diff --git a/PKGBUILDs/vimb/PKGBUILD b/PKGBUILDs/vimb/PKGBUILD
deleted file mode 100644
index a512b73..0000000
--- a/PKGBUILDs/vimb/PKGBUILD
+++ /dev/null
@@ -1,17 +0,0 @@
-# Maintainer: jun7 <jun7@hush.com>
-pkgname=wyebadblock-vimb
-pkgver=1
-pkgrel=1
-pkgdesc="adblock link to wyebadblock for vimb."
-arch=('x86_64')
-url="https://github.com/jun7/wyebadblock"
-license=('GPL3')
-depends=('wyebadblock-git' 'vimb')
-makedepends=()
-source=()
-
-
-package() {
-	mkdir -p "$pkgdir/usr/lib/vimb"
-	ln -s /usr/lib/wyebrowser/adblock.so "$pkgdir/usr/lib/vimb"
-}
diff --git a/README.md b/README.md
index 58d9567..4c36a83 100644
--- a/README.md
+++ b/README.md
@@ -26,6 +26,11 @@ wyebadblock only checks 'easylist.txt'
 
 You can check whether wyebab has found easylist.txt by `wyebab --css`
 
+## for webkit2gtk-4.1
+	WEBKITVER=4.1 make
+	sudo WEBKITVER=4.1 make install
+Make sure this adds a dir /4.1 before the adblock.so
+
 ## Addition for other webkit2gtk browsers
 webkit2gtk loads extensions in a dir designated by each apps.
 So we have to make a link to wyebab in the dir.
@@ -53,9 +58,7 @@ There is a PKGBUILD file. see the 'PKGBULDs' dir.
 
 ### vimb
 
-	sudo ln -s /usr/lib/wyebrowser/adblock.so /usr/lib/vimb
-
-There is a PKGBUILD file. see the 'PKGBULDs' dir.
+	sudo ln -s /usr/lib/wyebrowser/4.1/adblock.so /usr/lib/vimb
 
 If the path doesn't work, check https://fanglingsu.github.io/vimb/howto.html#block
 
diff --git a/makefile b/makefile
index fc51ff4..c6f9288 100644
--- a/makefile
+++ b/makefile
@@ -1,6 +1,11 @@
 LISTNAME=easylist.txt
 PREFIX ?= /usr
+WEBKITVER ?= 4.0
 EXTENSION_DIR ?= $(PREFIX)/lib/wyebrowser
+
+ifneq ($(WEBKITVER), 4.0)
+	VERDIR=/$(WEBKITVER)
+endif
 ifeq ($(DEBUG), 1)
 	CFLAGS += -Wall
 else
@@ -13,7 +18,7 @@ all: adblock.so wyebab librun.o testrun
 
 adblock.so: ab.c ephy-uri-tester.c ephy-uri-tester.h librun.o makefile
 	$(CC) $(CFLAGS) $(LDFLAGS) -o $@ $< librun.o -shared -fPIC \
-		`pkg-config --cflags --libs gtk+-3.0 glib-2.0 webkit2gtk-4.0` \
+		`pkg-config --cflags --libs gtk+-3.0 glib-2.0 webkit2gtk-$(WEBKITVER)` \
 		$(DDEBUG) -DISEXT -DEXENAME=\"wyebab\"
 
 wyebab: ab.c ephy-uri-tester.c ephy-uri-tester.h librun.o makefile
@@ -39,11 +44,12 @@ clean:
 
 install:
 	install -Dm755 wyebab     $(DESTDIR)$(PREFIX)/bin/wyebab
-	install -Dm755 adblock.so $(DESTDIR)$(EXTENSION_DIR)/adblock.so
+	install -Dm755 adblock.so $(DESTDIR)$(EXTENSION_DIR)$(VERDIR)/adblock.so
 
 uninstall:
 	rm -f  $(PREFIX)/bin/wyebab
-	rm -f  $(EXTENSION_DIR)/adblock.so
+	rm -f  $(EXTENSION_DIR)$(VERDIR)/adblock.so
+	-rmdir $(EXTENSION_DIR)$(VERDIR)
 	-rmdir $(EXTENSION_DIR)