diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index fa440d4de..ccad57edc 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1,3 +1,3 @@
 {
-  ".": "0.269.0"
+  ".": "0.269.1"
 }
\ No newline at end of file
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 2b91a3b5b..8df1a4056 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,13 @@
 # Changelog
 
+## 0.269.1 (2025-07-31)
+
+Full Changelog: [v0.269.0...v0.269.1](https://github.com/Increase/increase-java/compare/v0.269.0...v0.269.1)
+
+### Bug Fixes
+
+* **client:** r8 support ([554f5f0](https://github.com/Increase/increase-java/commit/554f5f062658e3cf3a090f6c57d72bc512d70d35))
+
 ## 0.269.0 (2025-07-29)
 
 Full Changelog: [v0.268.0...v0.269.0](https://github.com/Increase/increase-java/compare/v0.268.0...v0.269.0)
diff --git a/README.md b/README.md
index 1dec19a2e..456c01a2c 100644
--- a/README.md
+++ b/README.md
@@ -2,8 +2,8 @@
 
 <!-- x-release-please-start-version -->
 
-[![Maven Central](https://img.shields.io/maven-central/v/com.increase.api/increase-java)](https://central.sonatype.com/artifact/com.increase.api/increase-java/0.269.0)
-[![javadoc](https://javadoc.io/badge2/com.increase.api/increase-java/0.269.0/javadoc.svg)](https://javadoc.io/doc/com.increase.api/increase-java/0.269.0)
+[![Maven Central](https://img.shields.io/maven-central/v/com.increase.api/increase-java)](https://central.sonatype.com/artifact/com.increase.api/increase-java/0.269.1)
+[![javadoc](https://javadoc.io/badge2/com.increase.api/increase-java/0.269.1/javadoc.svg)](https://javadoc.io/doc/com.increase.api/increase-java/0.269.1)
 
 <!-- x-release-please-end -->
 
@@ -13,7 +13,7 @@ The Increase Java SDK is similar to the Increase Kotlin SDK but with minor diffe
 
 <!-- x-release-please-start-version -->
 
-The REST API documentation can be found on [increase.com](https://increase.com/documentation). Javadocs are available on [javadoc.io](https://javadoc.io/doc/com.increase.api/increase-java/0.269.0).
+The REST API documentation can be found on [increase.com](https://increase.com/documentation). Javadocs are available on [javadoc.io](https://javadoc.io/doc/com.increase.api/increase-java/0.269.1).
 
 <!-- x-release-please-end -->
 
@@ -24,7 +24,7 @@ The REST API documentation can be found on [increase.com](https://increase.com/d
 ### Gradle
 
 ```kotlin
-implementation("com.increase.api:increase-java:0.269.0")
+implementation("com.increase.api:increase-java:0.269.1")
 ```
 
