diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index 93e8660..d52d2b9 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1,3 +1,3 @@
 {
-  ".": "0.12.2"
+  ".": "0.13.0"
 }
\ No newline at end of file
diff --git a/CHANGELOG.md b/CHANGELOG.md
index a4e52cf..723c248 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,13 @@
 # Changelog
 
+## 0.13.0 (2026-05-07)
+
+Full Changelog: [v0.12.2...v0.13.0](https://github.com/openlayer-ai/openlayer-ruby/compare/v0.12.2...v0.13.0)
+
+### Features
+
+* support setting headers via env ([9818ac9](https://github.com/openlayer-ai/openlayer-ruby/commit/9818ac9cea9643c819533ff310982db22883bdae))
+
 ## 0.12.2 (2026-04-23)
 
 Full Changelog: [v0.12.1...v0.12.2](https://github.com/openlayer-ai/openlayer-ruby/compare/v0.12.1...v0.12.2)
diff --git a/Gemfile.lock b/Gemfile.lock
index 58483b7..9aef4a5 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -11,7 +11,7 @@ GIT
 PATH
   remote: .
   specs:
-    openlayer (0.12.2)
+    openlayer (0.13.0)
       cgi
       connection_pool
 
diff --git a/README.md b/README.md
index 5e4274c..1df318b 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", "~> 0.12.2"
+gem "openlayer", "~> 0.13.0"
 ```
 
 <!-- x-release-please-end -->
diff --git a/lib/openlayer/client.rb b/lib/openlayer/client.rb
index 3859f85..24d534e 100644
--- a/lib/openlayer/client.rb
+++ b/lib/openlayer/client.rb
@@ -69,6 +69,19 @@ def initialize(
     )
       base_url ||= "https://api.openlayer.com/v1"
 
+      headers = {}
+      custom_headers_env = ENV["OPENLAYER_CUSTOM_HEADERS"]
+      unless custom_headers_env.nil?
+        parsed = {}
+        custom_headers_env.split("\n").each do |line|
+          colon = line.index(":")
+          unless colon.nil?
+            parsed[line[0...colon].strip] = line[(colon + 1)..].strip
+          end
+        end
+        headers = parsed.merge(headers)
+      end
+
       @api_key = api_key&.to_s
 
       super(
@@ -76,7 +89,8 @@ def initialize(
         timeout: timeout,
         max_retries: max_retries,
         initial_retry_delay: initial_retry_delay,
-        max_retry_delay: max_retry_delay
+        max_retry_delay: max_retry_delay,
+        headers: headers
       )
 
       @projects = Openlayer::Resources::Projects.new(client: self)
diff --git a/lib/openlayer/version.rb b/lib/openlayer/version.rb
index 182419c..a08a7d4 100644
--- a/lib/openlayer/version.rb
+++ b/lib/openlayer/version.rb
@@ -1,5 +1,5 @@
 # frozen_string_literal: true
 
 module Openlayer
-  VERSION = "0.12.2"
+  VERSION = "0.13.0"
 end