diff --git a/config/puma.rb b/config/puma.rb
index d4a3e97417..9ba804fbd1 100644
--- a/config/puma.rb
+++ b/config/puma.rb
@@ -3,13 +3,13 @@
 # Any libraries that use thread pools should be configured to match
 # the maximum value specified for Puma.
 #
-threads_min_count = ENV.fetch("RAILS_MIN_THREADS") { 4 }
-threads_max_count = ENV.fetch("RAILS_MAX_THREADS") { 16 }
+threads_min_count = ENV.fetch("RAILS_MIN_THREADS") { 4 }.to_i
+threads_max_count = ENV.fetch("RAILS_MAX_THREADS") { 16 }.to_i
 threads threads_min_count, [threads_min_count, threads_max_count].max
 
 # Specifies the `port` that Puma will listen on to receive requests; default is 3000.
 #
-port ENV.fetch("PORT") { 3000 }
+port ENV.fetch("PORT") { 3000 }.to_i
 
 # Specifies the `environment` that Puma will run in.
 #
@@ -21,7 +21,7 @@ environment ENV.fetch("RAILS_ENV") { "development" }
 # Workers do not work on JRuby or Windows (both of which do not support
 # processes).
 #
-workers ENV.fetch("OPENPROJECT_WEB_WORKERS") { 1 }
+workers ENV.fetch("OPENPROJECT_WEB_WORKERS") { 1 }.to_i
 
 # Use the `preload_app!` method when specifying a `workers` number.
 # This directive tells Puma to first boot the application and load code
diff --git a/modules/bim/lib/open_project/bim/engine.rb b/modules/bim/lib/open_project/bim/engine.rb
index a1d6f4fd5e..cd928704c8 100644
--- a/modules/bim/lib/open_project/bim/engine.rb
+++ b/modules/bim/lib/open_project/bim/engine.rb
@@ -95,7 +95,7 @@ module OpenProject::Bim
 
     assets %w(bim/logo_openproject_bim_big.png)
 
-    patches %i[WorkPackage Type Journal RootSeeder Project]
+    patches %i[WorkPackage Type Journal RootSeeder Project FogFileUploader]
 
     patch_with_namespace :OpenProject, :CustomStyles, :ColorThemes
     patch_with_namespace :API, :V3, :Activities, :ActivityRepresenter
diff --git a/modules/bim/lib/open_project/bim/patches/fog_file_uploader_patch.rb b/modules/bim/lib/open_project/bim/patches/fog_file_uploader_patch.rb
new file mode 100644
index 0000000000..9c4348e932
--- /dev/null
+++ b/modules/bim/lib/open_project/bim/patches/fog_file_uploader_patch.rb
@@ -0,0 +1,15 @@
+module OpenProject::Bim::Patches::FogFileUploaderPatch
+  def self.included(base) # :nodoc:
+    base.prepend InstanceMethods
+  end
+
+  module InstanceMethods
+    def fog_attributes
+      return super unless path.ends_with?(".bcf")
+
+      {
+        "Content-Type" => "application/octet-stream"
+      }
+    end
+  end
+end