 ### Maven
@@ -33,7 +33,7 @@ implementation("com.increase.api:increase-java:0.269.0")
 <dependency>
   <groupId>com.increase.api</groupId>
   <artifactId>increase-java</artifactId>
-  <version>0.269.0</version>
+  <version>0.269.1</version>
 </dependency>
 ```
 
diff --git a/build.gradle.kts b/build.gradle.kts
index 5edf29fc2..01a31048c 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -8,7 +8,7 @@ repositories {
 
 allprojects {
     group = "com.increase.api"
-    version = "0.269.0" // x-release-please-version
+    version = "0.269.1" // x-release-please-version
 }
 
 subprojects {
diff --git a/increase-java-core/src/main/resources/META-INF/proguard/increase-java-core.pro b/increase-java-core/src/main/resources/META-INF/proguard/increase-java-core.pro
index 9a2cf7910..d24c82dc2 100644
--- a/increase-java-core/src/main/resources/META-INF/proguard/increase-java-core.pro
+++ b/increase-java-core/src/main/resources/META-INF/proguard/increase-java-core.pro
@@ -1,5 +1,5 @@
 # Jackson uses reflection and depends heavily on runtime attributes.
--keepattributes
+-keepattributes Exceptions,InnerClasses,Signature,Deprecated,*Annotation*
 
 # Jackson uses Kotlin reflection utilities, which themselves use reflection to access things.
 -keep class kotlin.reflect.** { *; }
@@ -17,13 +17,13 @@
     *;
 }
 
-# Jackson uses reflection to access the default constructors of serializers and deserializers.
--keepclassmembers class * extends com.increase.api.core.BaseSerializer {
-    <init>();
-}
--keepclassmembers class * extends com.increase.api.core.BaseDeserializer {
-    <init>();
-}
+# Jackson uses reified type information to serialize and deserialize our classes (via `TypeReference`).
+-keep class com.fasterxml.jackson.core.type.TypeReference { *; }
+-keep class * extends com.fasterxml.jackson.core.type.TypeReference { *; }
+
+# Jackson uses reflection to access our class serializers and deserializers.
+-keep @com.fasterxml.jackson.databind.annotation.JsonSerialize class com.increase.api.** { *; }
+-keep @com.fasterxml.jackson.databind.annotation.JsonDeserialize class com.increase.api.** { *; }
 
 # Jackson uses reflection to serialize and deserialize our classes based on their constructors and annotated members.
 -keepclassmembers class com.increase.api.** {
diff --git a/increase-java-proguard-test/build.gradle.kts b/increase-java-proguard-test/build.gradle.kts
index d1f45fa62..56bcbbda8 100644
--- a/increase-java-proguard-test/build.gradle.kts
+++ b/increase-java-proguard-test/build.gradle.kts
@@ -4,8 +4,13 @@ plugins {
 }
 
 buildscript {
+    repositories {
+        google()
+    }
+
     dependencies {
         classpath("com.guardsquare:proguard-gradle:7.4.2")
+        classpath("com.android.tools:r8:8.3.37")
     }
 }
 
@@ -15,7 +20,6 @@ dependencies {
     testImplementation("org.junit.jupiter:junit-jupiter-api:5.9.3")
     testImplementation("org.assertj:assertj-core:3.25.3")
     testImplementation("com.fasterxml.jackson.module:jackson-module-kotlin:2.13.4")
-    testImplementation("org.junit.platform:junit-platform-console:1.10.1")
 }
 
 tasks.shadowJar {
@@ -58,17 +62,43 @@ val testProGuard by tasks.registering(JavaExec::class) {
     dependsOn(proguardJar)
     notCompatibleWithConfigurationCache("ProGuard")
 
-    mainClass.set("org.junit.platform.console.ConsoleLauncher")
+    mainClass.set("com.increase.api.proguard.ProGuardCompatibilityTest")
     classpath = files(proguardJarPath)
+}
+
+val r8JarPath = "${layout.buildDirectory.get()}/libs/${project.name}-${project.version}-r8.jar"
+val r8Jar by tasks.registering(JavaExec::class) {
+    group = "verification"
+    dependsOn(tasks.shadowJar)
+    notCompatibleWithConfigurationCache("R8")
+
+    mainClass.set("com.android.tools.r8.R8")
+    classpath = buildscript.configurations["classpath"]
+
     args = listOf(
-        "--classpath", proguardJarPath,
-        "--scan-classpath",
-        "--details", "verbose",
+        "--release",
+        "--classfile",
+        "--output", r8JarPath,
+        "--lib", System.getProperty("java.home"),
+        "--pg-conf", "./test.pro",
+        "--pg-conf", "../increase-java-core/src/main/resources/META-INF/proguard/increase-java-core.pro",
+        "--pg-map-output", "${layout.buildDirectory.get()}/r8-mapping.txt",
+        tasks.shadowJar.get().archiveFile.get().asFile.absolutePath,
     )
 }
 
+val testR8 by tasks.registering(JavaExec::class) {
+    group = "verification"
+    dependsOn(r8Jar)
+    notCompatibleWithConfigurationCache("R8")
+
+    mainClass.set("com.increase.api.proguard.ProGuardCompatibilityTest")
+    classpath = files(r8JarPath)
+}
+
 tasks.test {
     dependsOn(testProGuard)
+    dependsOn(testR8)
     // We defer to the tests run via the ProGuard JAR.
     enabled = false
 }
diff --git a/increase-java-proguard-test/src/test/kotlin/com/increase/api/proguard/ProGuardCompatibilityTest.kt b/increase-java-proguard-test/src/test/kotlin/com/increase/api/proguard/ProGuardCompatibilityTest.kt
index ed80c450e..0d0eb29c2 100644
--- a/increase-java-proguard-test/src/test/kotlin/com/increase/api/proguard/ProGuardCompatibilityTest.kt
+++ b/increase-java-proguard-test/src/test/kotlin/com/increase/api/proguard/ProGuardCompatibilityTest.kt
@@ -8,20 +8,31 @@ import com.increase.api.core.jsonMapper
 import com.increase.api.models.accounts.Account
 import java.time.LocalDate
 import java.time.OffsetDateTime
+import kotlin.reflect.full.memberFunctions
+import kotlin.reflect.jvm.javaMethod
 import org.assertj.core.api.Assertions.assertThat
-import org.junit.jupiter.api.BeforeAll
 import org.junit.jupiter.api.Test
 
 internal class ProGuardCompatibilityTest {
 
     companion object {
 
-        @BeforeAll
         @JvmStatic
-        fun setUp() {
+        fun main(args: Array<String>) {
             // To debug that we're using the right JAR.
             val jarPath = this::class.java.getProtectionDomain().codeSource.location
             println("JAR being used: $jarPath")
+
+            // We have to manually run the test methods instead of using the JUnit runner because it
+            // seems impossible to get working with R8.
+            val test = ProGuardCompatibilityTest()
+            test::class
+                .memberFunctions
+                .asSequence()
+                .filter { function ->
+                    function.javaMethod?.isAnnotationPresent(Test::class.java) == true
+                }
+                .forEach { it.call(test) }
         }
     }
 
diff --git a/increase-java-proguard-test/test.pro b/increase-java-proguard-test/test.pro
index c7a0ba6cc..00aadf0fd 100644
--- a/increase-java-proguard-test/test.pro
+++ b/increase-java-proguard-test/test.pro
@@ -2,4 +2,7 @@
 -keep class com.increase.api.proguard.** { *; }
 
 # For the testing framework.
--keep class org.junit.** { *; }
\ No newline at end of file
+-keep class org.junit.** { *; }
+
+# Many warnings don't apply for our testing purposes.
+-dontwarn
\ No newline at end of file