diff --git a/tools/sed-i-github-issues/README.md b/tools/sed-i-github-issues/README.md
new file mode 100644
index 000000000..c250c2073
--- /dev/null
+++ b/tools/sed-i-github-issues/README.md
@@ -0,0 +1,7 @@
+# set-i-github-issues
+
+Replace multiple issue bodies at once, with a regexp.
+
+## Example
+
+    GITHUB_TOKEN=xxx sed-i-github-issues -owner=moul -repo=roadmap -pattern "child of" -replace "blocks"
diff --git a/tools/sed-i-github-issues/main.go b/tools/sed-i-github-issues/main.go
new file mode 100644
index 000000000..9ffbc2745
--- /dev/null
+++ b/tools/sed-i-github-issues/main.go
@@ -0,0 +1,55 @@
+package main
+
+import (
+	"context"
+	"flag"
+	"log"
+	"os"
+	"regexp"
+
+	"github.com/google/go-github/github"
+	"golang.org/x/oauth2"
+)
+
+var (
+	owner   = flag.String("owner", "", "github user")
+	repo    = flag.String("repo", "", "github repo")
+	pattern = flag.String("pattern", "", "regex pattern")
+	replace = flag.String("replace", "", "regex replace")
+)
+
+func main() {
+	flag.Parse()
+
+	re := regexp.MustCompile(*pattern)
+
+	// github client
+	ctx := context.Background()
+	ts := oauth2.StaticTokenSource(
+		&oauth2.Token{AccessToken: os.Getenv("GITHUB_TOKEN")},
+	)
+	tc := oauth2.NewClient(ctx, ts)
+	client := github.NewClient(tc)
+	var allIssues []*github.Issue
+	opts := &github.IssueListByRepoOptions{State: "all"}
+	for {
+		issues, resp, err := client.Issues.ListByRepo(ctx, *owner, *repo, opts)
+		if err != nil {
+			log.Fatal(err)
+		}
+		allIssues = append(allIssues, issues...)
+		if resp.NextPage == 0 {
+			break
+		}
+		opts.Page = resp.NextPage
+	}
+	for _, issue := range allIssues {
+		after := re.ReplaceAllString(*issue.Body, *replace)
+		if *issue.Body != after {
+			if _, _, err := client.Issues.Edit(ctx, *owner, *repo, *issue.Number, &github.IssueRequest{Body: &after}); err != nil {
+				log.Fatal(err)
+			}
+			log.Println(*issue.Number)
+		}
+	}
+}