diff --git a/CMakeLists.txt b/CMakeLists.txt
index 0b4c6027f..ed92b1eca 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -8,7 +8,7 @@ project(dfhack)
 
 # set up versioning.
 set(DF_VERSION "50.08")
-set(DFHACK_RELEASE "r2rc1")
+set(DFHACK_RELEASE "r4rc1")
 set(DFHACK_PRERELEASE TRUE)
 
 set(DFHACK_VERSION "${DF_VERSION}-${DFHACK_RELEASE}")