diff --git a/CHANGELOG.md b/CHANGELOG.md
index 2db520003..064ca2f95 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,10 @@
 ChangeLog
 =========
 
+4.11.0 (2022-04-22)
+-------------------
+* #50 Add lowercase timezone finder 
+
 4.10.0 (2022-03-08)
 -------------------
 * #48 Block invalid combinations of FREQ with BY rules
diff --git a/lib/Version.php b/lib/Version.php
index 677b4ed95..3d6cf4be4 100644
--- a/lib/Version.php
+++ b/lib/Version.php
@@ -14,5 +14,5 @@ class Version
     /**
      * Full version number.
      */
-    const VERSION = '4.10.0';
+    const VERSION = '4.11.0';
 }