diff --git a/bzsilicon2/changelog.txt b/bzsilicon2/changelog.txt
index 11a161f..8f50000 100644
--- a/bzsilicon2/changelog.txt
+++ b/bzsilicon2/changelog.txt
@@ -1,4 +1,9 @@
 ---------------------------------------------------------------------------------------------------
+Version: 2.0.21
+Date: 07.11.2025
+  Bug Fixes:
+    - bzgas, bzfoundry: Fix dependency cycle in technologies
+---------------------------------------------------------------------------------------------------
 Version: 2.0.20
 Date: 21.10.2025
   Changes:
diff --git a/bzsilicon2/info.json b/bzsilicon2/info.json
index 49a1572..b87a8cf 100644
--- a/bzsilicon2/info.json
+++ b/bzsilicon2/info.json
@@ -1,6 +1,6 @@
 {
   "name": "bzsilicon2",
-  "version": "2.0.20",
+  "version": "2.0.21",
   "factorio_version": "2.0",
   "title": "Silica & Silicon - Legacy",
   "description": "Adds silica, silicon, and basic fiber optics to the game.",