diff --git a/lib/import/otrs/article.rb b/lib/import/otrs/article.rb
index 888f751c5..e62100f28 100644
--- a/lib/import/otrs/article.rb
+++ b/lib/import/otrs/article.rb
@@ -69,10 +69,7 @@ module Import
 
       def map(article)
         mapped = map_default(article)
-        # if no content type is set make sure to remove it
-        # so Zammad can set the default content type
-        mapped.delete(:content_type) if mapped[:content_type].blank?
-        mapped
+        map_content_type(mapped)
       end
 
       def map_default(article)
@@ -85,6 +82,15 @@ module Import
           .merge(article_sender_type(article))
       end
 
+      def map_content_type(mapped)
+        # if no content type is set make sure to remove it
+        # so Zammad can set the default content type
+        mapped.delete(:content_type) if mapped[:content_type].blank?
+        return mapped if !mapped[:content_type]
+        mapped[:content_type].sub!(/;\s?.+?$/, '')
+        mapped
+      end
+
       def article_type(article)
         @article_types[article['ArticleType']] || @article_types['note-internal']
       end
diff --git a/spec/import/otrs/article_spec.rb b/spec/import/otrs/article_spec.rb
index 5fe789608..c74be687b 100644
--- a/spec/import/otrs/article_spec.rb
+++ b/spec/import/otrs/article_spec.rb
@@ -37,7 +37,7 @@ RSpec.describe Import::OTRS::Article do
         from:          '"Betreuter Kunde" <kunde2@kunde.de>,',
         to:            'Postmaster',
         cc:            '',
-        content_type:  'text/plain; charset=utf-8',
+        content_type:  'text/plain',
         subject:       'test #3',
         in_reply_to:   '',
         message_id:    '',