diff --git a/source/lib/vagrant-openstack-provider/client/glance.rb b/source/lib/vagrant-openstack-provider/client/glance.rb
index 16c0288..2256d2a 100644
--- a/source/lib/vagrant-openstack-provider/client/glance.rb
+++ b/source/lib/vagrant-openstack-provider/client/glance.rb
@@ -18,18 +18,15 @@ def initialize
       end
 
       def get_api_version_list(env)
-        json = RestUtils.get(env, @session.endpoints[:image],
-                             'X-Auth-Token' => @session.token,
-                             :accept => :json) do |response|
-          log_response(response)
-          case response.code
-          when 200, 300
-            response
-          when 401
-            fail Errors::AuthenticationFailed
-          else
-            fail Errors::VagrantOpenstackError, message: response.to_s
-          end
+        response = RestUtils.get(env, @session.endpoints[:image], 'X-Auth-Token' => @session.token, :accept => :json)
+        log_response(response)
+        case response.code
+        when 200, 300
+          json = response
+        when 401
+          fail Errors::AuthenticationFailed
+        else
+          fail Errors::VagrantOpenstackError, message: response.to_s
         end
         JSON.parse(json)['versions']
       end
diff --git a/source/lib/vagrant-openstack-provider/client/http_utils.rb b/source/lib/vagrant-openstack-provider/client/http_utils.rb
index 07e6798..1afe106 100644
--- a/source/lib/vagrant-openstack-provider/client/http_utils.rb
+++ b/source/lib/vagrant-openstack-provider/client/http_utils.rb
@@ -19,9 +19,10 @@ def get(env, url, headers = {})
         log_request(:GET, url, headers)
 
         authenticated(env) do
-          RestUtils.get(env, url, headers) { |res| handle_response(res) }.tap do
-            @logger.debug("#{calling_method} - end")
-          end
+          res = RestUtils.get(env, url, headers)
+          handle_response(res)
+          @logger.debug("#{calling_method} - end")
+          res
         end
       end
 
@@ -34,9 +35,10 @@ def post(env, url, body = nil, headers = {})
         log_request(:POST, url, body, headers)
 
         authenticated(env) do
-          RestUtils.post(env, url, body, headers) { |res| handle_response(res) }.tap do
-            @logger.debug("#{calling_method} - end")
-          end
+          res = RestUtils.post(env, url, body, headers)
+          handle_response(res)
+          @logger.debug("#{calling_method} - end")
+          res
         end
       end
 
@@ -49,9 +51,10 @@ def delete(env, url, headers = {})
         log_request(:DELETE, url, headers)
 
         authenticated(env) do
-          RestUtils.delete(env, url, headers) { |res| handle_response(res) }.tap do
-            @logger.debug("#{calling_method} - end")
-          end
+          res = RestUtils.delete(env, url, headers)
+          handle_response(res)
+          @logger.debug("#{calling_method} - end")
+          res
         end
       end
 
@@ -60,17 +63,17 @@ def get_api_version_list(env, service_type)
         headers = { 'X-Auth-Token' => @session.token, :accept => :json }
         log_request(:GET, url, headers)
 
-        json = RestUtils.get(env, url, headers) do |response|
-          log_response(response)
-          case response.code
-          when 200, 300
-            response
-          when 401
-            fail Errors::AuthenticationFailed
-          else
-            fail Errors::VagrantOpenstackError, message: response.to_s
-          end
+        response = RestUtils.get(env, url, headers)
+        log_response(response)
+        case response.code
+        when 200, 300
+          json = response
+        when 401
+          fail Errors::AuthenticationFailed
+        else
+          fail Errors::VagrantOpenstackError, message: response.to_s
         end
+
         JSON.parse(json)['versions']
       end
 
diff --git a/source/lib/vagrant-openstack-provider/client/keystone.rb b/source/lib/vagrant-openstack-provider/client/keystone.rb
index 7c16f89..63553be 100644
--- a/source/lib/vagrant-openstack-provider/client/keystone.rb
+++ b/source/lib/vagrant-openstack-provider/client/keystone.rb
@@ -40,20 +40,17 @@ def authenticate(env)
           post_body[:auth][:identity][:password][:user][:password] = config.password
         end
 
