diff --git a/pom.xml b/pom.xml
index 2df075f..f0c7124 100644
--- a/pom.xml
+++ b/pom.xml
@@ -16,7 +16,7 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>com.diffblue.cover</groupId>
   <artifactId>cover-annotations</artifactId>
-  <version>1.8.0</version>
+  <version>1.9.1</version>
   <packaging>jar</packaging>
 
   <name>Cover Annotations</name>