diff --git a/CMakeLists.txt b/CMakeLists.txt
index 5bb5cab7a..2fd499c1c 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -8,7 +8,7 @@ project(dfhack)
 
 # set up versioning.
 set(DF_VERSION "50.09")
-set(DFHACK_RELEASE "r3")
+set(DFHACK_RELEASE "r4")
 set(DFHACK_PRERELEASE FALSE)
 
 set(DFHACK_VERSION "${DF_VERSION}-${DFHACK_RELEASE}")
diff --git a/docs/changelog.txt b/docs/changelog.txt
index 36636d001..c29879631 100644
--- a/docs/changelog.txt
+++ b/docs/changelog.txt
@@ -53,6 +53,22 @@ Template for new versions:
 
 ## New Tools
 
+## New Features
+
+## Fixes
+
+## Misc Improvements
+
+## Documentation
+
+## API
+
+## Lua
+
+## Removed
+
+# 50.09-r4
+
 ## New Features
 - `dig`: new overlay for ASCII mode that visualizes designations for smoothing, engraving, carving tracks, and carving fortifications
 
@@ -62,7 +78,7 @@ Template for new versions:
 - `gui/mod-manager`: don't continue to display overlay after the raws loading progress bar appears
 
 ## Misc Improvements
-- `sort`: sort by need for training on squad assignment screen
+- `sort`: add sort option for training need on squad assignment screen
 - `sort`: filter mothers with infants, units with weak mental fortitude, and critically injured units on the squad assignment screen
 - `sort`: display a rating relative to the current sort order next to the visible units on the squad assignment screen
 
@@ -75,8 +91,6 @@ Template for new versions:
 ## Lua
 - ``argparse.boolean``: convert arguments to lua boolean values.
 
-## Removed
-
 # 50.09-r3
 
 ## New Features
diff --git a/library/xml b/library/xml
index ecbd6f684..d5f808c73 160000
--- a/library/xml
+++ b/library/xml
@@ -1 +1 @@
-Subproject commit ecbd6f684abd79d4438fe4ab48b3b0126bbc21d1
+Subproject commit d5f808c73973432b7d04277acaa571e0ab385141
diff --git a/scripts b/scripts
index 2ecd256e7..0f457b565 160000
--- a/scripts
+++ b/scripts
@@ -1 +1 @@
-Subproject commit 2ecd256e7a15fd9134e0a27fbcacae419cf94a23
+Subproject commit 0f457b56595f0e7eaba8300a6870af406b1154f6