-        authentication = RestUtils.post(env, auth_url, post_body.to_json, headers) do |response|
-          log_response(response)
-          case response.code
-          when 200
-            response
-          when 201
-            response
-          when 401
-            fail Errors::AuthenticationFailed
-          when 404
-            fail Errors::BadAuthenticationEndpoint
-          else
-            fail Errors::VagrantOpenstackError, message: response.to_s
-          end
+        response = RestUtils.post(env, auth_url, post_body.to_json, headers)
+        log_response(response)
+        case response.code
+        when 200, 201
+          authentication = response
+        when 401
+          fail Errors::AuthenticationFailed
+        when 404
+          fail Errors::BadAuthenticationEndpoint
+        else
+          fail Errors::VagrantOpenstackError, message: response.to_s
         end
 
         if config.identity_api_version == '2'
diff --git a/source/lib/vagrant-openstack-provider/client/rest_utils.rb b/source/lib/vagrant-openstack-provider/client/rest_utils.rb
index b599adb..76f1b5a 100644
--- a/source/lib/vagrant-openstack-provider/client/rest_utils.rb
+++ b/source/lib/vagrant-openstack-provider/client/rest_utils.rb
@@ -11,28 +11,46 @@ def self._set_proxy(config)
         end
       end
 
-      def self.get(env, url, headers = {}, &block)
+      def self.get(env, url, headers = {})
         config = env[:machine].provider_config
         _set_proxy(config)
-        RestClient::Request.execute(method: :get, url: url, headers: headers,
-                                    timeout: config.http.read_timeout, open_timeout: config.http.open_timeout,
-                                    ssl_ca_file: config.ssl_ca_file, verify_ssl: config.ssl_verify_peer, &block)
+        begin
+          resp = RestClient::Request.execute(method: :get, url: url, headers: headers,
+                                             timeout: config.http.read_timeout, open_timeout: config.http.open_timeout,
+                                             ssl_ca_file: config.ssl_ca_file, verify_ssl: config.ssl_verify_peer)
+        rescue RestClient::ExceptionWithResponse => err
+          resp = err.response
+        end
+
+        resp
       end
 
-      def self.post(env, url, payload, headers = {}, &block)
+      def self.post(env, url, payload, headers = {})
         config = env[:machine].provider_config
         _set_proxy(config)
-        RestClient::Request.execute(method: :post, url: url, payload: payload, headers: headers,
-                                    timeout: config.http.read_timeout, open_timeout: config.http.open_timeout,
-                                    ssl_ca_file: config.ssl_ca_file, verify_ssl: config.ssl_verify_peer, &block)
+        begin
+          resp = RestClient::Request.execute(method: :post, url: url, payload: payload, headers: headers,
+                                             timeout: config.http.read_timeout, open_timeout: config.http.open_timeout,
+                                             ssl_ca_file: config.ssl_ca_file, verify_ssl: config.ssl_verify_peer)
+        rescue RestClient::ExceptionWithResponse => err
+          resp = err.response
+        end
+
+        resp
       end
 
-      def self.delete(env, url, headers = {}, &block)
+      def self.delete(env, url, headers = {})
         config = env[:machine].provider_config
         _set_proxy(config)
-        RestClient::Request.execute(method: :delete, url: url, headers: headers,
-                                    timeout: config.http.read_timeout, open_timeout: config.http.open_timeout,
-                                    ssl_ca_file: config.ssl_ca_file, verify_ssl: config.ssl_verify_peer, &block)
+        begin
+          resp = RestClient::Request.execute(method: :delete, url: url, headers: headers,
+                                             timeout: config.http.read_timeout, open_timeout: config.http.open_timeout,
+                                             ssl_ca_file: config.ssl_ca_file, verify_ssl: config.ssl_verify_peer)
+        rescue RestClient::ExceptionWithResponse => err
+          resp = err.response
+        end
+
+        resp
       end
     end
   end