diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9ac144867..8d2e9ecee 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,12 @@
 # Changelog
 
+## [2.8.1](https://github.com/googleapis/google-api-java-client/compare/v2.8.0...v2.8.1) (2025-08-14)
+
+
+### Bug Fixes
+
+* **deps:** Update project.http.version to v2 ([#2598](https://github.com/googleapis/google-api-java-client/issues/2598)) ([4874da1](https://github.com/googleapis/google-api-java-client/commit/4874da1d295868c2249af57973c0c2c1042e426b))
+
 ## [2.8.0](https://github.com/googleapis/google-api-java-client/compare/v2.7.2...v2.8.0) (2025-05-20)
 
 
diff --git a/google-api-client-android/pom.xml b/google-api-client-android/pom.xml
index 2e87acb80..dff11f5d6 100644
--- a/google-api-client-android/pom.xml
+++ b/google-api-client-android/pom.xml
@@ -4,7 +4,7 @@
   <parent>
     <groupId>com.google.api-client</groupId>
     <artifactId>google-api-client-parent</artifactId>
-    <version>2.8.1-SNAPSHOT</version><!-- {x-version-update:google-api-client:current} -->
+    <version>2.8.1</version><!-- {x-version-update:google-api-client:current} -->
     <relativePath>../pom.xml</relativePath>
   </parent>
   <artifactId>google-api-client-android</artifactId>
diff --git a/google-api-client-apache-v5/pom.xml b/google-api-client-apache-v5/pom.xml
index d4df1e143..26c0fceab 100644
--- a/google-api-client-apache-v5/pom.xml
+++ b/google-api-client-apache-v5/pom.xml
@@ -6,7 +6,7 @@
     <parent>
         <groupId>com.google.api-client</groupId>
         <artifactId>google-api-client-parent</artifactId>
-        <version>2.8.1-SNAPSHOT</version><!-- {x-version-update:google-api-client:current} -->
+        <version>2.8.1</version><!-- {x-version-update:google-api-client:current} -->
     </parent>
     <artifactId>google-api-client-apache-v5</artifactId>
     <name>Apache extensions to the Google APIs Client Library for Java</name>
diff --git a/google-api-client-appengine/pom.xml b/google-api-client-appengine/pom.xml
index 3a259d2a9..b83b7442e 100644
--- a/google-api-client-appengine/pom.xml
+++ b/google-api-client-appengine/pom.xml
@@ -4,7 +4,7 @@
   <parent>
     <groupId>com.google.api-client</groupId>
     <artifactId>google-api-client-parent</artifactId>
-    <version>2.8.1-SNAPSHOT</version><!-- {x-version-update:google-api-client:current} -->
+    <version>2.8.1</version><!-- {x-version-update:google-api-client:current} -->
     <relativePath>../pom.xml</relativePath>
   </parent>
   <artifactId>google-api-client-appengine</artifactId>
diff --git a/google-api-client-assembly/pom.xml b/google-api-client-assembly/pom.xml
index 309d4883f..b5520eeca 100644
--- a/google-api-client-assembly/pom.xml
+++ b/google-api-client-assembly/pom.xml
@@ -4,7 +4,7 @@
   <parent>
     <groupId>com.google.api-client</groupId>
     <artifactId>google-api-client-parent</artifactId>
-    <version>2.8.1-SNAPSHOT</version><!-- {x-version-update:google-api-client:current} -->
+    <version>2.8.1</version><!-- {x-version-update:google-api-client:current} -->
     <relativePath>../pom.xml</relativePath>
   </parent>
   <groupId>com.google.api-client</groupId>
diff --git a/google-api-client-bom/pom.xml b/google-api-client-bom/pom.xml
index 55221d207..d8670898c 100644
--- a/google-api-client-bom/pom.xml
+++ b/google-api-client-bom/pom.xml
@@ -3,7 +3,7 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>com.google.api-client</groupId>
   <artifactId>google-api-client-bom</artifactId>
-  <version>2.8.1-SNAPSHOT</version><!-- {x-version-update:google-api-client:current} -->
+  <version>2.8.1</version><!-- {x-version-update:google-api-client:current} -->
   <packaging>pom</packaging>
 
   <name>Google API Client Library for Java BOM</name>
@@ -63,48 +63,48 @@
       <dependency>
         <groupId>com.google.api-client</groupId>
         <artifactId>google-api-client</artifactId>
-        <version>2.8.1-SNAPSHOT</version><!-- {x-version-update:google-api-client:current} -->
+        <version>2.8.1</version><!-- {x-version-update:google-api-client:current} -->
       </dependency>
       <dependency>
         <groupId>com.google.api-client</groupId>
         <artifactId>google-api-client-android</artifactId>
-        <version>2.8.1-SNAPSHOT</version><!-- {x-version-update:google-api-client:current} -->
+        <version>2.8.1</version><!-- {x-version-update:google-api-client:current} -->
       </dependency>
       <dependency>
         <groupId>com.google.api-client</groupId>
         <artifactId>google-api-client-appengine</artifactId>
-        <version>2.8.1-SNAPSHOT</version><!-- {x-version-update:google-api-client:current} -->
+        <version>2.8.1</version><!-- {x-version-update:google-api-client:current} -->
       </dependency>
       <dependency>
         <groupId>com.google.api-client</groupId>
         <artifactId>google-api-client-assembly</artifactId>
-        <version>2.8.1-SNAPSHOT</version><!-- {x-version-update:google-api-client:current} -->
+        <version>2.8.1</version><!-- {x-version-update:google-api-client:current} -->
         <type>pom</type>
       </dependency>
       <dependency>
         <groupId>com.google.api-client</groupId>
         <artifactId>google-api-client-gson</artifactId>
-        <version>2.8.1-SNAPSHOT</version><!-- {x-version-update:google-api-client:current} -->
+        <version>2.8.1</version><!-- {x-version-update:google-api-client:current} -->
       </dependency>
       <dependency>
         <groupId>com.google.api-client</groupId>
         <artifactId>google-api-client-jackson2</artifactId>
-        <version>2.8.1-SNAPSHOT</version><!-- {x-version-update:google-api-client:current} -->
+        <version>2.8.1</version><!-- {x-version-update:google-api-client:current} -->
       </dependency>
       <dependency>
         <groupId>com.google.api-client</groupId>
         <artifactId>google-api-client-protobuf</artifactId>
-        <version>2.8.1-SNAPSHOT</version><!-- {x-version-update:google-api-client:current} -->
+        <version>2.8.1</version><!-- {x-version-update:google-api-client:current} -->
       </dependency>
       <dependency>
         <groupId>com.google.api-client</groupId>
         <artifactId>google-api-client-servlet</artifactId>
-        <version>2.8.1-SNAPSHOT</version><!-- {x-version-update:google-api-client:current} -->
+        <version>2.8.1</version><!-- {x-version-update:google-api-client:current} -->
       </dependency>
       <dependency>
         <groupId>com.google.api-client</groupId>
         <artifactId>google-api-client-xml</artifactId>
-        <version>2.8.1-SNAPSHOT</version><!-- {x-version-update:google-api-client:current} -->
+        <version>2.8.1</version><!-- {x-version-update:google-api-client:current} -->
       </dependency>
     </dependencies>
   </dependencyManagement>
diff --git a/google-api-client-gson/pom.xml b/google-api-client-gson/pom.xml
index 2c459ca89..55f5fd64a 100644
--- a/google-api-client-gson/pom.xml
+++ b/google-api-client-gson/pom.xml
@@ -4,7 +4,7 @@
   <parent>
     <groupId>com.google.api-client</groupId>
     <artifactId>google-api-client-parent</artifactId>
-    <version>2.8.1-SNAPSHOT</version><!-- {x-version-update:google-api-client:current} -->
+    <version>2.8.1</version><!-- {x-version-update:google-api-client:current} -->
     <relativePath>../pom.xml</relativePath>
   </parent>
   <artifactId>google-api-client-gson</artifactId>
diff --git a/google-api-client-jackson2/pom.xml b/google-api-client-jackson2/pom.xml
index 682327b53..841b1b507 100644
--- a/google-api-client-jackson2/pom.xml
+++ b/google-api-client-jackson2/pom.xml
@@ -4,7 +4,7 @@
   <parent>
     <groupId>com.google.api-client</groupId>
     <artifactId>google-api-client-parent</artifactId>
-    <version>2.8.1-SNAPSHOT</version><!-- {x-version-update:google-api-client:current} -->
+    <version>2.8.1</version><!-- {x-version-update:google-api-client:current} -->
     <relativePath>../pom.xml</relativePath>
   </parent>
   <artifactId>google-api-client-jackson2</artifactId>
diff --git a/google-api-client-protobuf/pom.xml b/google-api-client-protobuf/pom.xml
index 7fbb61928..7b375fcf0 100644
--- a/google-api-client-protobuf/pom.xml
+++ b/google-api-client-protobuf/pom.xml
@@ -4,7 +4,7 @@
   <parent>
     <groupId>com.google.api-client</groupId>
     <artifactId>google-api-client-parent</artifactId>
-    <version>2.8.1-SNAPSHOT</version><!-- {x-version-update:google-api-client:current} -->
+    <version>2.8.1</version><!-- {x-version-update:google-api-client:current} -->
     <relativePath>../pom.xml</relativePath>
   </parent>
   <artifactId>google-api-client-protobuf</artifactId>
diff --git a/google-api-client-servlet/pom.xml b/google-api-client-servlet/pom.xml
index b5bef3947..fe7d689cd 100644
--- a/google-api-client-servlet/pom.xml
+++ b/google-api-client-servlet/pom.xml
@@ -4,7 +4,7 @@
   <parent>
     <groupId>com.google.api-client</groupId>
     <artifactId>google-api-client-parent</artifactId>
-    <version>2.8.1-SNAPSHOT</version><!-- {x-version-update:google-api-client:current} -->
+    <version>2.8.1</version><!-- {x-version-update:google-api-client:current} -->
     <relativePath>../pom.xml</relativePath>
   </parent>
   <artifactId>google-api-client-servlet</artifactId>
diff --git a/google-api-client-xml/pom.xml b/google-api-client-xml/pom.xml
index aa9a246aa..e45527feb 100644
--- a/google-api-client-xml/pom.xml
+++ b/google-api-client-xml/pom.xml
@@ -4,7 +4,7 @@
   <parent>
     <groupId>com.google.api-client</groupId>
     <artifactId>google-api-client-parent</artifactId>
-    <version>2.8.1-SNAPSHOT</version><!-- {x-version-update:google-api-client:current} -->
+    <version>2.8.1</version><!-- {x-version-update:google-api-client:current} -->
     <relativePath>../pom.xml</relativePath>
   </parent>
   <artifactId>google-api-client-xml</artifactId>
diff --git a/google-api-client/pom.xml b/google-api-client/pom.xml
index 2dcd89265..8de47af75 100644
--- a/google-api-client/pom.xml
+++ b/google-api-client/pom.xml
@@ -4,7 +4,7 @@
   <parent>
     <groupId>com.google.api-client</groupId>
     <artifactId>google-api-client-parent</artifactId>
-    <version>2.8.1-SNAPSHOT</version><!-- {x-version-update:google-api-client:current} -->
+    <version>2.8.1</version><!-- {x-version-update:google-api-client:current} -->
     <relativePath>../pom.xml</relativePath>
   </parent>
   <artifactId>google-api-client</artifactId>
diff --git a/pom.xml b/pom.xml
index a4ff08f4d..64886d929 100644
--- a/pom.xml
+++ b/pom.xml
@@ -4,7 +4,7 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>com.google.api-client</groupId>
   <artifactId>google-api-client-parent</artifactId>
-  <version>2.8.1-SNAPSHOT</version><!-- {x-version-update:google-api-client:current} -->
+  <version>2.8.1</version><!-- {x-version-update:google-api-client:current} -->
   <packaging>pom</packaging>
   <name>Parent for the Google API Client Library for Java</name>
   <description>The Google APIs Client Library for Java is a Java client library
diff --git a/versions.txt b/versions.txt
index 2a2a5b269..a360071b6 100644
--- a/versions.txt
+++ b/versions.txt
@@ -1,4 +1,4 @@
 # Format:
 # module:released-version:current-version
 
-google-api-client:2.8.0:2.8.1-SNAPSHOT
+google-api-client:2.8.1:2.8.1