diff --git a/README.md b/README.md
index 81f538d..74c4942 100644
--- a/README.md
+++ b/README.md
@@ -21,3 +21,4 @@ See changelog.
 Thanks to
 - [yokmp](https://mods.factorio.com/user/yokmp) (de)
 - [Spectrus1702](https://github.com/Spectrus1702) (ru)
+- [TheoMarque](https://github.com/TheoMarque) (pl)
diff --git a/changelog.txt b/changelog.txt
index 3cf5806..b198d4f 100644
--- a/changelog.txt
+++ b/changelog.txt
@@ -1,4 +1,9 @@
 ---------------------------------------------------------------------------------------------------
+Version: 0.6.12
+Date: 2021-05-22
+  Features:
+    - Polish localization, thanks to user TheoMarque
+---------------------------------------------------------------------------------------------------
 Version: 0.6.11
 Date: 2021-05-01
   Features:
diff --git a/info.json b/info.json
index c66a17e..05ff9c3 100644
--- a/info.json
+++ b/info.json
@@ -1,6 +1,6 @@
 {
     "name": "bzsilicon",
-    "version": "0.6.11",
+    "version": "0.6.12",
     "factorio_version": "1.1",
     "title": "Silica & Silicon",
     "author": "Brevven",