diff --git a/CHANGELOG.md b/CHANGELOG.md
index 74b4fe12..95d2bdfe 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,16 @@
+# Version 3.5.5 (June 30, 2026)
+- [New](https://github.com/segmentio/analytics-java/pull/531) Unified HTTP response handling and retry behavior
+  - Retryable statuses (429, 408, 410, 460, 5xx except 501/505/511) check Retry-After header first, fall back to exponential backoff
+  - Retry-After supports numeric seconds and RFC 7231 HTTP-date format, capped at 300s
+  - Rate-limited retries do not count against maxRetries
+  - Looper defers batch submission while rate-limited
+  - Default backoff: 500ms base, 1min cap, 10 retries
+  - New Builder options: `maxTotalBackoffDuration()`, `maxRateLimitDuration()` (default 12h each)
+- [New](https://github.com/segmentio/analytics-java/pull/531) `offer()` non-blocking alternative to `enqueue()` with byte-size validation and backpressure handling
+- [New](https://github.com/segmentio/analytics-java/pull/531) X-Retry-Count header sent on retries
+- [New](https://github.com/segmentio/analytics-java/pull/531) Authorization header (Basic auth) added to all requests
+- [Fix](https://github.com/segmentio/analytics-java/pull/531) Network executor shutdown now waits 75s for in-flight uploads to complete
+
 # Version 3.5.4 (Dec 5, 2025)
 - Updating release for new sonatype repository
 
diff --git a/analytics-cli/pom.xml b/analytics-cli/pom.xml
index 67e1d4b9..4de52f3c 100644
--- a/analytics-cli/pom.xml
+++ b/analytics-cli/pom.xml
@@ -6,12 +6,12 @@
   <parent>
     <artifactId>analytics-parent</artifactId>
     <groupId>com.segment.analytics.java</groupId>
-    <version>3.5.5-SNAPSHOT</version>
+    <version>3.5.6-SNAPSHOT</version>
   </parent>
 
   <groupId>com.segment.analytics.java</groupId>
   <artifactId>analytics-cli</artifactId>
-  <version>3.5.5-SNAPSHOT</version>
+  <version>3.5.6-SNAPSHOT</version>
   <name>Analytics Java CLI</name>
 
   <description>Command-line interface for Segment Analytics for Java.</description>
@@ -28,7 +28,7 @@
     <url>https://github.com/segmentio/analytics-java/</url>
     <connection>scm:git:https://github.com/segmentio/analytics-java.git</connection>
     <developerConnection>scm:git:git@github.com:segmentio/analytics-java.git</developerConnection>
-    <tag>analytics-parent-3.5.4</tag>
+    <tag>analytics-parent-3.5.5</tag>
   </scm>
 
   <developers>
diff --git a/analytics-core/pom.xml b/analytics-core/pom.xml
index e2db32c3..4c0ed0cd 100644
--- a/analytics-core/pom.xml
+++ b/analytics-core/pom.xml
@@ -6,12 +6,12 @@
   <parent>
     <groupId>com.segment.analytics.java</groupId>
     <artifactId>analytics-parent</artifactId>
-    <version>3.5.5-SNAPSHOT</version>
+    <version>3.5.6-SNAPSHOT</version>
   </parent>
 
   <groupId>com.segment.analytics.java</groupId>
   <artifactId>analytics-core</artifactId>
-  <version>3.5.5-SNAPSHOT</version>
+  <version>3.5.6-SNAPSHOT</version>
   <name>Analytics for Java (Core)</name>
 
   <description>Core runtime for Segment Analytics for Java.</description>
@@ -28,7 +28,7 @@
     <url>https://github.com/segmentio/analytics-java/</url>
     <connection>scm:git:https://github.com/segmentio/analytics-java.git</connection>
     <developerConnection>scm:git:git@github.com:segmentio/analytics-java.git</developerConnection>
-    <tag>analytics-parent-3.5.4</tag>
+    <tag>analytics-parent-3.5.5</tag>
   </scm>
 
   <developers>
diff --git a/analytics-sample/pom.xml b/analytics-sample/pom.xml
index 4794d406..f079536f 100644
--- a/analytics-sample/pom.xml
+++ b/analytics-sample/pom.xml
@@ -6,12 +6,12 @@
   <parent>
     <artifactId>analytics-parent</artifactId>
     <groupId>com.segment.analytics.java</groupId>
-    <version>3.5.5-SNAPSHOT</version>
+    <version>3.5.6-SNAPSHOT</version>
   </parent>
 
   <groupId>com.segment.analytics.java</groupId>
   <artifactId>analytics-sample</artifactId>
-  <version>3.5.5-SNAPSHOT</version>
+  <version>3.5.6-SNAPSHOT</version>
   <name>Analytics Sample</name>
 
