diff --git a/CHANGELOG b/CHANGELOG
index e004866..a2c7ce9 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,3 +1,7 @@
+Version 4.0.0 (2024-09-30)
+--------------------------
+Add caching to lookupSchemasUntil function (#258)
+
 Version 3.2.0 (2024-08-20)
 --------------------------
 Add a function that discovers and looks up schemas without using the list endpoint of an Iglu server (#256)
diff --git a/README.md b/README.md
index b240c3f..c83307b 100644
--- a/README.md
+++ b/README.md
@@ -11,12 +11,12 @@ Iglu Scala Client is used extensively in **[Snowplow][snowplow-repo]** to valida
 
 ## Installation
 
-The latest version of Iglu Scala Client is 3.2.0, which works with Scala 2.12, 2.13, and 3.
+The latest version of Iglu Scala Client is 4.0.0, which works with Scala 2.12, 2.13, and 3.
 
 If you're using SBT, add the following lines to your build file:
 
 ```scala
-val igluClient = "com.snowplowanalytics" %% "iglu-scala-client" % "3.2.0"
+val igluClient = "com.snowplowanalytics" %% "iglu-scala-client" % "4.0.0"
 ```
 
 ## API