diff --git a/README.md b/README.md
index e6f8c3e..8baa6cf 100644
--- a/README.md
+++ b/README.md
@@ -30,7 +30,7 @@ Add the following dependency to your `pom.xml`:
 <dependency>
     <groupId>ai.z.openapi</groupId>
     <artifactId>zai-sdk</artifactId>
-    <version>0.1.3</version>
+    <version>0.3.0</version>
 </dependency>
 ```
 
@@ -39,7 +39,7 @@ Add the following dependency to your `build.gradle` (for Groovy DSL):
 
 ```groovy
 dependencies {
-    implementation 'ai.z.openapi:zai-sdk:0.1.3'
+    implementation 'ai.z.openapi:zai-sdk:0.3.0'
 }
 ```
 
diff --git a/README_CN.md b/README_CN.md
index 2179c8b..e0404fc 100644
--- a/README_CN.md
+++ b/README_CN.md
@@ -30,7 +30,7 @@ Z.ai AI 平台官方 Java SDK，提供统一接口访问强大的AI能力，包
 <dependency>
     <groupId>ai.z.openapi</groupId>
     <artifactId>zai-sdk</artifactId>
-    <version>0.1.3</version>
+    <version>0.3.0</version>
 </dependency>
 ```
 
@@ -39,7 +39,7 @@ Z.ai AI 平台官方 Java SDK，提供统一接口访问强大的AI能力，包
 
 ```groovy
 dependencies {
-    implementation 'ai.z.openapi:zai-sdk:0.1.3'
+    implementation 'ai.z.openapi:zai-sdk:0.3.0'
 }
 ```
 
diff --git a/core/src/main/java/ai/z/openapi/core/config/ZaiConfig.java b/core/src/main/java/ai/z/openapi/core/config/ZaiConfig.java
index bad6fe7..bde6e02 100644
--- a/core/src/main/java/ai/z/openapi/core/config/ZaiConfig.java
+++ b/core/src/main/java/ai/z/openapi/core/config/ZaiConfig.java
@@ -161,9 +161,7 @@ public String getBaseUrl() {
 		if (baseUrl != null) {
 			return baseUrl;
 		}
-		String propValue = System.getProperty(ENV_BASE_URL);
-		propValue = propValue != null ? propValue : System.getenv(ENV_BASE_URL);
-		return propValue != null ? propValue : Z_AI_BASE_URL;
+		return System.getProperty(ENV_BASE_URL);
 	}
 
 	/**
diff --git a/pom.xml b/pom.xml
index f9c0b72..b8abb15 100644
--- a/pom.xml
+++ b/pom.xml
@@ -45,7 +45,7 @@
     </scm>
 
     <properties>
-        <revision>0.2.0</revision>
+        <revision>0.3.0</revision>
         <java.version>8</java.version>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>