diff --git a/Dockerfile b/Dockerfile
index 9fe81582..79fd2409 100755
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM golang:1.11-alpine AS go
+FROM golang:1.12-alpine AS go
 
 RUN apk update \
     && apk upgrade \
diff --git a/zshrc b/zshrc
index 0bda85d7..4d9fd42f 100755
--- a/zshrc
+++ b/zshrc
@@ -279,7 +279,7 @@ if type git >/dev/null 2>&1; then
     gfr(){
         git fetch --prune;
         git reset --hard origin/$(tb);
-        git branch --merged | grep -vE '^\*|master$|develop$' | xargs -I % git branch -d %
+        git branch --merged | grep -vE '^\*|master$|develop$' | xargs -I % git branch -D %
     }
     alias gfr=gfr
     gfrs(){