diff --git a/CHANGELOG.md b/CHANGELOG.md
index bc1709391..5fe10cd9b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,10 @@
+## Unreleased
+
+### Bug Fixes
+
+- Accept Hash in `before_send*` callbacks again ([#2529](https://github.com/getsentry/sentry-ruby/pull/2529))
+  - Fixes [#2526](https://github.com/getsentry/sentry-ruby/issues/2526)
+
 ## 5.22.2
 
 ### Features
@@ -6,7 +13,7 @@
 - Use attempt_threshold to skip reporting on first N attempts ([#2503](https://github.com/getsentry/sentry-ruby/pull/2503))
 - Support `code.namespace` for Ruby 3.4+ stacktraces ([#2506](https://github.com/getsentry/sentry-ruby/pull/2506))
 
-### Bug fixes
+### Bug Fixes
 
 - Default to `internal_error` error type for OpenTelemetry spans [#2473](https://github.com/getsentry/sentry-ruby/pull/2473)
 - Improve `before_send` and `before_send_transaction`'s return value handling ([#2504](https://github.com/getsentry/sentry-ruby/pull/2504))
diff --git a/sentry-ruby/lib/sentry/client.rb b/sentry-ruby/lib/sentry/client.rb
index f1db4a295..9f8c02899 100644
--- a/sentry-ruby/lib/sentry/client.rb
+++ b/sentry-ruby/lib/sentry/client.rb
@@ -183,7 +183,15 @@ def send_event(event, hint = nil)
       if event_type != TransactionEvent::TYPE && configuration.before_send
         event = configuration.before_send.call(event, hint)
 
-        unless event.is_a?(ErrorEvent)
+        case event
+        when ErrorEvent
+          # do nothing
+        when Hash
+          log_debug(<<~MSG)
+            Returning a Hash from before_send is deprecated and will be removed in the next major version.
+            Please return a Sentry::ErrorEvent object instead.
+          MSG
+        else
           # Avoid serializing the event object in this case because we aren't sure what it is and what it contains
           log_debug(<<~MSG)
             Discarded event because before_send didn't return a Sentry::ErrorEvent object but an instance of #{event.class}
@@ -196,10 +204,17 @@ def send_event(event, hint = nil)
       if event_type == TransactionEvent::TYPE && configuration.before_send_transaction
         event = configuration.before_send_transaction.call(event, hint)
 
-        if event.is_a?(TransactionEvent)
+        if event.is_a?(TransactionEvent) || event.is_a?(Hash)
           spans_after = event.is_a?(TransactionEvent) ? event.spans.size : 0
           spans_delta = spans_before - spans_after
           transport.record_lost_event(:before_send, "span", num: spans_delta) if spans_delta > 0
+
+          if event.is_a?(Hash)
+            log_debug(<<~MSG)
+              Returning a Hash from before_send_transaction is deprecated and will be removed in the next major version.
+              Please return a Sentry::TransactionEvent object instead.
+            MSG
+          end
         else
           # Avoid serializing the event object in this case because we aren't sure what it is and what it contains
           log_debug(<<~MSG)
diff --git a/sentry-ruby/spec/sentry/client/event_sending_spec.rb b/sentry-ruby/spec/sentry/client/event_sending_spec.rb
index 0fc9105c1..5e0bcac4e 100644
--- a/sentry-ruby/spec/sentry/client/event_sending_spec.rb
+++ b/sentry-ruby/spec/sentry/client/event_sending_spec.rb
@@ -269,8 +269,22 @@
           123
         end
 
-        client.send_event(event)
+        return_value = client.send_event(event)
         expect(string_io.string).to include("Discarded event because before_send didn't return a Sentry::ErrorEvent object but an instance of Integer")
+        expect(return_value).to eq(nil)
+      end
+
+      it "warns about Hash value's deprecation" do
+        string_io = StringIO.new
+        logger = Logger.new(string_io, level: :debug)
+        configuration.logger = logger
+        configuration.before_send = lambda do |_event, _hint|
+          { foo: "bar" }
+        end
+
+        return_value = client.send_event(event)
+        expect(string_io.string).to include("Returning a Hash from before_send is deprecated and will be removed in the next major version.")
+        expect(return_value).to eq({ foo: "bar" })
       end
     end
 
@@ -323,8 +337,22 @@
           nil
         end
 
-        client.send_event(event)
+        return_value = client.send_event(event)
         expect(string_io.string).to include("Discarded event because before_send_transaction didn't return a Sentry::TransactionEvent object but an instance of NilClass")
+        expect(return_value).to be_nil
+      end
+
+      it "warns about Hash value's deprecation" do
+        string_io = StringIO.new
+        logger = Logger.new(string_io, level: :debug)
+        configuration.logger = logger
+        configuration.before_send_transaction = lambda do |_event, _hint|
+          { foo: "bar" }
+        end
+
+        return_value = client.send_event(event)
+        expect(string_io.string).to include("Returning a Hash from before_send_transaction is deprecated and will be removed in the next major version.")
+        expect(return_value).to eq({ foo: "bar" })
       end
     end