   <description>Sample application demonstrating Segment Analytics for Java.</description>
@@ -28,7 +28,7 @@
     <url>https://github.com/segmentio/analytics-java/</url>
     <connection>scm:git:https://github.com/segmentio/analytics-java.git</connection>
     <developerConnection>scm:git:git@github.com:segmentio/analytics-java.git</developerConnection>
-    <tag>analytics-parent-3.5.4</tag>
+    <tag>analytics-parent-3.5.5</tag>
   </scm>
 
   <developers>
diff --git a/analytics-spring-boot-starter/pom.xml b/analytics-spring-boot-starter/pom.xml
index 4ebc8959..b1cfa497 100644
--- a/analytics-spring-boot-starter/pom.xml
+++ b/analytics-spring-boot-starter/pom.xml
@@ -6,12 +6,12 @@
   <parent>
     <groupId>com.segment.analytics.java</groupId>
     <artifactId>analytics-parent</artifactId>
-    <version>3.5.5-SNAPSHOT</version>
+    <version>3.5.6-SNAPSHOT</version>
   </parent>
 
   <groupId>com.segment.analytics.java</groupId>
   <artifactId>analytics-spring-boot-starter</artifactId>
-  <version>3.5.5-SNAPSHOT</version>
+  <version>3.5.6-SNAPSHOT</version>
   <name>Spring Boot starter for Segment Analytics for Java</name>
 
   <description>Spring Boot auto-configuration for Segment Analytics for Java.</description>
@@ -28,7 +28,7 @@
     <url>https://github.com/segmentio/analytics-java/</url>
     <connection>scm:git:https://github.com/segmentio/analytics-java.git</connection>
     <developerConnection>scm:git:git@github.com:segmentio/analytics-java.git</developerConnection>
-    <tag>analytics-parent-3.5.4</tag>
+    <tag>analytics-parent-3.5.5</tag>
   </scm>
 
   <developers>
diff --git a/analytics/pom.xml b/analytics/pom.xml
index 05e36fbb..0c19a777 100644
--- a/analytics/pom.xml
+++ b/analytics/pom.xml
@@ -6,12 +6,12 @@
   <parent>
     <groupId>com.segment.analytics.java</groupId>
     <artifactId>analytics-parent</artifactId>
-    <version>3.5.5-SNAPSHOT</version>
+    <version>3.5.6-SNAPSHOT</version>
   </parent>
 
   <groupId>com.segment.analytics.java</groupId>
   <artifactId>analytics</artifactId>
-  <version>3.5.5-SNAPSHOT</version>
+  <version>3.5.6-SNAPSHOT</version>
   <name>Analytics for Java</name>
 
   <description>The hassle-free way to add analytics to your Java app.</description>
@@ -28,7 +28,7 @@
     <url>https://github.com/segmentio/analytics-java/</url>
     <connection>scm:git:https://github.com/segmentio/analytics-java.git</connection>
     <developerConnection>scm:git:git@github.com:segmentio/analytics-java.git</developerConnection>
-    <tag>analytics-parent-3.5.4</tag>
+    <tag>analytics-parent-3.5.5</tag>
   </scm>
 
   <developers>
diff --git a/e2e-cli/pom.xml b/e2e-cli/pom.xml
index 1aea1231..10710b08 100644
--- a/e2e-cli/pom.xml
+++ b/e2e-cli/pom.xml
@@ -6,12 +6,12 @@
   <parent>
     <artifactId>analytics-parent</artifactId>
     <groupId>com.segment.analytics.java</groupId>
-    <version>3.5.5-SNAPSHOT</version>
+    <version>3.5.6-SNAPSHOT</version>
   </parent>
 
   <groupId>com.segment.analytics.java</groupId>
   <artifactId>e2e-cli</artifactId>
-  <version>3.5.5-SNAPSHOT</version>
+  <version>3.5.6-SNAPSHOT</version>
   <name>Analytics Java E2E CLI</name>
 
   <description>E2E testing CLI for Segment Analytics for Java.</description>
diff --git a/pom.xml b/pom.xml
index d873d8ba..21a869da 100644
--- a/pom.xml
+++ b/pom.xml
@@ -5,7 +5,7 @@
 
   <groupId>com.segment.analytics.java</groupId>
   <artifactId>analytics-parent</artifactId>
-  <version>3.5.5-SNAPSHOT</version>
+  <version>3.5.6-SNAPSHOT</version>
   <packaging>pom</packaging>
   <name>Analytics for Java (Parent)</name>
   <description>The hassle-free way to add analytics to your Android app.</description>
@@ -60,7 +60,7 @@
     <url>https://github.com/segmentio/analytics-java/</url>
     <connection>scm:git:https://github.com/segmentio/analytics-java.git</connection>
     <developerConnection>scm:git:git@github.com:segmentio/analytics-java.git</developerConnection>
-    <tag>analytics-parent-3.5.4</tag>
+    <tag>analytics-parent-3.5.5</tag>
   </scm>
 
   <issueManagement>