diff --git a/Makefile-variables b/Makefile-variables
index bb70f3f..237a6b4 100644
--- a/Makefile-variables
+++ b/Makefile-variables
@@ -10,7 +10,7 @@ MACOS_LT_11			:= $(shell [ $(MACOS_VER_MAJOR) -eq 10 -a $(MACOS_VER_MINOR) -lt 1
 MACOS_LT_12			:= $(shell [ $(MACOS_VER_MAJOR) -eq 10 -a $(MACOS_VER_MINOR) -lt 16 ] || [ $(MACOS_VER_MAJOR) -lt 12 ] && echo true)
 export MACOSX_DEPLOYMENT_TARGET := $(MACOS_VER_MAJOR).$(MACOS_VER_MINOR)
 # When changing version, also change: getargv++.pc, doxygen.conf, and README.md
-VERSION=0.3
+VERSION=0.4
 #
 COMPAT_VERSION := $(shell echo $(VERSION) | cut -f1 -d.).0
 ARCH				:= $(shell uname -m)
diff --git a/doxygen.conf b/doxygen.conf
index 69d55c6..7b607fb 100644
--- a/doxygen.conf
+++ b/doxygen.conf
@@ -48,7 +48,7 @@ PROJECT_NAME           = "libgetargv++"
 # could be handy for archiving the generated documentation or if some version
 # control system is used.
 
-PROJECT_NUMBER         = 0.3
+PROJECT_NUMBER         = 0.4
 
 # Using the PROJECT_BRIEF tag one can provide an optional one line description
 # for a project that appears at the top of each page and should give viewer a
diff --git a/getargv++.pc b/getargv++.pc
index 0077dc3..c4f7f59 100644
--- a/getargv++.pc
+++ b/getargv++.pc
@@ -5,7 +5,7 @@ libdir=${prefix}/lib
 Name: getargv++
 Description: Library for getting the arguments of other processes.
 URL: https://getargv.narzt.cam/
-Version: 0.3
+Version: 0.4
 Requires: getargv
 Cflags: -I${includedir}
 Libs: -L${libdir} -lgetargv++