diff --git a/Makefile b/Makefile
index d714c987..cbef731f 100644
--- a/Makefile
+++ b/Makefile
@@ -1,6 +1,3 @@
 all:
 	@echo && date
-	export CGO_ENABLED=0
-	export GOPRIVATE=github.com
-	export GOPROXY=https://goproxy.cn
-	go build -o bin/ice.bin src/main.go && chmod u+x bin/ice.bin && ./bin/ice.sh restart
+	CGO_ENABLED=0 GOPRIVATE=github.com GOPROXY=https://goproxy.cn go build -o bin/ice.bin src/main.go && chmod u+x bin/ice.bin && ./bin/ice.sh restart
diff --git a/go.mod b/go.mod
index 034d66fb..cff4e96a 100644
--- a/go.mod
+++ b/go.mod
@@ -2,8 +2,8 @@ module contexts
 
 go 1.13
 
-require github.com/shylinux/icebergs v0.1.17 // indirect
+require github.com/shylinux/icebergs v0.1.18 // indirect
 
-// replace github.com/shylinux/icebergs => ./usr/icebergs
+replace github.com/shylinux/icebergs => ./usr/icebergs
 
 // replace github.com/shylinux/toolkits => ./usr/toolkits
diff --git a/go.sum b/go.sum
index d2ada77c..6d9b8c72 100644
--- a/go.sum
+++ b/go.sum
@@ -10,6 +10,8 @@ github.com/shylinux/icebergs v0.1.16 h1:xQKxyEyPjDDEyA5tXfgfzBVtOMHwdp41RHDWoRWP
 github.com/shylinux/icebergs v0.1.16/go.mod h1:BJmCSc9fcJ/7wgx93yWsdbz+sjZke65o99mGO7lTe+4=
 github.com/shylinux/icebergs v0.1.17 h1:AdbzQb5izi4uOGCBb6mF6eIuqd/xdFHkjBIg5W/jG3s=
 github.com/shylinux/icebergs v0.1.17/go.mod h1:tKj0hsss2irljPmeBf2dcsgQSxa+nakiXjhI00i/cww=
+github.com/shylinux/icebergs v0.1.18 h1:P/7/h3MkKW3lx2Vj/jlaYWwgdzSP7he/4R6Diy9Uq80=
+github.com/shylinux/icebergs v0.1.18/go.mod h1:tKj0hsss2irljPmeBf2dcsgQSxa+nakiXjhI00i/cww=
 github.com/shylinux/toolkits v0.1.1 h1:w/EjFjRB4V/fIRGXl3zU8MEf647DH2oLswTwGIwF3VM=
 github.com/shylinux/toolkits v0.1.1/go.mod h1:Y68Ot6xOmo1bun67YvqC3chDGeU2gDxtsUnvVDGJm4g=
 github.com/shylinux/toolkits v0.1.2 h1:yP24DXfcU5c7u3NVAxCGiMy5UMBRQH4gkKUZXOIN5fk=