diff --git a/shard.yml b/shard.yml
index 84e21a0..05a6b8b 100644
--- a/shard.yml
+++ b/shard.yml
@@ -1,5 +1,5 @@
 name: raven
-version: 1.7.1
+version: 1.7.2
 
 authors:
   - Sijawusz Pur Rahnama <sija@sija.pl>
diff --git a/src/raven/breadcrumb_buffer.cr b/src/raven/breadcrumb_buffer.cr
index 572ab75..b676550 100644
--- a/src/raven/breadcrumb_buffer.cr
+++ b/src/raven/breadcrumb_buffer.cr
@@ -57,7 +57,7 @@ module Raven
     end
 
     def empty?
-      !members.any?
+      members.empty?
     end
 
     def to_hash
diff --git a/src/raven/integrations/kemal/log_handler.cr b/src/raven/integrations/kemal/log_handler.cr
index d4ebb36..140d284 100644
--- a/src/raven/integrations/kemal/log_handler.cr
+++ b/src/raven/integrations/kemal/log_handler.cr
@@ -41,7 +41,7 @@ module Raven
             elapsed = Time.monotonic - time
 
             Raven.breadcrumbs.record do |crumb|
-              unless (200...400).includes? context.response.status_code
+              unless context.response.status_code.in?(100...400)
                 crumb.level = :error
               end
               crumb.type = :http
@@ -54,16 +54,15 @@ module Raven
               }
             end
           end
-          context
         end
       end
 
       def write(message)
         if log_messages?
-          Raven.breadcrumbs.record do |crumb|
-            crumb.category = "kemal"
-            crumb.message = message.strip
-          end
+          Raven.breadcrumbs.record(
+            category: "kemal",
+            message: message.strip
+          )
         end
         @wrapped.try &.write(message)
       end
diff --git a/src/raven/integrations/shared/user_feedback_handler.cr b/src/raven/integrations/shared/user_feedback_handler.cr
index 405690a..a74808b 100644
--- a/src/raven/integrations/shared/user_feedback_handler.cr
+++ b/src/raven/integrations/shared/user_feedback_handler.cr
@@ -5,8 +5,15 @@ module Raven
     rescue ex
       raise ex unless Raven.configuration.capture_allowed?(ex)
       context.response.tap do |response|
-        response.status_code = 500
+        if response.closed?
+          Log.warn {
+            "Couldn't render user feedback view because the response has already been closed"
+          }
+          next
+        end
+        response.status = :internal_server_error
         response.print render_view(ex)
+        response.close
       end
       context
     end
diff --git a/src/raven/processors/http_headers.cr b/src/raven/processors/http_headers.cr
index 044c68f..21fff1e 100644
--- a/src/raven/processors/http_headers.cr
+++ b/src/raven/processors/http_headers.cr
@@ -5,7 +5,7 @@ module Raven
     property sanitize_http_headers : Array(String | Regex)
 
     private def use_boundary?(field)
-      !(field.is_a?(Regex) || DEFAULT_FIELDS.includes?(field))
+      !(field.is_a?(Regex) || field.in?(DEFAULT_FIELDS))
     end
 
     private getter fields_pattern : Regex {
diff --git a/src/raven/processors/sanitize_data.cr b/src/raven/processors/sanitize_data.cr
index 45a7856..76229db 100644
--- a/src/raven/processors/sanitize_data.cr
+++ b/src/raven/processors/sanitize_data.cr
@@ -13,7 +13,7 @@ module Raven
     property? sanitize_credit_cards : Bool
 
     private def use_boundary?(field)
-      !(field.is_a?(Regex) || DEFAULT_FIELDS.includes?(field))
+      !(field.is_a?(Regex) || field.in?(DEFAULT_FIELDS))
     end
 
     private getter fields_pattern : Regex {