diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index 3800c0691..064e56a8b 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1,3 +1,3 @@
 {
-    ".": "1.8.0"
+    ".": "1.8.1"
 }
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3e13779af..1aab07c92 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,12 @@
 # Changelog
 
+## [1.8.1](https://github.com/google/adk-java/compare/v1.8.0...v1.8.1) (2026-08-19)
+
+
+### Bug Fixes
+
+* update Java ADK ResponseConverter to propagate long-running tool IDs on AUTH_REQUIRED state ([2d20d1b](https://github.com/google/adk-java/commit/2d20d1b213a0cc98994be9cf3ed5e070abed6df2))
+
 ## [1.8.0](https://github.com/google/adk-java/compare/v1.7.1...v1.8.0) (2026-08-13)
 
 
diff --git a/README.md b/README.md
index b5747e371..bfbcfbb53 100644
--- a/README.md
+++ b/README.md
@@ -50,13 +50,13 @@ If you're using Maven, add the following to your dependencies:
 <dependency>
   <groupId>com.google.adk</groupId>
   <artifactId>google-adk</artifactId>
-  <version>1.8.0</version>
+  <version>1.8.1</version>
 </dependency>
 <!-- Dev UI -->
 <dependency>
     <groupId>com.google.adk</groupId>
     <artifactId>google-adk-dev</artifactId>
-    <version>1.8.0</version>
+    <version>1.8.1</version>
 </dependency>
 ```
 
diff --git a/a2a/pom.xml b/a2a/pom.xml
index d47739a89..01c3b822c 100644
--- a/a2a/pom.xml
+++ b/a2a/pom.xml
@@ -5,7 +5,7 @@
   <parent>
     <groupId>com.google.adk</groupId>
     <artifactId>google-adk-parent</artifactId>
-    <version>1.8.1-SNAPSHOT</version><!-- {x-version-update:google-adk:current} -->
+    <version>1.8.1</version><!-- {x-version-update:google-adk:current} -->
   </parent>
 
   <artifactId>google-adk-a2a</artifactId>
diff --git a/contrib/firestore-session-service/pom.xml b/contrib/firestore-session-service/pom.xml
index 6dba2ec2b..d51ace590 100644
--- a/contrib/firestore-session-service/pom.xml
+++ b/contrib/firestore-session-service/pom.xml
@@ -20,7 +20,7 @@
     <parent>
         <groupId>com.google.adk</groupId>
         <artifactId>google-adk-parent</artifactId>
-        <version>1.8.1-SNAPSHOT</version><!-- {x-version-update:google-adk:current} -->
+        <version>1.8.1</version><!-- {x-version-update:google-adk:current} -->
         <relativePath>../../pom.xml</relativePath>
     </parent>
 
diff --git a/contrib/langchain4j/pom.xml b/contrib/langchain4j/pom.xml
index f69e1877b..4cfddfedf 100644
--- a/contrib/langchain4j/pom.xml
+++ b/contrib/langchain4j/pom.xml
@@ -20,7 +20,7 @@
     <parent>
         <groupId>com.google.adk</groupId>
         <artifactId>google-adk-parent</artifactId>
-        <version>1.8.1-SNAPSHOT</version><!-- {x-version-update:google-adk:current} -->
+        <version>1.8.1</version><!-- {x-version-update:google-adk:current} -->
         <relativePath>../../pom.xml</relativePath>
     </parent>
 
diff --git a/contrib/planners/pom.xml b/contrib/planners/pom.xml
index 7d59ac8a9..208d1487a 100644
--- a/contrib/planners/pom.xml
+++ b/contrib/planners/pom.xml
@@ -20,7 +20,7 @@
     <parent>
         <groupId>com.google.adk</groupId>
         <artifactId>google-adk-parent</artifactId>
-        <version>1.8.1-SNAPSHOT</version><!-- {x-version-update:google-adk:current} -->
+        <version>1.8.1</version><!-- {x-version-update:google-adk:current} -->
         <relativePath>../../pom.xml</relativePath>
     </parent>
 
diff --git a/contrib/samples/a2a_basic/pom.xml b/contrib/samples/a2a_basic/pom.xml
index 5d4804549..7637e68c2 100644
--- a/contrib/samples/a2a_basic/pom.xml
+++ b/contrib/samples/a2a_basic/pom.xml
@@ -5,7 +5,7 @@
   <parent>
     <groupId>com.google.adk</groupId>
     <artifactId>google-adk-samples</artifactId>
-    <version>1.8.1-SNAPSHOT</version><!-- {x-version-update:google-adk:current} -->
+    <version>1.8.1</version><!-- {x-version-update:google-adk:current} -->
