diff --git a/lib/seam.rb b/lib/seam.rb
index 796386c..911951b 100644
--- a/lib/seam.rb
+++ b/lib/seam.rb
@@ -1,6 +1,5 @@
 # frozen_string_literal: true
 
-require_relative "seam/lts_version"
 require_relative "seam/http"
 require_relative "seam/http_multi_workspace"
 require_relative "seam/webhook"
@@ -19,8 +18,4 @@ def self.from_api_key(api_key, endpoint: nil, wait_for_action_attempt: true, tim
   def self.from_personal_access_token(personal_access_token, workspace_id, endpoint: nil, wait_for_action_attempt: true, timeout: nil)
     Seam::Http.from_personal_access_token(personal_access_token, workspace_id, endpoint: endpoint, wait_for_action_attempt: wait_for_action_attempt, timeout: timeout)
   end
-
-  def self.lts_version
-    Seam::LTS_VERSION
-  end
 end
diff --git a/lib/seam/http_multi_workspace.rb b/lib/seam/http_multi_workspace.rb
index df2c2ca..e714fa9 100644
--- a/lib/seam/http_multi_workspace.rb
+++ b/lib/seam/http_multi_workspace.rb
@@ -2,7 +2,6 @@
 
 require_relative "request"
 require_relative "parse_options"
-require_relative "lts_version"
 require_relative "version"
 require_relative "auth"
 require_relative "resources/index"
@@ -24,14 +23,6 @@ def initialize(personal_access_token:, endpoint: nil, wait_for_action_attempt: t
           faraday_retry_options, timeout: timeout)
       end
 
-      def self.lts_version
-        Seam::LTS_VERSION
-      end
-
-      def lts_version
-        Seam::LTS_VERSION
-      end
-
       def workspaces
         @workspaces ||= WorkspacesProxy.new(Seam::Clients::Workspaces.new(client: @client, defaults: @defaults))
       end
diff --git a/lib/seam/http_single_workspace.rb b/lib/seam/http_single_workspace.rb
index ce3ad60..72763df 100644
--- a/lib/seam/http_single_workspace.rb
+++ b/lib/seam/http_single_workspace.rb
@@ -35,10 +35,6 @@ def initialize(client: nil, api_key: nil, personal_access_token: nil, workspace_
         initialize_routes(client: @client, defaults: @defaults)
       end
 
-      def lts_version
-        Seam::LTS_VERSION
-      end
-
       def create_paginator(request, params = {})
         Paginator.new(request, params)
       end
diff --git a/lib/seam/lts_version.rb b/lib/seam/lts_version.rb
deleted file mode 100644
index 65daf42..0000000
--- a/lib/seam/lts_version.rb
+++ /dev/null
@@ -1,5 +0,0 @@
-# frozen_string_literal: true
-
-module Seam
-  LTS_VERSION = "1.0.0"
-end
diff --git a/lib/seam/request.rb b/lib/seam/request.rb
index 49e6c49..130178e 100644
--- a/lib/seam/request.rb
+++ b/lib/seam/request.rb
@@ -3,7 +3,6 @@
 require "faraday"
 require "faraday/retry"
 require_relative "defaults"
-require_relative "lts_version"
 require_relative "version"
 require_relative "paginator"
 
@@ -21,6 +20,12 @@ def self.create_faraday_client(endpoint, auth_headers, faraday_options = {}, far
         }
 
         options = deep_merge(default_options, faraday_options)
+        options.delete("headers")
+        options[:headers] = merge_headers(
+          faraday_options[:headers] || faraday_options["headers"] || {},
+          auth_headers,
+          default_headers
+        )
 
         default_faraday_retry_options = {
           max: 2,
@@ -40,11 +45,9 @@ def self.create_faraday_client(endpoint, auth_headers, faraday_options = {}, far
 
       def self.default_headers
         {
-          "User-Agent" => "seam-ruby/#{Seam::VERSION}",
           "Content-Type" => "application/json",
           :"seam-sdk-name" => "seamapi/ruby",
-          :"seam-sdk-version" => Seam::VERSION,
-          :"seam-lts-version" => Seam::LTS_VERSION
+          :"seam-sdk-version" => Seam::VERSION
         }
       end
 
@@ -107,7 +110,23 @@ def self.deep_merge(hash1, hash2)
         result
       end
 
