print</artifactId>
-			<version>1.3.1-SNAPSHOT</version>
+			<version>1.3.1</version>
 			<scope>test</scope>
 		</dependency>
 		<dependency>
diff --git a/lamcalcj-utils/pom.xml b/lamcalcj-utils/pom.xml
index 24297f9..d1b0fdb 100644
--- a/lamcalcj-utils/pom.xml
+++ b/lamcalcj-utils/pom.xml
@@ -5,7 +5,7 @@
 	<parent>
 		<groupId>org.lamcalcj</groupId>
 		<artifactId>lamcalcj-parent</artifactId>
-		<version>1.3.1-SNAPSHOT</version>
+		<version>1.3.1</version>
 	</parent>
 	<artifactId>lamcalcj-utils</artifactId>
 
@@ -22,7 +22,7 @@
 		<dependency>
 			<groupId>org.lamcalcj</groupId>
 			<artifactId>lamcalcj-ast</artifactId>
-			<version>1.3.1-SNAPSHOT</version>
+			<version>1.3.1</version>
 		</dependency>
 		<dependency>
 			<groupId>org.scalatest</groupId>
diff --git a/pom.xml b/pom.xml
index 5621597..a6a7827 100644
--- a/pom.xml
+++ b/pom.xml
@@ -4,7 +4,7 @@
 	<modelVersion>4.0.0</modelVersion>
 	<groupId>org.lamcalcj</groupId>
 	<artifactId>lamcalcj-parent</artifactId>
-	<version>1.3.1-SNAPSHOT</version>
+	<version>1.3.1</version>
 	<packaging>pom</packaging>
 
 	<distributionManagement>