     <relativePath>..</relativePath>
   </parent>
 
diff --git a/contrib/samples/a2a_server/pom.xml b/contrib/samples/a2a_server/pom.xml
index 5a19461f2..705b6b27c 100644
--- a/contrib/samples/a2a_server/pom.xml
+++ b/contrib/samples/a2a_server/pom.xml
@@ -5,7 +5,7 @@
   <parent>
     <groupId>com.google.adk</groupId>
     <artifactId>google-adk-samples</artifactId>
-    <version>1.8.1-SNAPSHOT</version><!-- {x-version-update:google-adk:current} -->
+    <version>1.8.1</version><!-- {x-version-update:google-adk:current} -->
     <relativePath>..</relativePath>
   </parent>
 
diff --git a/contrib/samples/configagent/pom.xml b/contrib/samples/configagent/pom.xml
index cc1c77999..ea8006dd8 100644
--- a/contrib/samples/configagent/pom.xml
+++ b/contrib/samples/configagent/pom.xml
@@ -5,7 +5,7 @@
     <parent>
         <groupId>com.google.adk</groupId>
         <artifactId>google-adk-samples</artifactId>
-        <version>1.8.1-SNAPSHOT</version><!-- {x-version-update:google-adk:current} -->
+        <version>1.8.1</version><!-- {x-version-update:google-adk:current} -->
         <relativePath>..</relativePath>
     </parent>
 
diff --git a/contrib/samples/github/adkprtriaging/pom.xml b/contrib/samples/github/adkprtriaging/pom.xml
index 82ea614b0..95f3ad9d1 100644
--- a/contrib/samples/github/adkprtriaging/pom.xml
+++ b/contrib/samples/github/adkprtriaging/pom.xml
@@ -20,7 +20,7 @@
     <parent>
         <groupId>com.google.adk</groupId>
         <artifactId>google-adk-samples</artifactId>
-        <version>1.8.1-SNAPSHOT</version><!-- {x-version-update:google-adk:current} -->
+        <version>1.8.1</version><!-- {x-version-update:google-adk:current} -->
         <relativePath>../..</relativePath>
     </parent>
 
diff --git a/contrib/samples/github/adkreleasedocs/pom.xml b/contrib/samples/github/adkreleasedocs/pom.xml
index 8d4027cc6..510fd084e 100644
--- a/contrib/samples/github/adkreleasedocs/pom.xml
+++ b/contrib/samples/github/adkreleasedocs/pom.xml
@@ -20,7 +20,7 @@
     <parent>
         <groupId>com.google.adk</groupId>
         <artifactId>google-adk-samples</artifactId>
-        <version>1.8.1-SNAPSHOT</version><!-- {x-version-update:google-adk:current} -->
+        <version>1.8.1</version><!-- {x-version-update:google-adk:current} -->
         <relativePath>../..</relativePath>
     </parent>
 
diff --git a/contrib/samples/github/adkspam/pom.xml b/contrib/samples/github/adkspam/pom.xml
index b5100a883..0d3aaea11 100644
--- a/contrib/samples/github/adkspam/pom.xml
+++ b/contrib/samples/github/adkspam/pom.xml
@@ -20,7 +20,7 @@
     <parent>
         <groupId>com.google.adk</groupId>
         <artifactId>google-adk-samples</artifactId>
-        <version>1.8.1-SNAPSHOT</version><!-- {x-version-update:google-adk:current} -->
+        <version>1.8.1</version><!-- {x-version-update:google-adk:current} -->
         <relativePath>../..</relativePath>
     </parent>
 
diff --git a/contrib/samples/github/adkstale/pom.xml b/contrib/samples/github/adkstale/pom.xml
index 55b06cf4c..2dcc4cd8f 100644
--- a/contrib/samples/github/adkstale/pom.xml
+++ b/contrib/samples/github/adkstale/pom.xml
@@ -20,7 +20,7 @@
     <parent>
         <groupId>com.google.adk</groupId>
         <artifactId>google-adk-samples</artifactId>
-        <version>1.8.1-SNAPSHOT</version><!-- {x-version-update:google-adk:current} -->
+        <version>1.8.1</version><!-- {x-version-update:google-adk:current} -->
         <relativePath>../..</relativePath>
     </parent>
 
diff --git a/contrib/samples/github/adktriaging/pom.xml b/contrib/samples/github/adktriaging/pom.xml
index 70f106529..6d5750d57 100644
--- a/contrib/samples/github/adktriaging/pom.xml
+++ b/contrib/samples/github/adktriaging/pom.xml
@@ -20,7 +20,7 @@
     <parent>
         <groupId>com.google.adk</groupId>
