diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index 600531e8..e7562934 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1,3 +1,3 @@
 {
-  ".": "0.18.3"
+  ".": "0.19.0"
 }
\ No newline at end of file
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 135de631..a170d3f0 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,13 @@
 # Changelog
 
+## 0.19.0 (2024-03-13)
+
+Full Changelog: [v0.18.3...v0.19.0](https://github.com/Finch-API/finch-api-kotlin/compare/v0.18.3...v0.19.0)
+
+### Features
+
+* add HttpRequestBody.contentLength() ([#112](https://github.com/Finch-API/finch-api-kotlin/issues/112)) ([1a20e88](https://github.com/Finch-API/finch-api-kotlin/commit/1a20e88f22a3b82f79896d800f47519a747978fb))
+
 ## 0.18.3 (2024-03-05)
 
 Full Changelog: [v0.18.2...v0.18.3](https://github.com/Finch-API/finch-api-kotlin/compare/v0.18.2...v0.18.3)
diff --git a/README.md b/README.md
index 3e1278f3..373f54e2 100644
--- a/README.md
+++ b/README.md
@@ -19,7 +19,7 @@ The REST API documentation can be found [in the Finch Documentation Center](htt
 <!-- x-release-please-start-version -->
 
 ```kotlin
-implementation("com.tryfinch.api:finch-kotlin:0.18.3")
+implementation("com.tryfinch.api:finch-kotlin:0.19.0")
 ```
 
 #### Maven
@@ -28,7 +28,7 @@ implementation("com.tryfinch.api:finch-kotlin:0.18.3")
 <dependency>
     <groupId>com.tryfinch.api</groupId>
     <artifactId>finch-kotlin</artifactId>
-    <version>0.18.3</version>
+    <version>0.19.0</version>
 </dependency>
 ```
 
diff --git a/build.gradle.kts b/build.gradle.kts
index 9a7c7e90..5cab60a6 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -4,7 +4,7 @@ plugins {
 
 allprojects {
     group = "com.tryfinch.api"
-    version = "0.18.3" // x-release-please-version
+    version = "0.19.0" // x-release-please-version
 }
 
 nexusPublishing {