diff --git a/src/rev.cpp.in b/src/rev.cpp.in
index 6b29d150ab..d280cf1233 100644
--- a/src/rev.cpp.in
+++ b/src/rev.cpp.in
@@ -84,7 +84,7 @@ const byte _openttd_revision_tagged = ${REV_ISTAG};
  * It should never contain things like "beta", but only the release version
  * we are compatible with.
  */
-const char _openttd_content_version[] = "12.0";
+const char _openttd_content_version[] = "13.0";
 
 /**
  * The NewGRF revision of OTTD: