diff --git a/src/core/chuck_def.h b/src/core/chuck_def.h
index 352af57bd..b2beee2c3 100644
--- a/src/core/chuck_def.h
+++ b/src/core/chuck_def.h
@@ -49,7 +49,7 @@
 // 1.5.0.0 (ge) | moved to chuck.h for at-a-glance visibility
 // 1.5.2.0 (ge) | moved to chuck_def.h for chugins headers streamlining
 //-----------------------------------------------------------------------------
-#define CHUCK_VERSION_STRING        "1.5.4.2 (chai)"
+#define CHUCK_VERSION_STRING        "1.5.4.3-dev (chai)"
 //-----------------------------------------------------------------------------
 
 
diff --git a/src/makefile b/src/makefile
index ab8875308..7f59e0c14 100644
--- a/src/makefile
+++ b/src/makefile
@@ -16,7 +16,7 @@ CK_HOST_DIR=host
 # where to find RtAudio
 RTAUDIO_DIR=RtAudio
 # chuck version
-CK_VERSION=1.5.4.2
+CK_VERSION=1.5.4.3-dev
 
 
 ########################## DEFAULT MAKE TARGET ################################