diff --git a/CMakeLists.txt b/CMakeLists.txt
index f9a83a02a..063d425e7 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -83,7 +83,7 @@ set(TR_VERSION_MAJOR "4")
 set(TR_VERSION_MINOR "0")
 set(TR_VERSION_PATCH "1")
 set(TR_VERSION_BETA_NUMBER "") # empty string for not beta
-set(TR_VERSION_DEV FALSE)
+set(TR_VERSION_DEV TRUE)
 
 # derived from above: release type
 if(TR_VERSION_DEV)