diff --git a/CMakeLists.txt b/CMakeLists.txt
index d8c4144655..75daec992f 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -8,7 +8,7 @@ cmake_policy(SET CMP0074 NEW)
 # set up versioning.
 set(DF_VERSION "51.13")
 set(DFHACK_RELEASE "r1")
-set(DFHACK_PRERELEASE FALSE)
+set(DFHACK_PRERELEASE TRUE)
 
 set(DFHACK_VERSION "${DF_VERSION}-${DFHACK_RELEASE}")
 set(DFHACK_ABI_VERSION 2)
diff --git a/library/xml b/library/xml
index ff2e060405..bc6a8bb488 160000
--- a/library/xml
+++ b/library/xml
@@ -1 +1 @@
-Subproject commit ff2e06040572a76afce7311ecffb61f403cc2fbb
+Subproject commit bc6a8bb488c9fc260cc8a11b134419bde7351e6a