diff --git a/Makefile b/Makefile
index a741034a..9caa907c 100644
--- a/Makefile
+++ b/Makefile
@@ -31,8 +31,6 @@
 #  - Public forum : https://groups.google.com/forum/#!forum/lz4c
 # ################################################################
 
-# Version number
-export VERSION := 0.4.5
 
 PRGDIR  = programs
 ZSTDDIR = lib
diff --git a/NEWS b/NEWS
index ee9a4585..d60b363a 100644
--- a/NEWS
+++ b/NEWS
@@ -1,3 +1,7 @@
+v0.4.6
+fix : fast compression mode on Windows
+Improved : high compression mode on repetitive data
+
 v0.4.5
 new : -m/--multiple : compress/decompress multiple files
 
diff --git a/lib/Makefile b/lib/Makefile
index c621f63c..181d4a73 100644
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -32,11 +32,15 @@
 # ################################################################
 
 # Version numbers
-LIBVER_MAJOR=`sed -n '/define ZSTD_VERSION_MAJOR/s/.*[[:blank:]]\([0-9][0-9]*\).*/\1/p' < zstd.h`
-LIBVER_MINOR=`sed -n '/define ZSTD_VERSION_MINOR/s/.*[[:blank:]]\([0-9][0-9]*\).*/\1/p' < zstd.h`
-LIBVER_PATCH=`sed -n '/define ZSTD_VERSION_RELEASE/s/.*[[:blank:]]\([0-9][0-9]*\).*/\1/p' < zstd.h`
-LIBVER  = $(LIBVER_MAJOR).$(LIBVER_MINOR).$(LIBVER_PATCH)
-VERSION?= $(LIBVER)
+LIBVER_MAJOR_SCRIPT:=`sed -n '/define ZSTD_VERSION_MAJOR/s/.*[[:blank:]]\([0-9][0-9]*\).*/\1/p' < zstd.h`
+LIBVER_MINOR_SCRIPT:=`sed -n '/define ZSTD_VERSION_MINOR/s/.*[[:blank:]]\([0-9][0-9]*\).*/\1/p' < zstd.h`
+LIBVER_PATCH_SCRIPT:=`sed -n '/define ZSTD_VERSION_RELEASE/s/.*[[:blank:]]\([0-9][0-9]*\).*/\1/p' < zstd.h`
+LIBVER_SCRIPT:= $(LIBVER_MAJOR_SCRIPT).$(LIBVER_MINOR_SCRIPT).$(LIBVER_PATCH_SCRIPT)
+LIBVER_MAJOR := $(shell echo $(LIBVER_MAJOR_SCRIPT))
+LIBVER_MINOR := $(shell echo $(LIBVER_MINOR_SCRIPT))
+LIBVER_PATCH := $(shell echo $(LIBVER_PATCH_SCRIPT))
+LIBVER := $(shell echo $(LIBVER_SCRIPT))
+VERSION:= $(LIBVER)
 
 DESTDIR?=
 PREFIX ?= /usr/local
@@ -98,12 +102,13 @@ clean:
 #make install is validated only for Linux, OSX, kFreeBSD and Hurd targets
 ifneq (,$(filter $(shell uname),Linux Darwin GNU/kFreeBSD GNU))
 
-libzstd.pc: libzstd.pc.in Makefile
+libzstd.pc:
+libzstd.pc: libzstd.pc.in
 	@echo creating pkgconfig
 	@sed -e 's|@PREFIX@|$(PREFIX)|' \
-            -e 's|@LIBDIR@|$(LIBDIR)|' \
-            -e 's|@INCLUDEDIR@|$(INCLUDEDIR)|' \
-            -e 's|@VERSION@|$(VERSION)|' \
+             -e 's|@LIBDIR@|$(LIBDIR)|' \
+             -e 's|@INCLUDEDIR@|$(INCLUDEDIR)|' \
+             -e 's|@VERSION@|$(VERSION)|' \
              $< >$@
 
 install: libzstd libzstd.pc
diff --git a/programs/Makefile b/programs/Makefile
index 57fa87c1..b9d51adc 100644
--- a/programs/Makefile
+++ b/programs/Makefile
@@ -30,7 +30,16 @@
 # fullbench32: Same as fullbench, but forced to compile in 32-bits mode
 # ##########################################################################
 
-VERSION?= 0.4.5
+# Version numbers
+LIBVER_MAJOR_SCRIPT:=`sed -n '/define ZSTD_VERSION_MAJOR/s/.*[[:blank:]]\([0-9][0-9]*\).*/\1/p' < ../lib/zstd.h`
+LIBVER_MINOR_SCRIPT:=`sed -n '/define ZSTD_VERSION_MINOR/s/.*[[:blank:]]\([0-9][0-9]*\).*/\1/p' < ../lib/zstd.h`
+LIBVER_PATCH_SCRIPT:=`sed -n '/define ZSTD_VERSION_RELEASE/s/.*[[:blank:]]\([0-9][0-9]*\).*/\1/p' < ../lib/zstd.h`
+LIBVER_SCRIPT:= $(LIBVER_MAJOR_SCRIPT).$(LIBVER_MINOR_SCRIPT).$(LIBVER_PATCH_SCRIPT)
+LIBVER_MAJOR := $(shell echo $(LIBVER_MAJOR_SCRIPT))
+LIBVER_MINOR := $(shell echo $(LIBVER_MINOR_SCRIPT))
+LIBVER_PATCH := $(shell echo $(LIBVER_PATCH_SCRIPT))
+LIBVER := $(shell echo $(LIBVER_SCRIPT))
+VERSION:= $(LIBVER)
 
 DESTDIR?=
 PREFIX ?= /usr/local