         <artifactId>google-adk-samples</artifactId>
-        <version>1.8.1-SNAPSHOT</version><!-- {x-version-update:google-adk:current} -->
+        <version>1.8.1</version><!-- {x-version-update:google-adk:current} -->
         <relativePath>../..</relativePath>
     </parent>
 
diff --git a/contrib/samples/github/githubtools/pom.xml b/contrib/samples/github/githubtools/pom.xml
index eb477d7b8..580d34862 100644
--- a/contrib/samples/github/githubtools/pom.xml
+++ b/contrib/samples/github/githubtools/pom.xml
@@ -20,7 +20,7 @@
     <parent>
         <groupId>com.google.adk</groupId>
         <artifactId>google-adk-samples</artifactId>
-        <version>1.8.1-SNAPSHOT</version><!-- {x-version-update:google-adk:current} -->
+        <version>1.8.1</version><!-- {x-version-update:google-adk:current} -->
         <relativePath>../..</relativePath>
     </parent>
 
diff --git a/contrib/samples/helloworld/pom.xml b/contrib/samples/helloworld/pom.xml
index 724df6ab9..3d29dac8c 100644
--- a/contrib/samples/helloworld/pom.xml
+++ b/contrib/samples/helloworld/pom.xml
@@ -20,7 +20,7 @@
     <parent>
         <groupId>com.google.adk</groupId>
         <artifactId>google-adk-samples</artifactId>
-        <version>1.8.1-SNAPSHOT</version><!-- {x-version-update:google-adk:current} -->
+        <version>1.8.1</version><!-- {x-version-update:google-adk:current} -->
         <relativePath>..</relativePath>
     </parent>
 
diff --git a/contrib/samples/mcpfilesystem/pom.xml b/contrib/samples/mcpfilesystem/pom.xml
index 7210fe7a2..785e974a0 100644
--- a/contrib/samples/mcpfilesystem/pom.xml
+++ b/contrib/samples/mcpfilesystem/pom.xml
@@ -20,7 +20,7 @@
     <parent>
         <groupId>com.google.adk</groupId>
         <artifactId>google-adk-parent</artifactId>
-        <version>1.8.1-SNAPSHOT</version><!-- {x-version-update:google-adk:current} -->
+        <version>1.8.1</version><!-- {x-version-update:google-adk:current} -->
         <relativePath>../../..</relativePath>
     </parent>
 
diff --git a/contrib/samples/pom.xml b/contrib/samples/pom.xml
index 60c996f72..3b604890f 100644
--- a/contrib/samples/pom.xml
+++ b/contrib/samples/pom.xml
@@ -5,7 +5,7 @@
   <parent>
     <groupId>com.google.adk</groupId>
     <artifactId>google-adk-parent</artifactId>
-    <version>1.8.1-SNAPSHOT</version><!-- {x-version-update:google-adk:current} -->
+    <version>1.8.1</version><!-- {x-version-update:google-adk:current} -->
     <relativePath>../..</relativePath>
   </parent>
 
diff --git a/contrib/spring-ai/pom.xml b/contrib/spring-ai/pom.xml
index fb2260f02..b41de9b8f 100644
--- a/contrib/spring-ai/pom.xml
+++ b/contrib/spring-ai/pom.xml
@@ -20,7 +20,7 @@
     <parent>
         <groupId>com.google.adk</groupId>
         <artifactId>google-adk-parent</artifactId>
-        <version>1.8.1-SNAPSHOT</version><!-- {x-version-update:google-adk:current} -->
+        <version>1.8.1</version><!-- {x-version-update:google-adk:current} -->
         <relativePath>../../pom.xml</relativePath>
     </parent>
 
diff --git a/core/pom.xml b/core/pom.xml
index 4ffe176d4..5f923c305 100644
--- a/core/pom.xml
+++ b/core/pom.xml
@@ -20,7 +20,7 @@
   <parent>
     <groupId>com.google.adk</groupId>
     <artifactId>google-adk-parent</artifactId>
-    <version>1.8.1-SNAPSHOT</version><!-- {x-version-update:google-adk:current} -->
+    <version>1.8.1</version><!-- {x-version-update:google-adk:current} -->
   </parent>
 
   <artifactId>google-adk</artifactId>
diff --git a/core/src/main/java/com/google/adk/Version.java b/core/src/main/java/com/google/adk/Version.java
index 9a196e60b..838235c92 100644
--- a/core/src/main/java/com/google/adk/Version.java
+++ b/core/src/main/java/com/google/adk/Version.java
@@ -22,7 +22,7 @@
  */
 public final class Version {
   // Don't touch this, release-please should keep it up to date.
