diff --git a/README.md b/README.md
index 2110efea08..ad58873230 100644
--- a/README.md
+++ b/README.md
@@ -82,11 +82,11 @@ Powering infrastructure near you:
 Download from [Maven Central][maven] or depend via Gradle:
 
 ```gradle
-implementation 'com.github.ben-manes.caffeine:caffeine:2.8.8'
+implementation 'com.github.ben-manes.caffeine:caffeine:2.9.0'
 
 // Optional extensions
-implementation 'com.github.ben-manes.caffeine:guava:2.8.8'
-implementation 'com.github.ben-manes.caffeine:jcache:2.8.8'
+implementation 'com.github.ben-manes.caffeine:guava:2.9.0'
+implementation 'com.github.ben-manes.caffeine:jcache:2.9.0'
 ```
 
 See the [release notes][releases] for details of the changes.
diff --git a/simulator/src/main/resources/reference.conf b/simulator/src/main/resources/reference.conf
index d8281dfe0e..93508ea17f 100644
--- a/simulator/src/main/resources/reference.conf
+++ b/simulator/src/main/resources/reference.conf
@@ -106,9 +106,6 @@ caffeine.simulator {
     product.Ehcache3,
     product.ExpiringMap,
     product.ElasticSearch,
-
-    # Requires JDK9
-    #product.Collision,
   ]
 
   # The admission policy (opposite of eviction policy)