diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index b852c1d..791216e 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1,3 +1,3 @@
 {
-  ".": "0.10.3"
+  ".": "0.10.4"
 }
\ No newline at end of file
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 52712ca..b976617 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,13 @@
 # Changelog
 
+## 0.10.4 (2026-02-03)
+
+Full Changelog: [v0.10.3...v0.10.4](https://github.com/openlayer-ai/openlayer-ruby/compare/v0.10.3...v0.10.4)
+
+### Bug Fixes
+
+* **client:** always add content-length to post body, even when empty ([cdd39fc](https://github.com/openlayer-ai/openlayer-ruby/commit/cdd39fc16d16f83a16464447b77c631ad4b6854c))
+
 ## 0.10.3 (2026-01-17)
 
 Full Changelog: [v0.10.2...v0.10.3](https://github.com/openlayer-ai/openlayer-ruby/compare/v0.10.2...v0.10.3)
diff --git a/Gemfile.lock b/Gemfile.lock
index 619432c..1e9a111 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -11,7 +11,7 @@ GIT
 PATH
   remote: .
   specs:
-    openlayer (0.10.3)
+    openlayer (0.10.4)
       cgi
       connection_pool
 
diff --git a/README.md b/README.md
index 98f9870..0756522 100644
--- a/README.md
+++ b/README.md
@@ -17,7 +17,7 @@ To use this gem, install via Bundler by adding the following to your application
 <!-- x-release-please-start-version -->
 
 ```ruby
-gem "openlayer", "~> 0.10.3"
+gem "openlayer", "~> 0.10.4"
 ```
 
 <!-- x-release-please-end -->
diff --git a/lib/openlayer/internal/transport/pooled_net_requester.rb b/lib/openlayer/internal/transport/pooled_net_requester.rb
index d91dd81..6a020df 100644
--- a/lib/openlayer/internal/transport/pooled_net_requester.rb
+++ b/lib/openlayer/internal/transport/pooled_net_requester.rb
@@ -75,7 +75,7 @@ def build_request(request, &blk)
 
             case body
             in nil
-              nil
+              req["content-length"] ||= 0 unless req["transfer-encoding"]
             in String
               req["content-length"] ||= body.bytesize.to_s unless req["transfer-encoding"]
               req.body_stream = Openlayer::Internal::Util::ReadIOAdapter.new(body, &blk)
diff --git a/lib/openlayer/version.rb b/lib/openlayer/version.rb
index 94fed76..74a7a85 100644
--- a/lib/openlayer/version.rb
+++ b/lib/openlayer/version.rb
@@ -1,5 +1,5 @@
 # frozen_string_literal: true
 
 module Openlayer
-  VERSION = "0.10.3"
+  VERSION = "0.10.4"
 end