diff --git a/wro4j-core/src/main/java/ro/isdc/wro/model/resource/processor/impl/css/AbstractCssUrlRewritingProcessor.java b/wro4j-core/src/main/java/ro/isdc/wro/model/resource/processor/impl/css/AbstractCssUrlRewritingProcessor.java
index <HASH>..<HASH> 100644
--- a/wro4j-core/src/main/java/ro/isdc/wro/model/resource/processor/impl/css/AbstractCssUrlRewritingProcessor.java
+++ b/wro4j-core/src/main/java/ro/isdc/wro/model/resource/processor/impl/css/AbstractCssUrlRewritingProcessor.java
@@ -43,7 +43,7 @@ public abstract class AbstractCssUrlRewritingProcessor
   /**

    * Compiled pattern.

    */

-  protected static final Pattern PATTERN = Pattern.compile(PATTERN_PATH, Pattern.CASE_INSENSITIVE);

+  private static final Pattern PATTERN = Pattern.compile(PATTERN_PATH, Pattern.CASE_INSENSITIVE);

 

   /**

    * {@inheritDoc}
reduce visibility of the PATTERN constant