-  public static final String JAVA_ADK_VERSION = "1.8.0"; // x-release-please-released-version
+  public static final String JAVA_ADK_VERSION = "1.8.1"; // x-release-please-released-version
 
   private Version() {}
 }
diff --git a/dev/pom.xml b/dev/pom.xml
index aba1d13a7..4aceb870c 100644
--- a/dev/pom.xml
+++ b/dev/pom.xml
@@ -18,7 +18,7 @@
   <parent>
     <groupId>com.google.adk</groupId>
     <artifactId>google-adk-parent</artifactId>
-    <version>1.8.1-SNAPSHOT</version><!-- {x-version-update:google-adk:current} -->
+    <version>1.8.1</version><!-- {x-version-update:google-adk:current} -->
   </parent>
 
   <artifactId>google-adk-dev</artifactId>
diff --git a/maven_plugin/examples/custom_tools/pom.xml b/maven_plugin/examples/custom_tools/pom.xml
index 78c6f500e..55000c052 100644
--- a/maven_plugin/examples/custom_tools/pom.xml
+++ b/maven_plugin/examples/custom_tools/pom.xml
@@ -4,7 +4,7 @@
 
     <groupId>com.example</groupId>
     <artifactId>custom-tools-example</artifactId>
-    <version>1.8.1-SNAPSHOT</version><!-- {x-version-update:google-adk:current} -->
+    <version>1.8.1</version><!-- {x-version-update:google-adk:current} -->
     <packaging>jar</packaging>
 
     <name>ADK Custom Tools Example</name>
diff --git a/maven_plugin/examples/simple-agent/pom.xml b/maven_plugin/examples/simple-agent/pom.xml
index f6480247c..8ff03fd94 100644
--- a/maven_plugin/examples/simple-agent/pom.xml
+++ b/maven_plugin/examples/simple-agent/pom.xml
@@ -4,7 +4,7 @@
 
     <groupId>com.example</groupId>
     <artifactId>simple-adk-agent</artifactId>
-    <version>1.8.1-SNAPSHOT</version><!-- {x-version-update:google-adk:current} -->
+    <version>1.8.1</version><!-- {x-version-update:google-adk:current} -->
     <packaging>jar</packaging>
 
     <name>Simple ADK Agent Example</name>
diff --git a/maven_plugin/pom.xml b/maven_plugin/pom.xml
index e4adca2a2..977675d18 100644
--- a/maven_plugin/pom.xml
+++ b/maven_plugin/pom.xml
@@ -5,7 +5,7 @@
     <parent>
         <groupId>com.google.adk</groupId>
         <artifactId>google-adk-parent</artifactId>
-        <version>1.8.1-SNAPSHOT</version><!-- {x-version-update:google-adk:current} -->
+        <version>1.8.1</version><!-- {x-version-update:google-adk:current} -->
         <relativePath>../pom.xml</relativePath>
     </parent>
 
diff --git a/pom.xml b/pom.xml
index 4ed57dab5..9ff49d270 100644
--- a/pom.xml
+++ b/pom.xml
@@ -17,7 +17,7 @@
 
   <groupId>com.google.adk</groupId>
   <artifactId>google-adk-parent</artifactId>
-  <version>1.8.1-SNAPSHOT</version><!-- {x-version-update:google-adk:current} -->
+  <version>1.8.1</version><!-- {x-version-update:google-adk:current} -->
   <packaging>pom</packaging>
 
   <name>Google Agent Development Kit Maven Parent POM</name>
diff --git a/tutorials/city-time-weather/pom.xml b/tutorials/city-time-weather/pom.xml
index 626a60c4c..5ab288a9a 100644
--- a/tutorials/city-time-weather/pom.xml
+++ b/tutorials/city-time-weather/pom.xml
@@ -20,7 +20,7 @@
   <parent>
     <groupId>com.google.adk</groupId>
     <artifactId>google-adk-parent</artifactId>
-    <version>1.8.1-SNAPSHOT</version><!-- {x-version-update:google-adk:current} -->
+    <version>1.8.1</version><!-- {x-version-update:google-adk:current} -->
     <relativePath>../../pom.xml</relativePath>
   </parent>
 
diff --git a/tutorials/live-audio-single-agent/pom.xml b/tutorials/live-audio-single-agent/pom.xml
index 50cebaadd..b9ce22e40 100644
--- a/tutorials/live-audio-single-agent/pom.xml
+++ b/tutorials/live-audio-single-agent/pom.xml
@@ -20,7 +20,7 @@
   <parent>
     <groupId>com.google.adk</groupId>
     <artifactId>google-adk-parent</artifactId>
-    <version>1.8.1-SNAPSHOT</version><!-- {x-version-update:google-adk:current} -->
+    <version>1.8.1</version><!-- {x-version-update:google-adk:current} -->
     <relativePath>../../pom.xml</relativePath>
   </parent>