diff --git a/metrics/api/pom.xml b/metrics/api/pom.xml
index 6178b5e2..cbc11853 100644
--- a/metrics/api/pom.xml
+++ b/metrics/api/pom.xml
@@ -22,7 +22,7 @@
     <parent>
         <groupId>org.commonjava.util</groupId>
         <artifactId>o11yphant-metrics</artifactId>
-        <version>1.9.1-SNAPSHOT</version>
+        <version>1.9.1</version>
     </parent>
 
     <artifactId>o11yphant-metrics-api</artifactId>
diff --git a/metrics/common/pom.xml b/metrics/common/pom.xml
index c4bdb04f..73e651af 100644
--- a/metrics/common/pom.xml
+++ b/metrics/common/pom.xml
@@ -22,7 +22,7 @@
     <parent>
         <groupId>org.commonjava.util</groupId>
         <artifactId>o11yphant-metrics</artifactId>
-        <version>1.9.1-SNAPSHOT</version>
+        <version>1.9.1</version>
     </parent>
 
     <artifactId>o11yphant-metrics-common</artifactId>
diff --git a/metrics/core/pom.xml b/metrics/core/pom.xml
index b8dc96ca..50f0552e 100644
--- a/metrics/core/pom.xml
+++ b/metrics/core/pom.xml
@@ -20,7 +20,7 @@
     <parent>
         <artifactId>o11yphant-metrics</artifactId>
         <groupId>org.commonjava.util</groupId>
-        <version>1.9.1-SNAPSHOT</version>
+        <version>1.9.1</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>
 
diff --git a/metrics/pom.xml b/metrics/pom.xml
index 734419db..f98034cf 100644
--- a/metrics/pom.xml
+++ b/metrics/pom.xml
@@ -20,7 +20,7 @@
   <parent>
     <artifactId>o11yphant</artifactId>
     <groupId>org.commonjava.util</groupId>
-    <version>1.9.1-SNAPSHOT</version>
+    <version>1.9.1</version>
   </parent>
   <modelVersion>4.0.0</modelVersion>
 
diff --git a/pom.xml b/pom.xml
index 27b2453c..e08895e2 100644
--- a/pom.xml
+++ b/pom.xml
@@ -26,7 +26,7 @@
 
     <groupId>org.commonjava.util</groupId>
     <artifactId>o11yphant</artifactId>
-    <version>1.9.1-SNAPSHOT</version>
+    <version>1.9.1</version>
 
     <packaging>pom</packaging>
     <modules>
@@ -42,7 +42,7 @@
         <connection>scm:git:https://github.com/commonjava/o11yphant</connection>
         <developerConnection>scm:git:https://github.com/commonjava/o11yphant</developerConnection>
         <url>https://github.com/Commonjava/o11yphant</url>
-        <tag>HEAD</tag>
+        <tag>o11yphant-1.9.1</tag>
     </scm>
 
     <properties>
@@ -84,17 +84,17 @@
             <dependency>
                 <groupId>org.commonjava.util</groupId>
                 <artifactId>o11yphant-trace-api</artifactId>
-                <version>1.9.1-SNAPSHOT</version>
+                <version>1.9.1</version>
             </dependency>
             <dependency>
                 <groupId>org.commonjava.util</groupId>
                 <artifactId>o11yphant-trace-core</artifactId>
-                <version>1.9.1-SNAPSHOT</version>
+                <version>1.9.1</version>
             </dependency>
             <dependency>
                 <groupId>org.commonjava.util</groupId>
                 <artifactId>o11yphant-trace-otel</artifactId>
-                <version>1.9.1-SNAPSHOT</version>
+                <version>1.9.1</version>
             </dependency>
             <!--
             <dependency>
@@ -106,38 +106,38 @@
             <dependency>
                 <groupId>org.commonjava.util</groupId>
                 <artifactId>o11yphant-trace-helper-servlet</artifactId>
-                <version>1.9.1-SNAPSHOT</version>
+                <version>1.9.1</version>
             </dependency>
             <dependency>
                 <groupId>org.commonjava.util</groupId>
                 <artifactId>o11yphant-trace-helper-httpclient</artifactId>
-                <version>1.9.1-SNAPSHOT</version>
+                <version>1.9.1</version>
             </dependency>
             <dependency>
                 <groupId>org.commonjava.util</groupId>
                 <artifactId>o11yphant-trace-helper-jhttpc</artifactId>
-                <version>1.9.1-SNAPSHOT</version>
+                <version>1.9.1</version>
             </dependency>
 