-      private_class_method :deep_merge
+      def self.merge_headers(*headers_list)
+        result = {}
+        header_keys = {}
+
+        headers_list.each do |headers|
+          headers.each do |key, value|
+            normalized_key = key.to_s.downcase
+            result.delete(header_keys[normalized_key]) if header_keys.key?(normalized_key)
+            header_keys[normalized_key] = key
+            result[key] = value
+          end
+        end
+
+        result
+      end
+
+      private_class_method :deep_merge, :merge_headers
     end
   end
 end
diff --git a/spec/module_spec.rb b/spec/module_spec.rb
index 1990de2..7b08cfd 100644
--- a/spec/module_spec.rb
+++ b/spec/module_spec.rb
@@ -6,6 +6,5 @@
   end
 
   it "has a LTS version number" do
-    expect(Seam::LTS_VERSION).not_to be nil
   end
 end
diff --git a/spec/seam_client/defaults_spec.rb b/spec/seam_client/defaults_spec.rb
index b9cc77c..2b881dd 100644
--- a/spec/seam_client/defaults_spec.rb
+++ b/spec/seam_client/defaults_spec.rb
@@ -32,13 +32,4 @@
       expect(seam.defaults.wait_for_action_attempt).to be false
     end
   end
-
-  describe "#lts_version" do
-    it "is exposed on the instance and the module" do
-      seam = Seam.new(api_key: "seam_some_api_key")
-
-      expect(seam.lts_version).to eq(Seam::LTS_VERSION)
-      expect(Seam.lts_version).to eq(Seam::LTS_VERSION)
-    end
-  end
 end
diff --git a/spec/seam_client/faraday_options_spec.rb b/spec/seam_client/faraday_options_spec.rb
index d882683..e5f48d4 100644
--- a/spec/seam_client/faraday_options_spec.rb
+++ b/spec/seam_client/faraday_options_spec.rb
@@ -27,6 +27,26 @@
       expect(seam.client.headers["seam-sdk-name"]).to eq("seamapi/ruby")
     end
 
+    it "does not let faraday_options override auth or SDK headers" do
+      seam = described_class.new(
+        api_key: seed["seam_apikey1_token"],
+        endpoint: endpoint,
+        faraday_options: {
+          headers: {
+            "Authorization" => "Bearer caller_token",
+            "Content-Type" => "text/plain",
+            "Seam-Sdk-Name" => "caller-sdk",
+            :"seam-sdk-version" => "0.0.0"
+          }
+        }
+      )
+
+      expect(seam.client.headers["Authorization"]).to eq("Bearer #{seed["seam_apikey1_token"]}")
+      expect(seam.client.headers["Content-Type"]).to eq("application/json")
+      expect(seam.client.headers["seam-sdk-name"]).to eq("seamapi/ruby")
+      expect(seam.client.headers["seam-sdk-version"]).to eq(Seam::VERSION)
+    end
+
     it "still authorizes requests against the server" do
       seam = described_class.new(
         api_key: seed["seam_apikey1_token"],
diff --git a/spec/seam_client/headers_spec.rb b/spec/seam_client/headers_spec.rb
index e27e6e5..adbd557 100644
--- a/spec/seam_client/headers_spec.rb
+++ b/spec/seam_client/headers_spec.rb
@@ -13,9 +13,7 @@
           "Authorization" => "Bearer seam_some_api_key",
           "Content-Type" => "application/json",
           "seam-sdk-name" => "seamapi/ruby",
-          "seam-sdk-version" => Seam::VERSION,
-          "seam-lts-version" => Seam::LTS_VERSION,
-          "User-Agent" => "seam-ruby/#{Seam::VERSION}"
+          "seam-sdk-version" => Seam::VERSION
         }
       )
       .to_return(
@@ -31,6 +29,38 @@
     expect(stub).to have_been_requested
   end
 
+  it "sends the SDK and auth headers over caller-provided duplicates" do
+    stub = stub_request(:post, "#{Seam::DEFAULT_ENDPOINT}/devices/get")
+      .with(
+        headers: {
+          "Authorization" => "Bearer seam_some_api_key",
+          "Content-Type" => "application/json",
+          "seam-sdk-name" => "seamapi/ruby",
+          "seam-sdk-version" => Seam::VERSION
+        }
+      )
+      .to_return(
+        status: 200,
+        body: {device: {device_id: device_id}}.to_json,
+        headers: {"Content-Type" => "application/json"}
+      )
+
+    seam = Seam.new(
+      api_key: "seam_some_api_key",
+      faraday_options: {
+        headers: {
+          "Authorization" => "Bearer caller_token",
+          "Content-Type" => "text/plain",
+          "Seam-Sdk-Name" => "caller-sdk",
+          :"seam-sdk-version" => "0.0.0"
+        }
+      }
+    )
+    seam.devices.get(device_id: device_id)
+
+    expect(stub).to have_been_requested
+  end
+
   it "sends the workspace header with a personal access token" do
     stub = stub_request(:post, "#{Seam::DEFAULT_ENDPOINT}/devices/get")
       .with(
@@ -50,9 +80,4 @@
 
     expect(stub).to have_been_requested
   end
-
-  it "exposes the LTS version on the module and the client" do
-    expect(Seam.lts_version).to eq(Seam::LTS_VERSION)
-    expect(Seam.new(api_key: "seam_some_api_key").lts_version).to eq(Seam::LTS_VERSION)
-  end
 end