diff --git a/lib/nomad/client.rb b/lib/nomad/client.rb
index ee940a8..22b6423 100644
--- a/lib/nomad/client.rb
+++ b/lib/nomad/client.rb
@@ -136,6 +136,9 @@ def request(verb, path, data = {}, headers = {})
       # Get a list of headers
       headers = DEFAULT_HEADERS.merge(headers)
 
+      # Dynamically read Nomad ACL token
+      headers = headers.merge({"X-Nomad-Token" => nomad_token})
+
       # Add headers
       headers.each do |key, value|
         req.add_field(key, value)
diff --git a/lib/nomad/configurable.rb b/lib/nomad/configurable.rb
index ad06e45..09dc927 100644
--- a/lib/nomad/configurable.rb
+++ b/lib/nomad/configurable.rb
@@ -5,6 +5,7 @@ module Configurable
     def self.keys
       @keys ||= [
         :address,
+        :nomad_token,
         :hostname,
         :open_timeout,
         :proxy_address,
diff --git a/lib/nomad/defaults.rb b/lib/nomad/defaults.rb
index e5ebfcd..0b1cdd0 100644
--- a/lib/nomad/defaults.rb
+++ b/lib/nomad/defaults.rb
@@ -42,6 +42,10 @@ def address
         ENV["NOMAD_ADDR"] || NOMAD_ADDRESS
       end
 
+      def nomad_token
+        ENV["NOMAD_TOKEN"]
+      end
+
       # The SNI host to use when connecting to Nomad via TLS.
       # @return [String, nil]
       def hostname
diff --git a/lib/nomad/response.rb b/lib/nomad/response.rb
index c81b719..91d241b 100644
--- a/lib/nomad/response.rb
+++ b/lib/nomad/response.rb
@@ -31,7 +31,7 @@ class Response
 
       # Parses the value as a string, converting "" to nil (go compat).
       string_as_nil: ->(item) {
-        if item.nil? || item.strip.empty?
+        if item.nil? || item.to_s.strip.empty?
           nil
         else
           item
diff --git a/spec/unit/defaults_spec.rb b/spec/unit/defaults_spec.rb
index 8b025a0..17113ff 100644
--- a/spec/unit/defaults_spec.rb
+++ b/spec/unit/defaults_spec.rb
@@ -22,6 +22,15 @@ module Nomad
       end
     end
 
+    describe ".nomad_token" do
+      it "uses ENV['NOMAD_TOKEN'] if present" do
+        with_stubbed_env("NOMAD_TOKEN" => "test") do
+          expect(Defaults.nomad_token).to eq("test")
+        end
+      end
+    end
+
+
     describe ".hostname" do
       it "defaults to ENV['NOMAD_TLS_SERVER_NAME']" do
         with_stubbed_env("NOMAD_TLS_SERVER_NAME" => "www.foo.com") do