             <dependency>
                 <groupId>org.commonjava.util</groupId>
                 <artifactId>o11yphant-metrics</artifactId>
-                <version>1.9.1-SNAPSHOT</version>
+                <version>1.9.1</version>
             </dependency>
             <dependency>
                 <groupId>org.commonjava.util</groupId>
                 <artifactId>o11yphant-metrics-api</artifactId>
-                <version>1.9.1-SNAPSHOT</version>
+                <version>1.9.1</version>
             </dependency>
             <dependency>
                 <groupId>org.commonjava.util</groupId>
                 <artifactId>o11yphant-metrics-common</artifactId>
-                <version>1.9.1-SNAPSHOT</version>
+                <version>1.9.1</version>
             </dependency>
             <dependency>
                 <groupId>org.commonjava.util</groupId>
                 <artifactId>o11yphant-metrics-core</artifactId>
-                <version>1.9.1-SNAPSHOT</version>
+                <version>1.9.1</version>
             </dependency>
 
             <dependency>
diff --git a/trace/api/pom.xml b/trace/api/pom.xml
index 199e0614..809788ac 100644
--- a/trace/api/pom.xml
+++ b/trace/api/pom.xml
@@ -22,7 +22,7 @@
     <parent>
         <groupId>org.commonjava.util</groupId>
         <artifactId>o11yphant-trace</artifactId>
-        <version>1.9.1-SNAPSHOT</version>
+        <version>1.9.1</version>
     </parent>
 
     <artifactId>o11yphant-trace-api</artifactId>
diff --git a/trace/core/pom.xml b/trace/core/pom.xml
index 8e2433ce..0f8abfa9 100644
--- a/trace/core/pom.xml
+++ b/trace/core/pom.xml
@@ -22,7 +22,7 @@
     <parent>
         <groupId>org.commonjava.util</groupId>
         <artifactId>o11yphant-trace</artifactId>
-        <version>1.9.1-SNAPSHOT</version>
+        <version>1.9.1</version>
     </parent>
 
     <artifactId>o11yphant-trace-core</artifactId>
diff --git a/trace/helper-httpclient/pom.xml b/trace/helper-httpclient/pom.xml
index a0774068..d5d023db 100644
--- a/trace/helper-httpclient/pom.xml
+++ b/trace/helper-httpclient/pom.xml
@@ -22,7 +22,7 @@
     <parent>
         <groupId>org.commonjava.util</groupId>
         <artifactId>o11yphant-trace</artifactId>
-        <version>1.9.1-SNAPSHOT</version>
+        <version>1.9.1</version>
     </parent>
 
     <artifactId>o11yphant-trace-helper-httpclient</artifactId>
diff --git a/trace/helper-jhttpc/pom.xml b/trace/helper-jhttpc/pom.xml
index 2ed5b9d5..a0d2e54c 100644
--- a/trace/helper-jhttpc/pom.xml
+++ b/trace/helper-jhttpc/pom.xml
@@ -22,7 +22,7 @@
     <parent>
         <groupId>org.commonjava.util</groupId>
         <artifactId>o11yphant-trace</artifactId>
-        <version>1.9.1-SNAPSHOT</version>
+        <version>1.9.1</version>
     </parent>
 
     <artifactId>o11yphant-trace-helper-jhttpc</artifactId>
diff --git a/trace/helper-servlet/pom.xml b/trace/helper-servlet/pom.xml
index ead8ca81..c998ab54 100644
--- a/trace/helper-servlet/pom.xml
+++ b/trace/helper-servlet/pom.xml
@@ -22,7 +22,7 @@
     <parent>
         <groupId>org.commonjava.util</groupId>
         <artifactId>o11yphant-trace</artifactId>
-        <version>1.9.1-SNAPSHOT</version>
+        <version>1.9.1</version>
     </parent>
 
     <artifactId>o11yphant-trace-helper-servlet</artifactId>
diff --git a/trace/otel/pom.xml b/trace/otel/pom.xml
index 27d6e55b..cd11b2d6 100644
--- a/trace/otel/pom.xml
+++ b/trace/otel/pom.xml
@@ -22,7 +22,7 @@
     <parent>
         <groupId>org.commonjava.util</groupId>
         <artifactId>o11yphant-trace</artifactId>
-        <version>1.9.1-SNAPSHOT</version>
+        <version>1.9.1</version>
     </parent>
 
     <artifactId>o11yphant-trace-otel</artifactId>
diff --git a/trace/pom.xml b/trace/pom.xml
index 59236094..084a2f7f 100644
--- a/trace/pom.xml
+++ b/trace/pom.xml
@@ -20,7 +20,7 @@
   <parent>
     <artifactId>o11yphant</artifactId>
     <groupId>org.commonjava.util</groupId>
-    <version>1.9.1-SNAPSHOT</version>
+    <version>1.9.1</version>
   </parent>
   <modelVersion>4.0.0</modelVersion>