diff --git a/src/main/java/net/sourceforge/plantuml/servlet/DiagramResponse.java b/src/main/java/net/sourceforge/plantuml/servlet/DiagramResponse.java
index fa6887c..e019192 100644
--- a/src/main/java/net/sourceforge/plantuml/servlet/DiagramResponse.java
+++ b/src/main/java/net/sourceforge/plantuml/servlet/DiagramResponse.java
@@ -39,7 +39,6 @@ import net.sourceforge.plantuml.ErrorUml;
 import net.sourceforge.plantuml.FileFormat;
 import net.sourceforge.plantuml.FileFormatOption;
 import net.sourceforge.plantuml.NullOutputStream;
-import net.sourceforge.plantuml.OptionFlags;
 import net.sourceforge.plantuml.SourceStringReader;
 import net.sourceforge.plantuml.StringUtils;
 import net.sourceforge.plantuml.utils.Base64Coder;