diff --git a/pom.xml b/pom.xml
index dd6071f0..db400328 100644
--- a/pom.xml
+++ b/pom.xml
@@ -28,7 +28,7 @@
     <parent>
       <groupId>org.jenkins-ci.plugins</groupId>
       <artifactId>plugin</artifactId>
-      <version>5.5</version>
+      <version>5.9</version>
       <relativePath />
     </parent>
     <groupId>org.jenkins-ci.plugins.workflow</groupId>
diff --git a/src/main/java/org/jenkinsci/plugins/workflow/log/FileLogStorage.java b/src/main/java/org/jenkinsci/plugins/workflow/log/FileLogStorage.java
index a4d7ae9a..eacd9bbe 100644
--- a/src/main/java/org/jenkinsci/plugins/workflow/log/FileLogStorage.java
+++ b/src/main/java/org/jenkinsci/plugins/workflow/log/FileLogStorage.java
@@ -75,7 +75,6 @@ public static synchronized LogStorage forFile(File log) {
 
     private final File log;
     private final File index;
-    @SuppressFBWarnings(value = "IS2_INCONSISTENT_SYNC", justification = "actually it is always accessed within the monitor")
     private FileOutputStream os;
     @SuppressFBWarnings(value = "IS2_INCONSISTENT_SYNC", justification = "actually it is always accessed within the monitor")
     private long osStartPosition;