diff --git a/src/Makefile b/src/Makefile
index b61430f..d26148c 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -1,5 +1,5 @@
 EXE = molasses
-VERSION = 0.6.3
+VERSION = 0.6.4
 NATIVE_DIST_DIR = $(EXE)-$(VERSION)
 WIN_BUILD_DIR = cross/x86_64-win32
 MAC_BUILD_DIR = cross/x86_64-macosx
diff --git a/src/const.rkt b/src/const.rkt
index 35adafb..c8dab74 100644
--- a/src/const.rkt
+++ b/src/const.rkt
@@ -1,7 +1,7 @@
 #lang racket/base
 (provide (all-defined-out))
 
-(define molasses-version "0.6.3")
+(define molasses-version "0.6.4")
 (define molasses-site "https://github.com/jjsimpso/molasses")
 
 (define about-version-string